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Troubleshooting

1. S Replace compressor shaft Is oil contamination found on feeler gauge or clutch sur MES seal gaug Replace compressor clutch face assembly O Check connection of one pin connector in compressor wire harness Is one pin connector loose or YES Repair or replace one pin connec disconnected tor 0 Ey sa z Test compressor clutch coil resistance at one pin connector Is clutch coil resistance within RONCI Replace compressor clutch specification assembly YES See compressor control unit in put test See page 15 9 15 11 Troubleshooting Flow Chart 2 NOTE Perform all checks with the engine running Compressor warning light and cooling fans do not come on BLU RED Disconnect the dual pressure switch GRN RED Connect a jumper wire between BLU RED terminal and body ground a Repair open in BLU RED wire be Does a fd D compres tween A C diodes and dual sor and cooling fans come on pressure switch Connect a jumper wire between BLU RED and GRN RED termi nals Check the A C pressure if OK Does the A C system come on replace the dual pressure switch Reconnect the dual pressure switch and disconnect evapora GRN RED tor sensor connector GRN Connect a jumper wire between GRN RED terminal and body ground Vie
2. NO Is the relay OK YES Connect a jumper from B wire to D Disconnect the fan relay con nector k YES Does cooling fan operate NO Disconnect cooling fan motor connector Connect voltmeter between BLU BLK wire and BLK wire YES Is there battery voltage NO Continued on next page Replace the fuse s Replace the relay CONDENSER RADIATOR FAN RELAY FAN RELAY SOCKET SOCKET BO BO y DO D Continued on next page BLK BLU BLK View from wire side Replace cooling fan motor 15 18 Continued from previous page Connect voltmeter between BLU BLK wire and body ground i lt is there battery voltage Check BLK wire for an open Check the BLU BLK wire for an open Continued from previous page CONDENSER RADIATOR FAN RELAY FAN RELAY 6 SOCKET SOCKET Reconnect the fan relay a BLU BLU BLK BLU Disconnect the 8P connector of the cooling fan control unit BLU BLK Check the continuity between RED GRN or YEL BLK terminal and BLU terminal Is there continuity Repair open RED GRN or YEL BLK between control unit and relay s Repair open BLU wire bet ween relay s and cooling fan control unit Test the cooling fan control unit inputs page 15 17 15 19
3. NOTE Check the A C signal A C CCU lt gt PGM FI ECU PGM FI ECU gt A C DIODES PGM FI CAR ONLY See fuel and emission section CCU Compressor Control Unit 15 15 Troubleshooting Flow Chart 4 Both fans condenser and com pressor fans do not run with A C on Check the fuses No 18 35 39 12 and 36 lt Are the fuses OK 9 Replace the fuse s Remove the radiator and conden sor fan relays Are the relays OK YES Replace the relays Check for battery voltage at ter minal B condensor fan and D radiator fan Is there battery voltage Check connection at fuse box If OK replace fuse box Turn the ignition ON Check for battery voltage at ter minal C aon Is there battery voltage NO See cooling fan control unit input test YES Reinstall both relays Remove A C diode located under right headlight Using a jumper wire connect the BLU wire to body ground lt Do both fans come on YES Replace A C diode Repair open circuit in BLU wire between the underhood relay box and the A C diode 15 16 CONDENSER FAN RELAY SOCKET RADIATOR FAN RELAY SOCKET Cooling Fan Control Unit Input Test All test should be performed with the key ON unless specified otherwise and the cooling fan COOLING FAN CONTROL
4. Troubleshooting e Any abnormality must be corrected before continuting to the next test e Because of the precise measurements needed use a digital voltmeter and ohmmeter when testing Before performing any troubleshooting procedures check e Fuses No 18 36 39 17 12 35 20 e Grounds No G201 G401 G202 G203 e All electrical connections are clean and tight FLOW CHART NO SYMPTOM A C compressor warning light comes ON Compressor warning light and cooling fans do not come on A C compressor does not come on and cooling fans come on Both fans condenser and compressor fans do not run Com pressor operates normally One fan condenser or compressor fan does not run Compressor operates normally NOTE To improve performance when the throttle is opened quickly the signal from the ECU to the A C compressor is interrupted for 4 6 seconds 15 10 Flow Chart 1 A C compressor warning aaa comes on Test compressor belt deflection Ils compressor belt deflection NO Ajust or replace compressor belt correct as necessary YES Is comressor belt contaminated Measure compressor clutch clearance Is compressor clutch clearance between 4 to 6 mm Trace and repair leak clean belt pulley surfaces Replace com pressor belt Remove and measure com pressor clutch shims Add or remove shims as necessary
5. UNIT control unit unplugged unless specified otherwise All test are made from the wire side of the connector Any abnormality must be corrected before continu ing to the next test Before performing any troubleshooting procedures check Fuses No 17 12 36 39 35 All electrical connections are clean and tight NOTE If all tests check OK replace with known good cooling fan control unit View from wire side WIRE COLOR TEST CONDITION IF DESIRED RESULTS ARE NOT OBTAINED YEL BLK Connect to WHT YEL using a Repair open in YEL BLK between cooling fan control unit jumper wire and underhood retay box Condenser fan should come on BLK YEL2 Check for battery voltage Repair open in BLK YEL2 between fuse No 17 and cool ing fan control unit RED GRN Connect to WHT YEL using a Repair open in RED GRN between cooling fan control jumper wire unit and underhood relay box Radiator fan should come on BLK Check for continuity to ground Repair open circuit to body ground WHT YEL Check for battery voltage Repair open between fuse No 35 and cooling fan control unit BLK YEL Check for battery voltage Repair open in BLK YEL between fuse No 12 and cool ing fan control unit 15 17 Troubleshooting Flow Chart 5 Cooling fan or radiator fan does not run Check fuse 36 or 39 NO Is the fuse OK YES Check the relay of the fan motor that does not run
6. eck connection of GRN wire to blower switch Test blower switch 15 13 Troubleshooting Flow Chart 3 A C compressor does not come on and cooling fans come on YEL BLK RED YEL GRY YEL Disconnect A C compressor clutch relays A and B GRY BLK RED BLK Measure voltage between the RELAY A ear yt RELAY B YEL BLK terminal and body View from wire side ground Repair open in YEL BLK wire be tween relay and fuse box or a blown No 18 fuse lt Is there battery voltage YES Connect a jumper wire between YEL BLK terminal on relay A and RED terminal on relay B Check the A C compressor clutch or thermal protector or an open in RED wire Does the A C compressor come on YES Inspect the compressor clutch relays A and B lt Are the relays OK gt No Replace the relay s E YES Check for continuity on the GRY terminal between relays A and B Repair open GRY wire between Is there continuity relays A and B Reconnect relays A and B and remove the A C diodes taped to wire harness under right head light Continued on next page 15 14 Continued from previous page Connect a jumper wire between the RED BLU and BLU RED wire terminals YES lt CDoes the compressor come on gt H Replace the A C diodes CHECK the CCU inputs page 15 9
7. w from wire side NO Repair open in GRN RED wire Does the A C system come on between A C dual pressure YES switch and body ground Connect a jumper wire between GRN RED and GRN terminals YES Does the A C system come on Replace the evaporator sensor NO j Reconnect the evaporator sen sor Continued on next page 15 12 Continued from previous page Disconnect the heater control panel and connect a jumper wire between GRN 1 terminal and GRN 2 GRN 1 body ground View from wire side NO Repair open in GRN 1 wire be lt lt Does the A C system come on tween the evaporator sensor and la the heater control panel Connect a jumper wire between GRN 1 and BLK terminals Repair open in BLK wire between the heater contro panel and body ground NO x Does the A C system come on YES ne Reconnect the control panel Remove A C switch and connec tor BLU ORN view from wire side With switch connected ground the BLU wire Does A C system come on Replace the heater control panel H YES Turn on A C switch and ground the ORN wire Does A C system come on YES Ground GRN 2 at heater control connector Does A C system come on Replace the A C switch Replace the heater contro panel Ch

Troubleshooting

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