Chevrolet Air Conditioner Camaro User's Manual
Contents
1. CONTROLS LT BLU BLK 8121 POWERTRAIN n SYSTEM 5111 CONTROL MODULE EODENG 2 IN ENGINE COMPT LI BEHIND RIGHT RIGHT FORWARD 3 m LAMP HARN a 06 z st STRUT TOWER 14 CM FROM a o n gt PCM BREAKOUT Blal c B x z 8 4 5113 y zl m AjC REFRIGERANT ENGINE COOLANT A PRESSURE SENSOR TEMPERATURE G108 ABOVE RIGHT FRONT SENSOR WHEELWELL ATTACHED BELOW 140703 Fig 6 Firebird With 3 8L Manual A C Heater System TOP LEFT SIDE OF RADIATOR SUPPORT TO REFRIGERANT LINE Wiring Diagram Engine THROTTLE BODY 2001 Camaro amp HOT IN RUN 31 VP FUSE HVAC BLOCK gFUSEG BEHIND 720A LEFT SIDE HOT IN RUN f l oF HOT AT BULB TEST zi INTERIOR TIMES OR START LIGHTS SiS TEM 4101 AIC CRUISE FUSE BLOCK S248 A QFUSE FUSE BOTTOM DASH 2 CM FROM 40A 15A LEFT FRONT DRL MODULE BREAKOUT l OF ENGINE cl c2 A HVAC E SELECTOR SWITCH CONTROL i BLOWER SWITCH ASSEMBLY 51655 OFF DEF OFF DEF FORWARD LAMP HARN 7 CM FROM MAX HTR DEF HTRIDEF JUNCTION BLOCK LO HI NORM NORM HTR BREAKOUT BI LV VENT vENT di Ns Re 4 UNDERHOOD AIC BOTTOM BT c2 ET cp py C2. Cl terminal A for open or high resistance Repair Yellow wire as necessary After repair go to step 16 If wire is okay go to next step 7 Turn ignition switch to OFF position Disconnect A C heater control panel harness connector C2 See WIRING DIAGRAMS Turn ignition switch to ON position Using test light connected to ground probe A C heater control panel harness connector C2 terminal Brown wire If test light illuminates go to step 11 If test light does not illuminate go to step 12 8 Check Purple wire between blower motor relay harness connector terminal C1 and blower motor harness connector terminal B for open or high resistance Repair Purple wire as necessary After repair go to step 16 If wire is okay go to next step 9 Check for poor connections or connector damage at blower motor relay harness connector Repair of replace as necessary After repair go to step 16 If connections are okay go to step 13 10 Check for poor connections or connector damage at blower motor harness connector Repair of replace as necessary After repair go to step 16 If connections are okay go to step 14 11 Check for poor connections or connector damage at A C heater control panel harness connector Repair of replace as necessary After repair go to step 16 If connections are okay go to step 15 12 Repair Brown wire between HVAC fuse 20 amp located in instrument panel fuse block and A C heater control panel har
3. ENGINE HARN a OV Sr CENTER e 30M BACKFROM BLOWER DASH ON GENERATOR MOTOR INFLATAELE BREAKOUT RESISTOR C RESTRAINT ASSEMBLY 0 81 DASH MODULE A AIG COMPRESSOR a BRACKET CLUTCH DIODE IN HVAC COMPRESSOR B ENGINE HARN MODULE 0 31 CLUTCH 1 85 BLOWER NEAR BREAKOUT SHN TOTAL MOTOR TO FUEL INJ 2 BEHIND B RIGHT SIDE x lt z e3218 _ OF DASH 9 DASH M HARN 10 x 157115 CMFRON ENGINE HARN CLUSTER x BREAKOUT zy GENERATOR 2 BREAKOUT G200 G203 ES LEFT KICK RIGHT KICK 6114 PANEL PANEL LEFT REAR OF ENGINE HOT AT HOT AT ALL TIMES ALL TIMES M can d A UNDERHOOD COOL FAN COOLFAN FUSE FUSE FUSE BLOCK TO 40 10 I LEFT FRONT 5 CORNER OF a ENGINE COMPT zl ni 459 DKGRNWHT 39 3 2 AIG CLUTGH RLY 762 DKGRNAWHT 22 JI AC REQUEST sic 7777 UNDERHOOD FUSE 3LOCK 1888 LTBLU BLK 340 LINE Sane BOTTOM LEFT FRONT 720 GRY 35 Di operc iem RELAY 1 c RELAY 3 RELAY2 br ENGINE SENSOR GROUND SCOMPT 380 RED BLK 27 B1 Bio 1 CENSOR ole 718 BRN 12 3 z 2 E 2 ECT SENSOR o n E m x a a a 410 YEL 26 ECT SENSOR B 5167 FORWARD LAMP ENGINE C2 COOLING tz FORWARD LAMP HARN HARN NEAR HARN 8 CM FAN E 7 CM FROM UNDERHOOD RIGHT RADIATOR FROM PCM Gi LEFT FUSE BLOCK BREAKOUT 47 335 DK GRN S I Fan RLY ENGINE _ _ _ D ete
4. in Black wire between ground and blower motor harness connector terminal A After repair go to step 20 15 Using test light connected to ground probe A C heater control panel harness connector C2 terminal C Brown wire If test light illuminates go to next step If test light does not illuminate go to step 19 16 Check for open circuit or poor connection between A C heater control panel harness connector C2 terminals B Light Green wire and Brown wire See WIRING DIAGRAMS Repair or replace as necessary After repair go to step 20 If no problem is found go to next step 17 Check for poor connection s or connector damage at A C heater control panel switch harness connectors Repair or replace as necessary After repair go to step 20 If connections are okay go to next step 18 Replace A C heater control panel See A C HEATER CONTROL PANEL under REMOVAL amp INSTALLATION After repair go to step 20 19 Check for poor connection or wire damage in Brown wire between A C heater control panel harness connector C2 terminal C and HVAC fuse 20 amp located in instrument panel fuse block Repair or replace as necessary After repair go to next step 20 Operate blower system to verify repair If blower motor operates normally repair is complete If blower motor is still inoperative return to step 3 2001 Models 1 Perform DIAGNOSTIC SYSTEM TEST Go to next step 2 Turn ignition switch to ON positi
5. left or right A pillar bolted to instrument panel mounting stud behind kick panel are clean and tight Check for a broken or partially broken wire inside of insulation which could cause system malfunction but prove good in a continuity voltage check with system disconnected Check for proper installation of aftermarket electronic equipment SYSTEM TESTS WARNING To avoid injury from accidental air bag deployment read and carefully follow all SERVICE PRECAUTIONS and DISABLING amp ACTIVATING AIR BAG SYSTEM procedures in AIR BAG SYSTEM SAFETY article in GENERAL SERVICING A C SYSTEM PERFORMANCE 1 Rotate temperature control knob from full cold to full hot and back to full cold Listen for temperature valve to seat in both full hot and full cold position If temperature valve seats in both positions go to next step If temperature valve does not seat in both positions go to step 4 2 Park vehicle out of direct sunlight Close doors and windows Open driver s window 5 6 127 152 mm Open engine hood Place vehicle in Park A T or Neutral M T and set parking brake Set temperature control to maximum cold maximum A C and blower to high speed Start engine and go to next step 3 Observe A C compressor If compressor engages go to next step If compressor does not engage see A C COMPRESSOR CLUTCH CONTROLS ALL MODELS article 4 Check cooling fan operation If both cooling fans are operating go to next step If both cooling
6. motor switch in speed position corresponding to wire being tested If test light does not illuminate at any switch position go to next step If test light illuminates at each switch position go to step 17 13 Check suspect blower motor control circuit identified in previous step for open or high resistance Repair suspect wire as necessary After repair go to step 24 If wire is okay go to step 18 14 Check Light Green wire between A C heater control panel harness connector C2 terminal B and blower motor switch harness connector Cl terminal E located at A C heater control panel for open or high resistance Repair Light Green wire as necessary After repair go to step 24 If wire is okay go to step 18 15 Check for poor connections or connector damage at blower motor relay harness connector Repair or replace as necessary After repair go to step 24 If connections are okay go to step 20 16 Check for poor connections or connector damage at blower motor harness connector Repair or replace as necessary After repair go to step 24 If connections are okay go to step 21 17 Check for poor connections or connector damage at blower motor resistor harness connector Repair or replace as necessary After repair go to step 24 If connections are okay go to step 22 18 Check for poor connections or connector damage at A C heater control panel harness connectors Repair or replace as necessary After repair go to step 2
7. old accumulator Add drained amount plus one fluid ounce of new refrigerant oil to new accumulator 2 Clean all fittings with mineral base refrigerant oil Lightly coat all seals with mineral base refrigerant oil before assembling Evacuate and charge A C system ORIFICE EXPANSION TUBE CAUTION If vehicle is equipped with a pressure switch mounted near orifice tube location remove switch before heating inlet tube to prevent damage to switch Removal amp Installation 1 Discharge A C system using approved refrigerant recovery recycling equipment Remove evaporator tube See EVAPORATOR TUBE Using needle nose pliers or orifice tube remover remove orifice tube from evaporator tube 2 If removal of orifice tube is difficult remove as much of the impacted residue as possible Using a heat gun apply heat 1 4 7 mm from dimples on inlet pipe DO NOT overheat evaporator tube 3 To install reverse removal procedure Lubricate new O ring with clean refrigerant oil prior to installation DO NOT soak o ring as this will cause it to expand Insert short screen end of orifice tube first Evacuate charge and leak test A C system TORQUE SPECIFICATIONS TORQUE SPECIFICATIONS Application Ft Lbs H se Fitting At caasa a i enaa a e sie aa E Tube BOLE saes eta d are v eine E Compressor amp Condenser Hose Bolt Comp
8. step If blower motor operates go to 11 4 Ensure mode switch is in OFF position Set blower speed switch at lowest speed position Using test light connected to ground probe blower motor relay harness connector terminal B2 If test light illuminates go to next step If test light does not illuminate go to step 6 5 Check Orange wire between blower motor switch harness connector C1 terminal B and blower motor relay harness connector terminal B2 for short to voltage Repair Orange wire as necessary After repair go to step 14 If wire is okay go to step 10 6 Using test light connected to ground probe blower motor relay harness connector terminal B2 Dark Blue wire If test light illuminates go to next step If test light does not illuminate go to step 9 7 Check Dark Blue wire between blower motor relay harness connector terminal B2 and blower motor resistor harness connector terminal C for short to voltage Repair Dark Blue wire as necessary After repair go to step 14 If wire is okay go to next step 8 Check Yellow Tan and Light Blue wires for short to voltage between blower motor switch harness connector C1 at A C heater control panel and blower motor resistor harness connector Repair Suspect wire as necessary After repair go to step 14 If wires are Okay go to step 10 9 Check for poor connections or connector damage at blower motor relay harness connectors Repair or replace as necessary After repair g
9. 4 If connections are okay go to step 23 19 Repair Red wire between blower motor relay harness connector terminal A2 and I P 1 fuse 40 amp located in underhood fuse block After repair go to step 24 20 Replace blower motor relay After repair go to step 24 21 Replace blower motor See BLOWER MOTOR under REMOVAL amp INSTALLATION After repair go to step 24 22 Replace blower motor resistor See BLOWER MOTOR RESISTOR under REMOVAL amp INSTALLATION After repair go to step 24 23 Replace A C heater control panel See A C HEATER CONTROL PANEL under REMOVAL amp INSTALLATION After repair go to next step 24 Operate blower system to verify repair If blower motor operates normally repair is complete If blower motor is still inoperative return to step 2 REMOVAL amp INSTALLATION WARNING To avoid injury from accidental air bag deployment read and carefully follow all SERVICE PRECAUTIONS and DISABLING amp ACTIVATING AIR BAG SYSTEM procedures in AIR BAG SYSTEM SAFETY article in GENERAL SERVICING A C COMPRESSOR Removal 3 8L Engine 1 Disconnect negative battery cable from engine block ground stud Discharge A C system using approved refrigerant recovery recycling equipment Remove serpentine drive belt Disconnect electrical harness connector Remove strap from compressor and condenser hose assembly 2 Raise and support vehicle Remove compressor and condenser hose bolt Disconnect compressor and co
10. 590 2 T 93 5 MEY ses eG See Ps ena oed 38759 3 13 80290 524555272 12 ere eet e Bie ete 45 65 7 18 See SES a Ce Ee 45 63 7 17 ODDO CSS AJ a aeee e bee Oa E eee ats a eee 55 68 13 20 TOSTIO Op ee Blt cen rth Sig 53 64 12 18 BOU cITU 59 44 sisie cg OEE Sah 58 70 14 21 With relative With relative With relative With relative With relative With relative han 50 percent han 50 percent han 40 percent han 40 percent han 20 percent han 20 percent 5 Co P ee ee e ee DIAGNOSTIC SYSTEM TEST 1 Connect scan tool to Data Link Connector DLC DLC is located under instrument panel near steering column If scan tool powers up go to next step If scan tool does not power up go to appropriate BODY CONTROL MODULES article in ACCESSORIES amp EQUIPMENT 2 Turn ignition switch to ON position Attempt to establish communications with A C heater control module Body Control Module BCM and Powertrain Control Module PCM If communications is establish to all desired modules go to next step If communications is not established to all desired modules go to appropriate BODY CONTROL MODULES article in ACCESSORIES amp EQUIPMENT 3 Following scan tool manufacture
11. A C HEATER SYSTEM MANUAL 2001 Chevrolet Camaro 2000 01 MANUAL A C HEATER SYSTEMS General Motors Chevrolet Camaro Pontiac Firebird PLEASE READ THIS FIRST WARNING To avoid injury from accidental air bag deployment read and carefully follow all SERVICE PRECAUTIONS and DISABLING amp ACTIVATING AIR BAG SYSTEM procedures in AIR BAG RESTRAINT SYSTEM article in ACCESSORIES SAFETY EQUIPMENT section SPECIFICATIONS SPECIFICATIONS Application Specification GOMPLSSSOr TV Oe egesi wai ban ded ad Pub re eee RU Harrison V7 7 Cyl Seen Orl Capacity xy EE a eee eee ee ek E 9 ozs Refrigerant R 134a Capacity 24 0 ozs System Operating Pressures 2 2000 Models SLAS 5 S 115 200 psi 8 1 14 1 kg cm WOW SWS usos ud ee dw Ce 25 37 psi Chee 2 or kg cm 2001 Models ar 202 244 psi 14 2 17 2 kg cm OW SIAE a Galak aw aes S PRIUS 40 44 psi 2 8 3 1 kg cm 1 Use PAG Refrigerant Oil Part No 12345923 2 Measured at ambient temperature of 70 80 F 21 27 with more than 50 percent relative humidity DESCRIPTION The manual A C heater system delivers heated or cooled and dehumidified air Air distribution is controlled through a manual A C heater control panel and vacuum operated doors OPERATION A C HEATER CONTROL PANEL Several mode settings are availabl
12. BLOWER MOTOR RESISTOR under REMOVAL amp INSTALLATION After repair go to step 9 5 Using test light connected to ground individually probe A C heater control panel harness connector Cl terminal which did not cause test light to illuminate in step 2 If test light illuminates go to next step If test light does not illuminate go to step 7 6 Repair open or poor connection in Yellow Tan or Light Blue wire s between A C heater control panel harness connector C1 and blower motor resistor harness connector See WIRING DIAGRAMS After repair go to step 9 7 Check for poor connections or connector damage at A C heater control panel harness connector Cl Repair or replace as necessary After repair go to step 9 If connections are okay go to next step 8 Replace blower motor switch See BLOWER MOTOR SWITCH under REMOVAL amp INSTALLATION After repair go to next step 9 Operate blower system to verify repair If blower motor operates normally repair is complete If blower motor is still inoperative return to step 3 BLOWER MOTOR MALFUNCTIONS 2001 Models 1 Perform DIAGNOSTIC SYSTEM TEST Go to next step 2 Turn ignition switch to ON position Set mode switch to VENT position Turn blower switch to each speed position If blower motor operates normally go to next step If blower motor malfunctions go to step 4 3 Place blower motor switch at maximum speed position Place mode switch in each position If blower op
13. EAKOUT SENSOR GROUND POWERTRAIN CONTROL MODULE IM ENGINE COMPT BEHIND RIGHT STRUT TOWER BED ELK AC REFRIGERANT PRESSURE SENSOR ABOVE RIGHT FRONT WwHEELWELL ATTACHED TO REFRIGERANT LINE 2000 Camaro amp 125176 Fig 5 Manual A C Heater System Wiring Diagram Firebird With 5 7L Engine HOT IN RUN P FUSE HVAC BLOCK FUSE6 8EHIND 9204 LEFT SIDE HOT IN RUN 7 OF DASH HOT AT BULB TEST zi INTERIOR E TIMES OR START ee 4101 AC CRUISE ESF BLOCK 5248 FUSE FUSE BOTTOM gt DASH 2 CM FROM 2 40A 15A LEFT FRONT amp DRL MODULE BREAKOUT a lees ee SEENGINE cc A 1 zl SELECTOR SWITCH CONTROL i BLOWER SWITCH 0 ASSEMBLY 5165 OFF DEF OFF DEF FORWARD LAMP gt y ARN 7 CM FROM MAX HTR DEF MAX HTR DEF JUNCTION BLOCK 2 LO HI NORM HTR m vm BREAKOUT BI LV VENT 1 UNDERHOCD T 075 D3 FUSE BLOCK BOTTOM BT c2 ET AT cp oy COMPRESSOR LEFT FRONT z 2 zl 3 0 CLUTCH RELAY OF ENGINE S 5 COMPT E E 5 es C10 5 L 1 a 5 Z a 3 9 ug z amp d amp gt B A 5 5 s BLOWER 5174 E x lt MOTOR RELAY amp
14. HARM ENGINE COOLING FAN RELAY 1 IN UNDERHOOC ELECTRICAL CENTER LEFT ENGINE COOLING FAN 125175 Manual A C Heater System Wiring Diagram Firebird With 3 8L Engine BLOWER WITCH BLOWER RESTOR I HY A MODULE ENGINE COOLING FAM RELAY 3 IM u MDERHODD ELECTRICAL CENTER FORWARD LAMP HARN 11 CM FROM UNDERHOOO B ELECTRICAL CTR BREAKOUT RIGHT ENGINE COOLING FAM FORWARD LAMP HARM TCM FROM ETCICRUISE CONTROL MODULE xus m al NEAR TOP LEFT SIDE OF THE RADIATOR SUPPORT FORWARD LAMP HARM NEAR RIGHT RADIAT OR SUPPORT CONT ROL HOT AT ALL TIMES MAXLFUSE L INTERIOR LIGHTS 7 3TEM Al AR B2 BLOWER MOTOR RELAY ON INFLATABLE RESTRAINT DASH ce C1 MODULE BRACKET BLOWER MOTOR 216 HARM d0 CM al in FROM iF CLUSTER G200 BREAKOUT LEFT KICK PANEL RIGHT KICK PANEL CLUTCH DIODE ENGINE NEAR BREAKOUT TO FUEL IMJ 2 ENGINE COOLING FAM RELAY 2 IN UNDERHOOD ELECTRICAL CENTER HOT IN RUN ELLE TEST luupERHOOn ELECTRICAL CENTER AIC CRUISE MINI FLISE 5165 FORWARD LAMP HARA TCM FROM ELECTRICAL CENTER BREAKOUT AIC COMPRESSOR RELAY IM UNDERHOOD ELECTRICAL CENTER a e GRM HT ENGINE HARM 3 Ch BACK FROM GENERATOR BREAKOUT COMPRES
15. INSTALLATION After repair go to step 9 6 Check for poor connection or connector damage at blower motor relay harness connector Repair or replace as necessary After repair go to step 9 If connection is okay go to next step 7 Replace blower motor relay After repair go to step 9 8 Repair open or poor connection in Dark Blue wire between blower relay harness connector terminal B2 and blower motor resistor harness connector terminal C After repair go to next step 9 Operate blower system to verify repair If blower motor operates normally repair is complete If blower motor is still inoperative return to step 3 BLOWER SPEED INOPERATIVE IN LOW MEDIUM LOW OR MEDIUM HIGH SPEED 2000 Models 1 Perform DIAGNOSTIC SYSTEM TEST Go to next step 2 Turn ignition switch to OFF position Disconnect blower motor resistor harness connector Turn ignition switch to ON position Set blower motor switch in OFF position Using test light connected to ground probe A C heater control panel harness connector Cl terminal for circuit corresponding to inoperative blower speed See WIRING DIAGRAMS If test light illuminates on suspect circuit go to next step If test light does not illuminate go to step 5 3 Check for poor connection or connector damage at blower motor resistor harness connector Repair or replace as necessary After repair go to step 9 If connections are okay go to next step 4 Replace blower motor resistor See
16. OMPRESSOR EGET PORT z zl 3 e CLUTCH RELAY OF ENGINE r S amp 5 COMPT ES 5 5 z J t x Z a E 4 gt x gt c a B BLOWER x a 5105 CENTER ORE gt ENGINE HARN DASH ON AT AC PRESS BLOWER SENSOR MOTOR l x x RESISTOR RESTRAINT a a ASSEMBLY DASH MODULE IN HVAC BRACKET MODULE 8114 BLOWER Z ENGINE HARN 5 MOTOR 3M BACK FROM BEHIND GENERATOR RIGHT SIDE BREAKOUT unis oF DASH e A COMPRESSOR DASH AIG CLUTCH DIODE 10 X COMPRESSOR IN AIC zl CM FROM 22 CI UTCH SI LUSTER HARNESS BREAKOUT B 6200 6203 LEFT KICK RIGHT KICK m PANEL PANEL 18118 HOTAT HOTAT xl RENE ATE ALL TIMES ALL TIMES al BREAKOUT UNDERHOOD COOL COOL FUSE e cune ao E LEFT REAR 9 OF ENGINE ay ENGINE COMPT c 8178 6 74 UNDERHOOD et FUSE BLOCK COOLING COOLING COOLING FoF FAN FAN FAN iLEFT FRONT 59 DKGRN 18 RELAY 1 RELAY 3 RELAYZ OF ENGINE A C CLUTCH MPT pee ROR NET CLUTCH RLY B6 B 1 3 3 DR SRHMIHT A C REQUEST SIG zx tn E 1 amp 719 PPL 67 B 5167 FORWARD LAMP FORWARD LAMP HARN NEAR 00 8 cw FROM UNDERHOOD RIGHT RADIATOR i AIC SENSOR SIG LEFT FUSE BLOCK SUPPORT 47 DKBLU 33 B Seti FAN RL
17. SOR CLUTCH sus ENGINE HARM AT GENERATOR 1 BREAKOUT LEFT REAR OF ENGINE MiC CLUTCH RELAY CONTROL sae AIC REQUEST HG 335 FAN RLY 1 CONTROL 4713 DK BLU e FAN RLY 2 amp 3 CONTROL 350 REDYBLE AIC SENSOR 516 zT 1638 LT BLUIBLE FORWARD LAMP HARM 14 FROM 2121 EMG HARM amp FROM PCM BREAKOUT BED ELK U LT BLL ELK t a d AC REFRIGERANT PRESSURE SENSOR ABOVE RIGHT FRONT WHEELWELL ATTACHED TO REFRIGERANT LINE 2000 Camaro amp 34 e LIT IZIL u 220 cen ca POWERTRAIN CONTROL MODULE IN ENGINE COMPT BEHIND RIGHT STRUT TOWER HOT IM RUN TT H AC FUSE 20 5248 HP HARM 2 CM FROM MODULE BREAKOUT HOT AT ALL TIMES COOL FAM MIMI FLISE SELECTOR FUSE BLOCK OK GRAM WHT UNDERHOOD ELECTRICAL CENTER che DN COOL FAN MAXI FUSE 3163 FORWARD LAMP HARM amp CM FROM BREAKOUT TOMAIN BRANCH OF UNDERHOOD ELECTRICAL CENTER FORWARD LAMP HARM ENGINE COOLING FAN RELAY 1 IN UNDERHOOC ELECTRICAL CENTER ENGINE COOLING FAM RELAY 3 IM u MDERHODD ELECTRICAL CENTER CONT ROL BLOWER WITCH INTERIOR LIGHTS 7 STEM BLOWER RESTOR I Hv A MODULE 216 uP HARM 10 E FROM NP CLUSTER 5200 SE SREAKOL
18. T LEFT KICK PANEL 5203 RIGHT KICK PANEL ENGINE COOLING FAN RELAY 2 IN UNDERHOOD ELECTRICAL CENTER HOT IN RUM TUNDERHOOD ELECTRICAL CENTER 4fC CRUISE MINI FUSE 5165 FOR ARD LAMP HARM T CM FROM UNDERHOOD ELECTRICAL CENTER 2 BREAROUT BLOWER MOTOR RELAY ON INFLATABLE RESTRAINT DASH MODULE BRACKET BLOWER MOTOR AIC COMPRESSOR RELAY IN UNDERHOOD ELECTRICAL CENTER 2 3 e DE GARNI 105 EMGINE HARA AT AIC REFRIGERANT PRESSURE SENSOR BREAKOUT DK GEM COMPRESSOR CLUTCH sia ENGINE 17 Ch FROM AC COMPRES20R LLITCH BREAKOLT ius EMGINE HARM 27 CM BACK FROM AC CLUTCH IN AIC Zz EPEAKoUT COMPRESSOR CLUTCH WIRING HARNESS euni LEFT REAR OF ENGINE l rop ARD LAMP HARN 11 CM FROM UNDERHOOO B ELECTRICAL CTR BREAKOUT RIGHT ENGINE ENGINE COOLING COOLING FAN FAN LEFT AC CLUTCH RELAY CTRL FORWARD LAMP HARM DK GRMN HT FROM ETC CRUISE CONTROL MODULE BREAKOUT 5a ene aic CLUTCH STATUS DK GAN HT 10 amp MC REQUEST SIG NEAR TOP LEFT SIDE OF 2 THE RADIATOR SUPPORT 335 FAN RLY 1 CONTROL 419 DKBLU 35 ean Fu Y 2 amp 3 l corea FORWARD LAMP HARM NEAR 14 AIC REF PRESS RIGHT RADIATOR SUPPORT SENSOR 215 474 GREY e Ini ECN EN 2126 EMG 4 CM FROM MAP SENSOR BR
19. Y 2 amp 3 335 DKGRN 42 FAN ary 4 ENGINE CONTROLS 4 l e 45 SENSOR GROUND B SYSTEM 128 COOLING FAN d ECT SENSOR RIGHT gt 8 ECT SENSOR amp 3 M ALB POWERTRAIN 5 CONTROL MODULE a IN ENGINE COMPT 65113 BEHIND RIGHT 1 STRUT TOWER I 21 AIC REFRIGERANT ENGINE CCOLANT PRESSURE SENSOR TEMPERATURE SENSOR Giog ABOVE RIGHT FRONT LOWER LEFT TOF LEFT SIDE OF WHEELWELL ATTACHED SIDE OF ENGINE 140708 RADIATOR SUPPORT TO REFRIGERANT LINE ABOVE GENERATOR Fig 7 Manual A C Heater System Wiring Diagram 2001 Camaro amp Firebird With 5 7L Engine A00063334
20. ater control panel harness connector Cl See WIRING DIAGRAMS Repair or replace as necessary After repair go to step 13 If connections are okay go to next step 5 Replace blower motor switch See BLOWER MOTOR SWITCH under REMOVAL amp INSTALLATION After repair go to step 13 6 Connect test light between blower motor relay harness connector terminals A1 Orange wire and C2 Black wire If test light illuminates go to step 8 If test light does not illuminate go to step 9 7 Repair open or poor connection in Orange wire between blower motor relay harness connector terminal 1 and blower motor resistor harness connector terminal C After repair go to step 13 8 Connect test light between blower motor relay harness connector terminals A2 Red wire and C2 Black wire If test light illuminates go to step 10 If test light does not illuminate go to step 12 9 Repair open or poor connection in Black wire between blower motor relay harness connector terminal C2 and ground After repair go to step 13 10 Check for poor connections or connector damage at blower motor relay harness connector Repair or replace as necessary After repair go to step 13 If connections are okay go to next step 11 Replace blower motor relay After repair go to step 13 12 Repair open or poor connection in Red wire between blower motor relay harness connector terminal A2 and I P MAXI FUSE No 1 located in underhood electrical cente
21. e on the A C heater control panel to allow selection of a desirable comfort level See Fig 1 The available settings are as follows OFF No blower and A C operation in this position With vehicle moving forward a slight amount of air will enter passenger compartment MAX Maximum cooling is provided in this setting Conditioned air is distributed through dash registers This is the only mode in which some of the air is recirculated through the A C system Conditioned air is directed through dash registers Bi Level Conditioned air is directed through dash registers and floor outlets A small amount of air is directed to defrost outlets Vent Compressor does not operate in this setting Outside air is delivered through dash registers Heater Compressor does not operate in this setting Outside air is heated and distributed as follows about 80 percent to floor and 20 percent to windshield and side windows Defrost In defrost position air is distributed to windshield Defrost Blend In defrost blend position air is distributed to floor windshield and side windows 1 2 3 45 6 1 Blower Motor Speed Control 6 Bi Level Mode 2 Temperature Control 7 Vent Mode 3 Off Mode 8 Heater Mode 4 Maximum A C Mode 9 Defrost Blend Mode 5 Normal A C Mode 10 Defrost Mode G93E28559 Fig 1 Identifying Control Panel Settings Typical Courtesy of General Motors Corp ADJUSTMENTS TEMPERATURE CONTROL CABLE 1 R
22. emove right instrument panel sound insulator Remove temperature control cable from heater housing Move temperature control knob from full cold to full hot setting If cable binds or pulley does not rotate freely replace cable Set temperature control knob to detent position halfway between full cold and full hot setting 2 If control cable pulley is offset by 5 10 degrees toward full cold side no adjustment is necessary See Fig 2 If control cable pulley is offset toward full hot side remove spring from control cable pulley Rotate pulley 5 10 degrees toward full cold Install control cable pulley spring Install temperature control cable to heater housing 5 10 Spring Pulley Temperature Control Cable G95E60065 Fig Adjusting Temperature Control Cable Courtesy of General Motors Corp TROUBLE SHOOTING NOTE For additional trouble shooting information see MANUAL A C HEATER SYSTEMS TROUBLE SHOOTING article BLOWER MOTOR 1 If blower does not operate check HVAC fuse 20 amp in instrument panel fuse block If fuse is blown check for short to ground in Brown wire between HVAC fuse 20 amp and mode selector switch 3 pin connector terminal C If fuse is okay check I P 1 fuse 40 underhood electrical center If fuse is blown check for short to ground in Red wire between I P 1 fuse 40 amp and blower motor relay harness connector terminal A2 2 Ensure ground connectors located near
23. erates in each switch position problem is intermittent Check for faulty wiring poor connections or damaged components Repair as necessary After repair go to step 24 If no problem is found go to step 18 4 Turn ignition switch to OFF position Disconnect blower motor harness connector Turn ignition switch to ON position Using test light connected to ground probe blower motor harness connector terminal B Purple wire Place blower motor switch in each speed position If test light does not illuminate in each speed position go to next step If test light illuminates in all speed positions go to step 16 5 If test light does not illuminate in maximum speed position go to next step If test light illuminates in maximum speed position go to step 10 6 Turn ignition switch to OFF position Disconnect blower motor relay Turn ignition switch to ON position Using test light connected to ground probe blower motor relay harness connector terminal A2 Red wire If test light illuminates go to next step If test light does not illuminate go to step 19 7 Set blower motor switch in maximum speed position Using test light connected to ground probe blower motor relay harness connector terminal A1 Orange wire If test light does not illuminate go to next step If test light illuminates go to step 9 8 Check Orange wire between blower motor relay harness connector terminal Al and blower motor switch harness connector Cl term
24. ess than 50 percent umidity at more than 50 percent umidity at less than 40 percent umidity at more than 40 percent umidity at less than 20 percent umidity at more than 20 percent SPECIFICATIONS 2001 MODELS High Pressure Low Pressure psi kg cm psi kg cm cd a Aste 0 oma eee 36 41 2 5 2 9 202 244 14 2 17 2 40 44 2 8 3 1 218 261 15 3 16 4 42 46 3 0 3 2 245 293 17 2 20 6 46 51 3 2 3 6 escena 48 53 3 4 3 7 49 54 3 4 3 8 umidity at 0 50 percent umidity at more than 40 percent umidity at more than 60 percent umidity at more than 30 percent umidity at more than 40 percent umidity at more than 20 percent umidity at less than 30 percent OS 50 55 13 18 1 66 75 19 24 2 76 85 25 29 3 86 95 30 35 4 96 105 36 41 6 106 115 42 46 5 116 120 47 49 7 1 With relative 2 With relative 3 With relative 4 With relative 5 With relative 6 With relative 7 With relative EXE A C SYSTEM PERFORMANCE TEMPERATURE SPECIFICATIONS 2001 MODELS Ambient Temp F C Center Vent Temp F C Ome L27 sree a ee a hac ORs eS cha tn Su EE 38 48 3 9 Jp TOM hix ub ete ficus iod scu x ed 40 55 4 13 80
25. fans are not operating see ELECTRIC COOLING FANS ALL MODELS article 5 Connect A C manifold gauge set Place thermometer at instrument panel center vent Set temperature control to maximum cold maximum A C and blower to high speed Run engine at idle for 2 minutes Note high side and low side pressures on A C manifold gauge set Determine relative humidity and ambient air temperature Ensure system is operating within specified range See A C SYSTEM PERFORMANCE PRESSURE SPECIFICATIONS 2000 MODELS and A C SYSTEM PERFORMANCE TEMPERATURE SPECIFICATIONS 2000 MODELS tables Also see A C SYSTEM PERFORMANCE PRESSURE SPECIFICATIONS 2001 MODELS and A C SYSTEM PERFORMANCE TEMPERATURE SPECIFICATIONS 2001 MODELS 6 If system is operating within specified range system is Okay If system is not operating within specified range check Variable Displacement Orifice Tube VDOT system See MANUAL A C HEATER SYSTEMS TROUBLE SHOOTING article A C SYSTEM PERFORMANCE PRESSURE SPECIFICATIONS 2000 MODELS Ambient Temp SE 2217 70 80 21 29 1 70 80 21 29 2 80 90 27 33 1 80 90 27 33 2 90 100 33 38 3 90 100 33 38 4 100 110 38 44 5 100 110 38 44 6 1 With relative 2 With relative 3 With relative 4 With relative 5 With relative 6 With relative A C SYSTEM Ambient Temp 70 80 70 80 80 90 80 90 90 100 90 100 100 110 100 110 With Wit
26. h With With With With P 1 2 3 4 5 6 A C SYSTEM 21 27 21 27 21 33 27 33 33 33 38 44 38 44 38 38 relative relative relative relative relative relative EC Em Eug 43 w High Pressure PERFORMANCE PRESSURE Ambient Temp Low Pressure psi kg cm psi kg em ces ld eee atone 24 34 1 7 2 4 ues 15 200 55 TSI L 25 37 1 8 2 6 AO Oe LOE dowd ds 28 38 2 0 2 7 tam 98092355 exa 3x2 30 40 2 1 2 8 165 260 11 6 18 2 34 43 2 4 3 0 LS Osa MLI 09 aren dde 36 48 2 5 3 4 210 290 14 8 20 4 40 49 2 8 3 4 220 3 qud ux 43 52 3 0 3 7 umidity at less than 50 percent umidity at more than 50 percent umidity at less than 40 percent umidity at more than 40 percent umidity at less than 20 percent umidity at more than 20 percent PERFORMANCE TEMPERATURE SPECIFICATIONS 2000 MODELS Center Vent Temp F pub diss ure E a 38 48 3 9 cata ae ena RE 40 55 4 13 Haas 38 55 3 13 E EE Tt PLE EEA 45 65 7 18 ah aaa een a aire age Sra E uoles 45 63 7 17 rrr 55 68 13 20 eh tun a Aare aa a Mah i E Ss eoe 53 64 12 18 rcc 58 70 14 21 umidity at l
27. inal B located at A C heater control panel for open or high resistance Repair Orange wire as necessary After repair go to step 24 If wire is okay go to step 14 9 Check Black wire for open or high resistance between blower motor relay harness connector terminal C2 and ground Repair Black wire as necessary After repair go to step 24 If wire is okay go to step 15 10 Turn ignition switch to OFF position Disconnect blower motor relay Turn ignition switch to ON position Using test light connected to ground probe blower motor relay harness connector terminal B2 Dark Blue wire Alternately set blower motor switch in minimum M1 medium low and M2 medium high speed positions If test light illuminates in each speed position go to step 15 If test light does not illuminate go to next step 11 Check Dark Blue wire between blower motor relay harness connector terminal B2 and blower motor resistor harness connector terminal C for short to ground open or high resistance Repair Dark Blue wire as necessary After repair go to step 24 If wire is okay go to next step 12 Turn ignition switch to OFF position Disconnect blower motor resistor harness connector Turn ignition switch to ON position Set mode switch in VENT position Using test light connected to ground individually probe blower motor resistor harness connector terminals A Tan wire B Yellow wire and D Light Blue wire See WIRING DIAGRAMS Set blower
28. lower case Using epoxy glue perforated section of heater and A C evaporator case to A C heater case After epoxy dries use thumb to grade sealant on inside and outside to ensure a water tight seal 3 Slide temperature valve case upward into position until upper clip engages Engage snap on left edge of A C heater case to distribution case Refill cooling system Evacuate and charge A C System HEATER CORE CAUTION DO NOT use excessive force to remove heater hoses from heater core pipes Heater core can be damaged Removal Drain cooling system Remove heater hoses from heater core pipes Open glove box Push sides of glove box and remove glove box Remove heater module bolts and cover Remove heater core bolt heater core clamp and heater core Installation To install reverse removal procedure Lubricate heater pipes Verify seal is installed correctly by observing seal from inside engine compartment If seal leaks apply sealer between heater pipes and evaporator housing Refill cooling system ACCUMULATOR Removal Disconnect negative battery cable Discharge A C system using approved refrigerant recovery recycling equipment Remove accumulator tube fitting at accumulator Remove accumulator tube and discard O ring Remove evaporator tube fitting at accumulator Remove accumulator from bracket and discard O ring Installation 1 If accumulator is being replaced drain and measure amount of refrigerant oil in
29. ndenser hose assembly Discard ring Remove compressor bolts Remove compressor and rear bracket if necessary Installation 1 To install reverse removal procedure If compressor is being replaced drain refrigerant oil from old compressor Measure amount of oil from old compressor If measured amount is less than one ounce add 2 ounces to new compressor 2 If more than one ounce is drained from old compressor add same amount to new compressor Clean all fittings with mineral base refrigerant oil Lightly coat all seals with mineral base refrigerant oil before assembling Evacuate and charge A C system Removal 5 7L Engine Disconnect negative battery cable Discharge A C system using approved refrigerant recovery recycling equipment Raise and support vehicle Remove serpentine drive belt and tensioner Remove compressor and condenser hose bolt Disconnect compressor and condenser hose assembly Discard seal Disconnect transmission oil cooler pipes from engine bracket Disconnect compressor electrical connector Remove compressor bolts Remove compressor Installation 1 To install reverse removal procedure If compressor is being replaced drain refrigerant oil from old compressor Measure amount of oil from old compressor If measured amount is less than one ounce add 2 ounces to new compressor 2 If more than one ounce is drained from old compressor add Same amount to new compressor Clean all fittings with mineral ba
30. ness connector C2 terminal C as necessary After repair go to step 16 13 Replace blower motor relay After repair go to step 16 14 Replace blower motor See BLOWER MOTOR under REMOVAL amp INSTALLATION After repair go to step 16 15 Replace A C heater control panel See A C HEATER CONTROL PANEL under REMOVAL amp INSTALLATION After repair go to next step 16 Operate blower system to verify repair If blower motor operates normally repair is complete If blower motor is still inoperative return to step 3 BLOWER MOTOR OPERATES IN HIGH SPEED ONLY 2000 Models 1 Perform DIAGNOSTIC SYSTEM TEST Go to next step 2 Turn ignition switch to ON position Set mode selector Switch in VENT position Set blower motor switch in lowest speed position Using test light connected to ground probe blower motor resistor harness connector terminal C Dark Blue wire If test light illuminates go to next step If test light does not illuminate go to step 4 3 Using test light connected to ground probe blower motor relay harness connector terminal B2 Dark Blue wire If test light illuminates go to step 6 If test light does not illuminate go to step 8 4 Check for poor connection or connector damage at blower motor resistor harness connector Repair or replace as necessary After repair go to step 9 If connection is okay go to next step 5 Replace blower motor resistor See BLOWER MOTOR RESISTOR under REMOVAL amp
31. o to step 14 If connections are okay go to step 12 10 Check for poor connections or connector damage at A C heater control panel harness connectors Repair or replace as necessary After repair go to step 14 If connections are okay go to step 13 11 Repair short to voltage in Purple wire between blower motor harness connector terminal B and blower motor relay harness connector terminal Cl After repair go to step 14 12 Replace blower motor relay After repair go to step 14 13 Replace A C heater control panel See A C HEATER CONTROL PANEL under REMOVAL amp INSTALLATION After repair go to next step 14 Operate blower system to verify repair If blower motor operates normally repair is complete If blower motor is still inoperative return to step 2 BLOWER MOTOR INOPERATIVE IN HIGH SPEED 2000 Models 1 Perform DIAGNOSTIC SYSTEM TEST Go to next step 2 Set mode switch in VENT position Set blower motor switch in highest speed position Using test light connected to ground backprobe A C heater control panel harness connector Cl terminal Orange wire If test light illuminates go to next step If test light does not illuminate go to step 4 3 Using test light connected to ground probe blower motor relay harness connector terminal A1 Orange wire If test light illuminates go to step 6 If test light does not illuminate go to step 7 4 Check for poor connection or connector damage at A C he
32. on Set mode selector switch to VENT position Place blower motor switch in each speed position If blower operates in any position problem is intermittent Check for poor connections loose components or damaged wiring Repair or replace as necessary After repair go to step 16 If blower motor does not operate in any speed position go to next step 3 Turn ignition switch to OFF position Disconnect blower motor harness connector Turn ignition switch to ON position Place blower motor switch in lowest speed position Using test light connected to ground probe blower motor harness connector terminal B Purple wire If test light illuminates go to next step If test light does not illuminate go to step 5 4 Check Black wire between blower motor harness connector terminal and ground for open or high resistance See WIRING DIAGRAMS Repair Black wire as necessary After repair go to step 16 If wire is okay go to step 10 5 Turn ignition switch to OFF position Disconnect blower motor resistor harness connector Turn ignition switch to ON position Set blower motor switch to lowest speed position Using test light connected to ground probe blower motor resistor harness connector terminal B Yellow wire If test light does not illuminate go to next step If test light illuminates go to step 8 6 Check Yellow wire between blower motor resistor harness connector terminal B and A C heater control panel harness connector
33. place blower motor switch See BLOWER MOTOR SWITCH under REMOVAL amp INSTALLATION After repair go to step 20 7 Leave jumper wire connected as described in step 4 Turn ignition switch to OFF position Disconnect blower motor harness connector Turn ignition switch to ON position Connect test light between blower motor harness connector terminals A Black wire and B Purple wire If test light illuminates go to step 11 If test light does not illuminate go to step 10 8 Check for poor connection at blower motor relay harness connector Repair or replace as necessary After repair go to step 20 If connection is okay go to next step 9 Replace blower motor relay After repair go to step 20 10 Leave jumper wire connected Using test light connected to ground probe blower motor harness connector terminal B Purple wire If test light illuminates go to step 14 If test light does not illuminate go to step 13 11 Check for poor connection or connector damage at blower motor harness connector Repair or replace as necessary After repair go to step 20 If connection is okay go to next step 12 Replace blower motor See BLOWER MOTOR under REMOVAL amp INSTALLATION After repair go to step 20 13 Repair open or poor connection in Purple wire between blower motor relay harness connector terminal Cl and blower motor harness connector terminal B After repair go to step 20 14 Repair open or poor connection
34. r After repair go to next step 13 Operate blower system to verify repair If blower motor operates normally repair is complete If blower motor is still inoperative in high speed return to step 3 BLOWER MOTOR INOPERATIVE 2000 Models 1 Perform DIAGNOSTIC SYSTEM TEST Go to next step 2 Turn ignition switch to ON position Set mode selector switch to VENT position Using test light connected to ground probe A C heater control panel harness connector C1 terminal E Light Green wire If test light illuminates go to next step If test light does not illuminate go to step 15 3 Set blower motor switch in low speed position Using test light connected to ground probe A C heater control panel harness connector Cl terminal A Yellow wire If test light illuminates go to next step If test light does not illuminate go to step 5 4 Turn ignition switch to OFF position Disconnect blower motor relay Connect fused jumper wire between blower motor relay harness connector terminal B2 Dark Blue wire and Cl Purple wire Turn ignition switch to ON position Set mode selector switch to VENT position Place blower motor switch in low speed position If blower motor operates go to step 8 If blower motor does not operate go to step 7 5 Check for poor connection or connector damage at blower Switch harness connector Repair or replace as necessary After repair go to step 20 If connection is okay go to next step 6 Re
35. r s instructions select DISPLAY DTCs function for A C heater control module BCM and PCM If any Diagnostic Trouble Codes DICs are displayed go to next step If no DTCs are displayed perform procedure for appropriate symptom 4 If scan tool displays any DTCs beginning with U go to appropriate BODY CONTROL MODULES article in ACCESSORIES amp EQUIPMENT If no DTCs beginning with U are displayed go to next step 5 If scan tool displays any DTCs beginning with B go to appropriate BODY CONTROL MODULES article in ACCESSORIES amp EQUIPMENT If no DTCs beginning with B are displayed go to next step 6 If scan tool displays any DTCs beginning with P go to appropriate SELF DIAGNOSTICS article in ENGINE PERFORMANCE If no DTCs beginning with P are displayed perform procedure for appropriate symptom BLOWER MOTOR ALWAYS ON 2000 Models 1 Perform DIAGNOSTIC SYSTEM TEST Go to next step 2 Turn ignition switch to OFF position Disconnect blower motor relay Using test light connected to ground probe blower motor relay harness connector terminal A1 Orange wire If test light illuminates go to next step If test light does not illuminate go to step 4 3 Repair short to battery voltage in Orange wire between blower motor relay harness connector terminal A1 and blower motor switch harness connector C1 terminal B located at A C heater control panel After repair go to step 9 4 Using test light connected to ground p
36. ressor amp Condenser Hose Fitting At Condenser Compressor amp Condenser Hose Fitting At Accumulator Compressor Support Bracket Bolt I MU M Vr Rear Dow contusa We qu We qu e en arte eate tede e e e e PIA MT rcr Evaporator Tube Bolt At Condenser Evaporator Tube Bolt At Evaporator Evaporator Tube Fitting At Accumulator Generator Bracket Sud L BOLES eG aci we SI ra a VS Brace Ib 3 une Ew oda See os ee eis ge tate dar Bt ded Ss Se INCH Lbs Bracket clamp BOLE wes aa oss a E RR Ea aT Compressor Condenser Hose Clip NUT w saesae aa vie bee bd Rie ws Compressor Low Pressure Cut Off Switch e a Oe Se ee AR qr ue UR ATE oe es Rerlrdgsdgerant Service Valve uiua e See ge a Rios Temperature Control Cable Screw WIRING DIAGRAMS N m Fig 4 SELECTOR SWITCH HOT IN RUN HWAC Fuse FUSE BLOCK 20 5248 HP HARM 2 CM FROM MODULE BREAKOUT OK GRAM WHT UNOERHOOD ELECTRICAL CENTER ee al COOL FAN MAXI FLIEE HOT AT ALL TIMES COOL FAM MIMI FLISE 163 FORWARD LAMP 6 Ch FRONT BREAKOUT TO MAIN BRANCH OF UNDERHOOD ELECTRICAL CENTER FORWARD LAMP
37. robe blower motor relay harness connector terminal 2 Dark Blue wire If test light illuminates go to next step If test light does not illuminate go to step 6 5 Repair short to battery voltage in Dark Blue wire between blower motor relay harness connector terminal B2 and blower motor resistor harness connector terminal C After repair go to step 9 6 Using test light connected to ground probe blower motor relay harness connector terminal Cl Purple wire If test light illuminates go to next step If test light does not illuminate go to step 8 7 Repair short to battery voltage in Purple wire between blower motor relay harness connector terminal Cl and blower motor harness connector terminal After repair go to step 9 8 Replace blower motor relay After repair go to next step 9 Operate blower system to verify repair If blower motor operates normally repair is complete If blower motor is still inoperative return to step 2 2001 Models 1 Perform DIAGNOSTIC SYSTEM TEST Go to next step 2 Turn ignition switch to ON position Set mode switch in OFF position If blower motor is off problem is intermittent Check for faulty wiring or poor connections Repair or replace as necessary After repair go to step 14 If no problem is found go to next step 3 Turn ignition switch to OFF position Disconnect blower motor relay Turn ignition switch to ON position If blower motor does not operate go to next
38. se refrigerant oil Lightly coat all seals with mineral base refrigerant oil before assembling Evacuate and charge A C system A C HEATER CONTROL PANEL Removal amp Installation 1 Disconnect negative battery cable Remove center instrument panel trim plate Remove A C heater control panel retaining bolts 2 Pull A C heater control panel out from dash sufficiently to disconnect wiring harness connectors temperature control cable and vacuum harness Remove A C heater control panel To install reverse removal procedure BLOWER MOTOR Removal amp Installation Remove right side instrument panel insulator Disconnect blower motor harness connector Remove blower motor retaining bolts Remove blower motor To install reverse removal procedure BLOWER MOTOR RESISTOR Removal amp Installation Disconnect negative battery cable Remove right instrument panel insulator Pull carpet away from A C heater case assembly Disconnect blower motor resistor electrical connector Remove mounting bolt from blower motor resistor Remove blower motor resistor To install reverse removal procedure BLOWER MOTOR SWITCH Removal amp Installation Remove A C heater control panel See A C HEATER CONTROL PANEL Pull off blower motor switch knob Remove blower motor switch retaining screw Remove blower motor switch from A C heater control panel To install reverse removal procedure CONDENSER Removal amp Installation 1 Disconnect negati
39. ve battery cable Discharge A C system using approved refrigerant recovery recycling equipment Remove air intake duct and air cleaner assembly Remove upper radiator shroud assembly 2 Raise and support vehicle Remove compressor and condenser hose assembly fitting at condenser Discard O ring Lower vehicle Remove accumulator tube Remove radiator air upper baffle from condenser Remove condenser 3 To install reverse removal procedure Lightly coat rings with mineral base refrigerant oil Evacuate and charge A C system EVAPORATOR TUBE Removal Disconnect negative battery cable Discharge A C system using approved refrigerant recovery recycling equipment Disconnect electrical connector at refrigerant pressure sensor Remove strap from evaporator tube Remove accumulator tube See ACCUMULATOR Remove evaporator tube fitting at accumulator and condenser Remove evaporator tube and discard O rings Installation To install reverse removal procedure Clean all fittings with mineral base refrigerant oil Lightly coat all seals with mineral base refrigerant oil before assembling Evacuate and charge A C system EVAPORATOR Removal 1 Disconnect negative battery cable Discharge A C system using approved refrigerant recovery recycling equipment Remove right instrument panel sound insulator panel Drain cooling system Remove heater hoses at heater core Open glove box Push sides of glove box and remove glove box Remo
40. ve heater core See HEATER CORE 2 Remove temperature control cable at A C heater case Remove bolts located in engine compartment from A C heater case Slide A C heater case down to disengage upper case clip and A C heater case 3 Place a mat on passenger side floor to protect carpeting Using a small hand saw remove perforated section of A C heater case as one piece DO NOT discard Remove bolts and hoses retaining A C evaporator Slide evaporator to left Remove evaporator from A C heater case See Fig 3 1 Valve G93C28573 Fig 3 Exploded View Of A C Heater Assembly Courtesy of General Motors Corp Installation 1 install 10 Evaporator Lower Case 2 Mode Case 11 Impeller 3 Actuator 12 Vacuum Harness 4 Evaporator Upper Case 13 Seal 5 Evaporator 14 Heater Case 6 A C Filter 15 Blower Motor Resistor 7 Evaporator Core Temperature Switch 16 Link 8 Heater Core Clamp 17 Actuator 9 Gasket 18 Actuator reverse removal procedure 19 Actuator 20 Case 21 Valve 22 Air Distribution Case 23 Heater Core 24 Heater amp A C Evaporator Core Case 25 Fan Motor 26 Valve 27 Heater Valve 28 Link Transfer condensate screen to new evaporator Using appropriate adhesive install NEW evaporator core gasket in same position as original Slide new evaporator to right until full seated in A C heater case 2 Apply sealer not epoxy between evaporator and evaporator upper and
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