Troubleshooting A (a-c)
Contents
1. C108 A T C109 cm c112 c113 114 9 10 GRN BLK YEUGRN war YEL RED BLus RED cRN BLK Q BLK VEL GRN BLK GRNWHT arne BLU WHT L6 RED GRN vet BLKwHT s 10 BL amp YEL c115 C128 A TI C129 A T C130 A T c131 C132 C135 A T GRNBLK erue e enwver amp BLU BLK amp wur RED BLK ren RED YELBLU C216 C217 6218 C220 C220 A T 1 44 2131445 56789 5 7 8 9 1 IGE B18C1 engine Eei amp e m B 1 GRN 6 BLKYEL YELWHT BLK YEL amp RED 1 7 WHT GRN 2 WHT BLU WHT BLU BLU RED G WHT GRN WHT GRN 3 WHT GRN 9 WHT GRN RED WHT RED week WHT BLK 10 BLK RED 5 WHT RED 11 BLUAVHT WHT RED C221 C222 C223 C224 1 213 416617 112 819 10 RED BRN BLK wHTGRN RED BLK LT GRN WHT z WHT BLU ORN BLK GRN BLU amp BLKYEL YEL enna BLU lo G2. PNK IMOLMP IMMOBILIZER INDICATOR LIGHT Drives immobilizer indicator light With immobilizer indicator light turned ON 0 V With immobilizer indicator light turned OFF battery voltage BLU IMOEN IMMOBILIZER ENABLE SIGNAL Sands immobilizer enable signal GRN BLK DAIND D4 INDICATOR Drives 04 indicator light With D4 indicator light turned ON 0 V With D4 indicator light turned OFF battery voltage GRN YEL FLR FUEL PUMP RELAY Drives fuel pump relay 0 V for two seconds after turning ignition switch ON Il then battery voltage BLK RED ACC A C CLUTCH RELAY GRN ORN MIL MALFUNCTION INDICA TOR LIGHT Drives A C clutch relay With compressor ON 0 V With compressor OFF battery voltage Drives MIL With MIL turned ON 0 V With MIL turned OFF battery voltage BLU NEP ENGINE SPEED PULSE Outputs engine speed pulse With engine running pulses GRN FANC RADIATOR FAN CON TROL Drives radiator fan relay With radiator fan running 0 V With radiator fan stopped battery voltage GRN WHT K LINE Sends and receives scan tool signal With ignition switch ON II pulses BLU RED SHO2S SECONDARY HEATED OXYGEN SENSOR SENSOR 2 Detects secondary heated oxygen sensor sensor 2 signal BLU WHT STS STARTER SWITCH SIG NAL Detects starter switch signal With throttle fully opened from
3. PO2SHTC PRIMARY HEATED Drives primary heated oxygen sensor With ignition switch ON 11 battery voltage 1 BRN BLK OXYGEN SENSOR HEATER CON heater With fully warmed up engine running duty controlled TROL xi WHT GRN ALTC ALTERNATOR CONTROL Sends alternator control signal With fully warmed up engine running battery voltage 2 During driving with small electrical load 0 V 3 RED BLU KS KNOCK SENSOR Detects KS signal With engine knocking pulses 5 WHT RED ALTF ALTERNATOR FR SIGNAL Detects alternator FR signal With fully warmed up engine running 0 V battery voltage depending on electrical load 7 GRN WHT 61 SENSOR GROUND Ground for MAP sensor Less than 1 0 V at all times 8 BLU CKPP CKP SENSOR P SIDE Detects CKP sensor With engine running pulses 9 BLU YEL CKPM CKP SENSOR M SIDE Ground for CKP sensor 10 BLU BLK VTM VTEC PRESSURE SWITCH Detects VTEC pressure switch signal With engine at low engine speed 0 V iz SIGNAL With engine at high engine speed battery voltage PHO2S PRIMARY HEATED Detects primary heated oxygen sensor sen With throttle fully opened from idle with fully 16 WHT OXYGEN SENSOR SENSOR 1 sor 1 signal warmed up engine above 0 6 V With throttle quickly closed below 0 4 V 17 WHT YEL MANIFOLD ABSOLUTE PRESSURE SENSOR Detects MAP sensor signal With ignition switch ON ID about 3 V At idle about 1 0 V depending on engine speed 18
4. idle with fully warmed up engine above 0 6 V With throttle quickly closed below 0 4 V With starter switch ON III battery voltage With starter switch OFF 0 V RED INOCD IMMOBILIZER CODE Detects Immobilizer signal GRN PSPSW P S PRESSURE SWITCH SIGNAL Detects PSP switch signal At idle with steering wheel in straight ahead position 0 V At idle with steering wheel at full lock battery voltage BLU RED ACS A C SWITCH SIGNAL Detects A C switch signal With A C switch ON 0 V With A C switch OFF about 5 V WHT RED SLU INTERLOCK CONTROL UNIT Drives interlock control unit With ignition switch ON 11 and brake pedal depressed battery voltage LT GRN PTANK FUEL TANK PRESSURE SENSOR Detects fuel tank pressure sensor signal With ignition switch ON 11 and fuel fill cap opened about 2 5 V 1 USA GRN RED GRN WHT 2 B18C1 engine 3 4 B18C1 B18C5 engines ELD Electrical Load Detector BKSW BRAKE SWITCH Detects ELD signal With parking lights turned on at idle about 2 5 3 5 V With low beam headlights turned on at idle about 1 5 25V Detects brake switch signal With brake pedal released 0 V With brake pedal depressed battery voltage 11 36 00 ITR ECU PLUG a c ECM PCM CONNECTOR B 25P 1 2 3 4 5 8 IGP1 PG1 INJ2 INJ3 INJ4 Ls 9 10 11 12 13 16 17 IGP2 PG2 INJ1 V
5. BLU WHT BLU cu C122 C123 C124 C125 2 1721314 5 6 7 8 amp RED Bru Yew YEUVBLks YEUBLK VEuBLIC YELBLK YEUBLK YEUBLk YEUBLK YEUBLK L veue amp vever C133 C134 C305 C306 C311 B18C1 engine RED BLU BLKYEL YEURED y crn 2 BLK YEL 2 wHTBLU 9 GRN BLUS BLK RED 11 YEL GRN BLK BLU amp YEUBLK BLKYEL 13 GRN BLK ORN 14 YEL WHT GRN B18C1 engine 1 NOTE e Different wires with the same color have been given a number suffix to distinguish them for example YEL BLK and YEL BLK are not the same O Related to Fuel and Emissions System Connector of male terminals View from terminal side Connector of female terminals View from wire side 11 25
6. GRN BLU 562 SENSOR GROUND Sensor ground Less than 1 0 V at all times 19 YEL RED VCC1 SENSOR VOLTAGE Power source to MAP sensor With ignition switch ON Il about 5 V With ignition switch OFF 0 V 20 GRN TDCP TDC SENSOR P SIDE Detects TDC sensor With engine running pulses 21 d WHT BLU TDCM TDC SENSOR M SIDE Ground for TDC sensor 22 BLU RED CKFP CKF SENSOR P SIDE Detects CKF sensor With engine running pulses 23 ORN VSS VEHICLE SPEED SENSOR Detects VSS signal With ignition switch ON 1 and front wheel rotating cycles 0 V about 5 V or battery voltage 25 RED YEL IAT INTAKE AIR TEMPERA TURE SENSOR Detects IAT sensor signal With ignition switch II about 0 1 4 8 V depending on intake air temperature ECT ENGINE COOLANT TEM Detects ECT sensor signal With ignition switch ON II about 0 1 4 8 V 1 USA 2 B18C1 engine 3 A T 4 B18C1 B18C5 engines 11 38 26 RED WHT PERATURE SENSOR depending on engine coolant temperature 27 RED BLK TPS THROTTLE POSITION SEN Detects TP sensor signal With throttle fully open about 4 8 V SOR With throttle fully closed about 0 5 V 28 YEL BLU VCC2 SENSOR VOLTAGE Provides sensor voltage With ignition switch ON 11 about 5 V With ignition switch OFF 0 V 29 YEL CYPP CYP SENSOR P SIDE Detects CYP sensor With engine running pluses 30 WHT CYPM CYP SENS
7. OR M SIDE Ground for CYP sensor 31 WHT RED CKFM CKF SENSOR M SIDE Ground for CKF sensor signal Connector Identification and Wire Harness Routing 00 ITR Engine Harness 1 2 Engine Wire Harness B18C1 B18C5 engine Connector or Terminal Number of Cavities Location Connects to C101 C102 C103 C104 C105 C106 C107 C108 C109 C110 C111 C112 C113 C114 C115 C116 C117 C118 C119 C119 C120 C121 C122 C123 C124 C125 C126 C127 C131 C132 C133 4 10 14 3 1 2 3 4 3 3 2 2 1 4 3 2 2 2 2 2 8 2 zx gt Right side of engine compartment Right side of engine compartment Right side of engine compartment Right side of engine compartment Right side of engine compartment Right side of engine Right side of engine Transmission Middle of engine Middle of engine Right side of engine Right side of engine compartment Middle rear of engine compartment Middle of engine Middle of engine Middle of engine Middle of engine Middle of engine Left side of engine Left side of engine Middle of engine Middle of engine Middle of engine Middle of engine Middle of engine Left side of engine compartment Left side of engine compartment Left side of engine compartment Right side of engine Right side of engine Middle of engine Main wire harness C221 Main wire harness C222 Main wire harness C223 Main wire harness C220 Star
8. RNYEDS YEL BLU Yel 6 BLU VEL BLU RED RED BLU GRN WHT VELIGRN WHT WHT YEL RED YEL B18C1 B18C5 engines YELWHT REDWHT BLU BLK WHT RED3 WHT RED B18B1 engine NOTE e Different wires with the same color have been given a number suffix to distinguish them for example and YEL BLK are not the same O Related to Fuel and Emissions System e Connector of male terminals View from terminal side Connector of female terminals View from wire side cont d 11 23 System Description System Connectors Engine Compartment cont d 00 ITR Engine Harness Plugs 3 4 C120 B18B1 B18C5 engines C124 C120 B18C1 engine C123 C122 C121 C133 C117 B18B1 B18C1 engines C117 18 5 engine 5 2 c116 a O 24 311 CY C134 C119 C110 ENGINE ENGINE WIRE C306 COMPARTMENT HARNESS C127 WIRE C305 HARNESS 11 24 00 ITR Engine Harness Plugs 4 4 e C110 C116 C117 C119 C119 C120 USA CANADA 12 112 EH fts a BLU RED BLK BLU 9 YELBLK 1 amp WHT RED GRN BLK WHT RED 6 vevsue RED YEL WHT GRN 2 BLK VEL RED YEL WHT
9. TS ICM IAB LS soL 20 21 22 23 LG1 VBU 162 lacy Wire side of female terminals PCM CONNECTOR B 25P NOTE Standard battery voltage is 12 V Terminal Wire color Terminal name Description Signal number 1 YEL BLK IGP1 POWER SOURCE Power source for the ECM PCM control cir With ignition switch ON II battery voltage cuit With ignition switch OFF 0 V 2 BLK PG1 POWER GROUND Ground for the ECM PCM control circuit Less than 1 0 V at all times 3 RED INJ2 No 2 FUEL INJECTOR Drives No 2 fuel injector With engine running duty controlled 4 BLU INJ3 No 3 FUEL INJECTOR Drives No 3 fuel injector 5 YEL INJ4 No 4 FUEL INJECTOR Drives No 4 fuel injector LS A T CLUTCH PRESSURE A T clutch pressure control solenoid valve With ignition switch ON II duty controlled 8 3 WHT GRN CONTROL SOLENOID VALVE power supply negative electrode SIDE 9 YEL BLK IGP2 POWER SOURCE Power source for the ECM PCM control circuit With ignition switch ON II battery voltage With ignition switch OFF 0 V 10 BLK PG2 POWER GROUND Ground for the ECM PCM control circuit Less than at all times 11 BRN INJ1 1 FUEL INJECTOR Drives No 1 fuel injector With engine running duty controlled GRN YEL VTS VTEC SOLENOID VALVE Drives VTEC solenoid valve With engine at low rpm 0 V 12 s With engine at high rpm battery voltag
10. Troubleshooting 00 ITR ECU PLUG a c Engine Powertrain Control Module Terminal Arrangement ECM PCM CONNECTOR A 32P ECM PCM CONNECTOR A 32P Terminal number Wire color Terminal name Wire side of female terminals Description 8 4 6 10 5025 VSV PCS nea scs 15 17 18 19 20 21 23 24 FLR ACC MIL NEP FANC K LINE SHO2S STS 26 27 28 29 30 32 PSPSW ACS SLU FTANK ELD BKSW NOTE Standard battery voltage is 12 V Signal 3 BLU 2WBS EVAP BYPASS SOLENOID VALVE Drives EVAP bypass solenoid valve With ignition switch ON 11 battery voltage LT GRN VSV EVAP CONTROL CANISTER VENT SHUT VALVE Drives EVAP control canister vent shut valve With ignition switch ON 11 battery voltage PCS EVAP PURGE CONTROL SOLENOID VALVE Drives EVAP purge control solenoid valve With engine running engine coolant below 154 F 68 C battery voltage With engine running engine coolant above 154 F 68 duty controlled GRN RED SO2SHTC SECONDARY HEAT ED OXYGEN SENSOR HEATER CONTROL Drives secondary heated oxygen sensor heater With ignition switch ON Il battery voltage With fully warmed up engine running duty controlled BRN WHT SCS SERVICE CHECK SIGNAL Detects service check connector signal the signal causing a DTC indication With the terminal connected 0 V With the terminal disconnected about 5 V or battery voltage
11. e ICM IGNITION CONTROL MOD Sends ignition pulse With ignition switch ON 11 battery voltage 13 YEL GRN ULE With engine running pulses IAB SOL INTAKE AIR BYPASS Drives IAB contro solenoid valve With engine running engine speed below 5 750 rpm 16x2 PNK BLU CONTROL SOLENOID VALVE battery voltage With engine running engine speed above 5 750 rpm LS A T CLUTCH PRESSURE A T clutch pressure control solenoid valve With ignition switch ON II duty controlled 17 RED BLU CONTROL SOLENOID VALVE power supply positive electrode SIDE 20 BRN BLK LG1 LOGIC GROUND Ground for the ECM PCM control circuit Less than 1 0 V at all times VBU VOLTAGE BACK UP Power source for the ECM PCM control circuit Battery voltage at this times 21 WHT BLU Power source for the DTC memory 22 BRN BLK LG2 LOGIC GROUND Ground for the ECM PCM control circuit Less than 1 0 V at all times 23 BLK BLU Pe AIR CONTROL Drives IAC valve With engine running duty controlled 1 USA 2 B18C1 engine 3 AIT 4 B18C1 B18C5 engines cont d 11 37 Troubleshooting 00 ITR ECU PLUG C a c Engine Powertrain Control Module Terminal Arrangement cont d ECM PCM CONNECTOR C 31P ECM PCM CONNECTOR C 31P Wire side of female terminals NOTE Standard battery voltage is 12 V Terminal number Wire color Terminal name Description Signal
12. ter solenoid Engine coolant temperature ECT sensor Engine coolant temperature ECT gauge sending unit Back up light switch Distributor Crankshaft speed fluctuation CKF sensor Engine coolant temperature ECT switch Vehicle speed sensor VSS Primary HO2S MAP sensor Throttle position TP sensor Idle air control IAC valve EVAP purge control solenoid valve Engine oil pressure switch Alternator Alternator Intake air temperature IAT sensor No 1 fuel injector No 2 fuel injector No 3 fuel injector No 4 fuel injector Junction connector Engine compartment wire harness C304 Engine compartment wire harness C305 VTEC solenoid valve VTEC oil pressure switch Knock sensor KS USA Canada T101 T102 Left side of engine Right side of engine compartment Alternator Under hood fuse relay box G101 23 6 Right side of engine Engine ground via engine wire harness 00 ITR Engine Harness 2 2 j LA Re S ENGINE WIRE HARNESS B18C1 B18C5 engine C126 C119 C125 C117 C113 114 egre 112 120 ez 23 7 System Description System Connectors Engine Compartment 00 ITR Engine Harness Plugs 1 4 ENGINE WIRE HARNESS UNDER C218 MAIN D Ct WIRE 7 HOOD FUSE RELAY HARNESS BOX 6128 222 224 C135 11 22 00 ITR Engine Harness Plugs 2 4
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