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Engine Control System & Component Tests: Other GMC Sonoma II

Testing & Diagnostics ~4400 words

AIR INDUCTION SYSTEMS

Note. Manufacturer does not provide testing procedures for many individual systems and components. For system and component testing not listed, perform related DTC testing procedure. See appropriate SELF-DIAGNOSTICS article.

TURBOCHARGER (6.5L DIESEL)

A malfunction in turbocharger boost system can set a related Diagnostic Trouble Code (DTC). For testing procedures, see appropriate SELF-DIAGNOSTICS article.

PCM POWER & GROUND CHECK

Note. To identify circuits referenced in the following ground and power tests, see appropriate wiring diagram in WIRING DIAGRAMS article.

Ground Circuits

  1. Using an ohmmeter, check for continuity to ground at PCM/VCM ground terminals. See «POWERTRAIN CONTROL MODULE (PCM) CONNECTOR TERMINAL IDENTIFICATION»(ref-177-S37492553702000030800000). (Схема №1)- (Схема №4). Resistance should be zero ohms. If not, repair open to ground.
  2. Using a voltmeter, connect negative lead of a voltmeter to a good ground. Backprobe positive lead of voltmeter to each ground terminal. With vehicle running, voltmeter should indicate less than one volt. If voltmeter reading is more than one volt, check for open, short to voltage, corrosion or loose connection on ground circuit.

Power Circuits

  1. Using a voltmeter, check for battery voltage between PCM/VCM continuous power terminal(s) and ground. See «POWERTRAIN CONTROL MODULE (PCM) CONNECTOR TERMINAL IDENTIFICATION»(ref-177-S37492553702000030800000). (Схема №1)- (Схема №4). If battery voltage is not present, check for blown fuse or open fusible link. If okay, check for open in wire between PCM/VCM terminal and power source.
  2. Turn ignition switch to RUN position. Using a voltmeter, check for battery voltage between PCM/VCM ignition power terminals and ground. If battery voltage is not present, check IGN fuse. If fuse is okay, check for an open in wire between battery and ignition switch, and between ignition switch and PCM/VCM terminal. If wiring is okay, check for a defective ignition switch.
  3. Connect voltmeter between ground and PCM/VCM starter (crank) signal terminal. On vehicles with manual transmission/transaxle, depress clutch pedal. On vehicles with automatic transmission/transaxle, position gear shift lever in Park. On all vehicles, turn ignition switch to START position. Battery voltage should be present ONLY when ignition switch is in START position.
  4. If voltage is not present, check CRANK fuse or fusible link between ignition switch and PCM/VCM terminal. If fuse or fusible link is okay, check for an open in wire between ignition switch and PCM/VCM terminal, or check for a defective ignition switch.

POWERTRAIN CONTROL MODULE (PCM) - 2.2L

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1-5—Not Used
C1 (Blue)6ORG/BLK(2) Ground
C1 (Blue)7BRN/WHTCMP Sensor Signal
C1 (Blue)8PPL/WHTCKP 7x Reference Signal
C1 (Blue)9—Not Used
C1 (Blue)10GRYFuel Tank Pressure Sensor Reference Voltage
C1 (Blue)11-17—Not Used
C1 (Blue)180BLK/WHTPCM Ground
C1 (Blue)19PNKIgnition Voltage
C1 (Blue)20ORNBattery Voltage
C1 (Blue)21DK BLUTP Sensor Signal
C1 (Blue)22-24—Not Used
C1 (Blue)25ORNIgnition Control B
C1 (Blue)26WHTIgnition Control A
C1 (Blue)27—Not Used
C1 (Blue)28REDTransmission Range C Input
C1 (Blue)29BLK/WHTPRNDL A Input
C1 (Blue)30-32—Not Used
C1 (Blue)33DK BLUKS Signal
C1 (Blue)34—Not Used
C1 (Blue)35PPLTCC Brake Switch Input
C1 (Blue)36LT BLUA/C Request Signal
C1 (Blue)37-44—Not Used
C1 (Blue)45DK GRNFuel Tank Pressure Sensor Signal
C1 (Blue)46YEL/BLKTFT Sensor Signal
C1 (Blue)47 & 48—Not Used
C1 (Blue)49RED/BLKA/C Refrigerant Pressure Sensor Signal
C1 (Blue)50 & 51—Not Used
C1 (Blue)52BLKA/C Refrigerant Pressure Sensor Ground
C1 (Blue)53—Not Used
C1 (Blue)54YELECT Sensor Signal
C1 (Blue)55PPLFuel Level Sensor Input
C1 (Blue)56—Not Used
C1 (Blue)57BLKTP Sensor Ground
C1 (Blue)58YELSerial Data (Class II)
C1 (Blue)59DK GRNSerial Data (Class II)
C1 (Blue)60BLK/WHTPCM Ground
C1 (Blue)61PNKIGN 2
C1 (Blue)62LT GRNMAP Sensor Signal
C1 (Blue)63PPL/WHTVSS High
C1 (Blue)64-66—Not Used
C1 (Blue)67DK BLUTransmission Range B Input
C1 (Blue)68PNKTransmission Range A Input
C1 (Blue)69YELPRNDL B
C1 (Blue)70YEL/BLKHigh Resolution Vehicle Speed Output
C1 (Blue)71—Not Used
C1 (Blue)72GRYPRNDL C
C1 (Blue)73WHTPRNDL P
C1 (Blue)74REDGenerator Terminal L
C1 (Blue)75BLKFuel Injector No. 1 Control
C1 (Blue)76LT GRN/BLKFuel Injector No. 2 Control
C1 (Blue)77-80—Not Used
C2 (Red)1-5—Not Used
C2 (Red)6RED/BLKPressure Control Solenoid High Control
C2 (Red)7—Not Used
C2 (Red)8DK GRN/WHTFuel Pump Relay Control
C2 (Red)9LT BLU/WHTPressure Control Solenoid Low Control
C2 (Red)10WHTTachometer Output
C2 (Red)11-13—Not Used
C2 (Red)14BLK/WHTMAP Sensor Ground
C2 (Red)15—Not Used
C2 (Red)16DK GRN/WHTVSS Output (Cruise)
C2 (Red)17DK GRNVSS Output (Cluster)
C2 (Red)18 & 19—Not Used
C2 (Red)20TANIAT Sensor Signal
C2 (Red)21TANHO2S 1 Low
C2 (Red)22PPLHO2S 1 Signal
C2 (Red)23TAN/WHTHO2S 2 Low
C2 (Red)24PPL/WHTHO2S 2 Signal
C2 (Red)25 & 26—Not Used
C2 (Red)27BRNECT Sensor Ground
C2 (Red)28GRYIAT Sensor Ground
C2 (Red)29BLKTFT Sensor Ground
C2 (Red)30—Not Used
C2 (Red)31RED/BLKICM Reference Low
C2 (Red)32—Not Used
C2 (Red)33GRYTP Sensor Reference Voltage
C2 (Red)34GRYA/C Refrigerant Pressure Sensor Reference Voltage
C2 (Red)35GRYMAP Sensor Reference Voltage
C2 (Red)36REDCMP Sensor Battery Voltage Supply
C2 (Red)37-45—Not Used
C2 (Red)46BRN/WHTMIL Control
C2 (Red)47—Not Used
C2 (Red)48LT BLU/BLKCruise Engaged Input
C2 (Red)49—Not Used
C2 (Red)50TAN/BLKTCC Solenoid Control
C2 (Red)51YEL/BLK2-3 Shift Solenoid Control
C2 (Red)52WHT3-2 Shift Solenoid Control
C2 (Red)53LT GRN1-2 Shift Solenoid Control
C2 (Red)54—Not Used
C2 (Red)55DK GRN/WHTA/C Compressor Clutch Relay Control
C2 (Red)56DK GRN/WHTEVAP Canister Purge Valve Control
C2 (Red)57BRNTCC PWM Solenoid Control
C2 (Red)58WHTEVAP Canister Vent Solenoid Control
C2 (Red)59-61—Not Used
C2 (Red)62LT GRN/BLKVSS Low
C2 (Red)63PNK/BLKCMP Sensor Ground
C2 (Red)64BLK/WHTPCM Ground
C2 (Red)65-70—Not Used
C2 (Red)71LT BLU/WHTIAC Coil A High
C2 (Red)72LT GRN/WHTIAC Coil B High
C2 (Red)73LT GRN/BLKIAC Coil B Low
C2 (Red)74LT BLU/BLKIAC Coil A Low
C2 (Red)75LT BLU/BLKFuel Injector No. 4 Control
C2 (Red)76PNK/BLKFuel Injector No. 3 Control
C2 (Red)77-80—Not Used
(1) (Схема №1) (2) Fuel tank pressure sensor, fuel level sensor and fuel pump grounds.
(1)(Схема №1)
(2)Fuel tank pressure sensor, fuel level sensor and fuel pump grounds.

POWERTRAIN CONTROL MODULE (PCM) - 2.2L (1)

POWERTRAIN CONTROL MODULE (PCM) - 3.4L

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1 & 2—Not Used
C1 (Blue)3ORGFuel Level Output
C1 (Blue)4LT GRNShift Solenoid A Control
C1 (Blue)5DK BLUCooling Fan High Speed Control
C1 (Blue)6DK GRNCooling Fan Low Speed Control
C1 (Blue)7BLKCamshaft Position PCM Input
C1 (Blue)8PPL/WHTCKP 3x Reference Signal
C1 (Blue)9LT BLU/BLKCKP 24x Reference Signal
C1 (Blue)10 & 11—Not Used
C1 (Blue)12BLKEngine Coolant Temperature Sensor Ground
C1 (Blue)13ORG/BLKManifold Absolute Pressure Sensor Ground
C1 (Blue)14—Not Used
C1 (Blue)15TANSerial Data
C1 (Blue)16BLK/WHTPCM Ground
C1 (Blue)17YELIntake Air Temperature Sensor Ground
C1 (Blue)18—Not Used
C1 (Blue)19PNKIgnition Voltage
C1 (Blue)20ORGBattery Voltage
C1 (Blue)21-27—Not Used
C1 (Blue)28TAN/WHTHO2S Sensor 2 Signal Low
C1 (Blue)29TANHO2S Sensor 1 Signal Low
C1 (Blue)30PPLTCC Brake Switch
C1 (Blue)31BLKEGR Valve Ground
C1 (Blue)32GRYEGR Valve Ground
C1 (Blue)33DK BLUKnock Sensor Signal
C1 (Blue)34 & 35—Not Used
C1 (Blue)36BRNGenerator Light Signal
C1 (Blue)37—Not Used
C1 (Blue)38LT GRN/WHTIdle Air Control B High
C1 (Blue)39-42—Not Used
C1 (Blue)43BLKFuel Injector No. 1 Control
C1 (Blue)44YEL/BLKShift Solenoid B Control
C1 (Blue)45—Not Used
C1 (Blue)46PNK/BLKFuel Injector No. 3 Control
C1 (Blue)47LT GRN/BLKFuel Injector No. 2 Control
C1 (Blue)48RED/BLKReference Low
C1 (Blue)49-52—Not Used
C1 (Blue)53TAN/BLKBy-Pass
C1 (Blue)54WHTIgnition Control
C1 (Blue)55DK GRN4k Pulse Per Mile
C1 (Blue)56BLK/WHTPCM Ground
C1 (Blue)57BLK/WHTPCM Ground
C1 (Blue)58—Not Used
C1 (Blue)59PPLSerial Data (Class 2)
C1 (Blue)60BLK/WHTPCM Ground
C1 (Blue)61PPLTP Sensor Ground
C1 (Blue)62 & 63—Not Used
C1 (Blue)64YELVehicle Speed Sensor High
C1 (Blue)65PPLVehicle Speed Sensor Low
C1 (Blue)66 & 67—Not Used
C1 (Blue)68YELTransaxle Range Switch Input B
C1 (Blue)69YELMass Airflow Signal
C1 (Blue)70DK BLUTheft Deterrent Input
C1 (Blue)71ORG/BLKRequired Torque
C1 (Blue)72DK GRNCruise Control Inhibit
C1 (Blue)73BLK/WHTFuel Injector No. 5 Control
C1 (Blue)74—Not Used
C1 (Blue)75DK GRNEngine Hot Light Control
C1 (Blue)76DK GRN/WHTEVAP Canister Purge Control
C1 (Blue)77 & 78—Not Used
C1 (Blue)79YEL/BLKFuel Injector No. 6 Control
C1 (Blue)80—Not Used
C2 (Red)1—Not Used
C2 (Red)2WHTEVAP Canister Vent Valve Control
C2 (Red)3DK GRN/WHTFuel Pump Relay Control
C2 (Red)4REDEGR Valve Control
C2 (Red)5BRN/WHTMIL Control
C2 (Red)6BRN/WHTLow Oil Level Light Control
C2 (Red)7LT BLU/WHTIntake Air Control A High
C2 (Red)8WHTTachometer Output
C2 (Red)9TAN/BLKDelivered Torque
C2 (Red)10PPLHO2S Sensor 1 Signal High
C2 (Red)11PPL/WHTHO2S Sensor 2 Signal High
C2 (Red)12-15—Not Used
C2 (Red)16WHTTransaxle Range P
C2 (Red)17—Not Used
C2 (Red)18BLK/WHTTransaxle Range D
C2 (Red)19-21—Not Used
C2 (Red)22DK GRN/WHTA/C Request Signal
C2 (Red)23 & 24—Not Used
C2 (Red)25LT GRNMAP Sensor Signal
C2 (Red)26YELECT Sensor Signal
C2 (Red)27RED/BLKA/C Refrigerant Pressure Sensor Signal
C2 (Red)28BRNEGR Pintle Position Signal
C2 (Red)29-32—Not Used
C2 (Red)33GRYReference Voltage A
C2 (Red)34GRYReference Voltage B
C2 (Red)35ORGSensor Ground
C2 (Red)36-38—Not Used
C2 (Red)39DK GRN/WHTA/C Compressor Clutch Relay Control
C2 (Red)40 & 41—Not Used
C2 (Red)42LT BLU/BLKFuel Injector No. 4 Control
C2 (Red)43—Not Used
C2 (Red)44LT BLU/BLKIntake Air Control Valve A Low
C2 (Red)45-48—Not Used
C2 (Red)49LT GRN/BLKIntake Air Control Valve B Low
C2 (Red)50TANIntake Air Temperature Sensor Signal
C2 (Red)51-54—Not Used
C2 (Red)55DK GRNFuel Tank Pressure Sensor Signal
C2 (Red)56GRYTransaxle Range C
C2 (Red)57—Not Used
C2 (Red)58BRNEngine Oil Level Sensor Signal
C2 (Red)59WHTCruise Status
C2 (Red)60—Not Used
C2 (Red)61REDGenerator Control
C2 (Red)62-65—Not Used
C2 (Red)66DK BLUThrottle Position Sensor Signal
C2 (Red)67—Not Used
C2 (Red)68YEL/BLKTransaxle Fluid Temperature Sensor
C2 (Red)69PPLFuel Level Input
C2 (Red)70 & 71—Not Used
C2 (Red)72RED/WHTCMP Sensor Ignition Voltage
C2 (Red)73BLKCMP Sensor Ground
C2 (Red)74-77—Not Used
C2 (Red)78BRNTCC PWM Solenoid Control
C2 (Red)79TAN/BLKTCC Enable Solenoid
C2 (Red)80—Not Used
(1) (Схема №2)
(1)(Схема №2)

POWERTRAIN CONTROL MODULE (PCM) - 3.4L (1)

POWERTRAIN CONTROL MODULE (PCM) - 4.3L ("G" SERIES)

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1 & 2—Not Used
C1 (Blue)3BRN/WHTCMP Sensor 1x Signal
C1 (Blue)4-6—Not Used
C1 (Blue)7TANHO2S Bank 2 Sensor 1 Low
C1 (Blue)8PNK/BLKCMP Sensor Ground
C1 (Blue)9PPLFuel Level Output
C1 (Blue)10TAN/BLKTCC Solenoid Control
C1 (Blue)11 & 12—Not Used
C1 (Blue)13WHT3-2 Shift Solenoid Valve Control
C1 (Blue)14—Not Used
C1 (Blue)15YEL/BLKVSS Output
C1 (Blue)16-18—Not Used
C1 (Blue)19PPL/WHTHO2S Bank 1 Sensor 1 High
C1 (Blue)20—Not Used
C1 (Blue)21PPLHO2S Bank 2 Sensor 1 High
C1 (Blue)22PPL/WHTHO2S Bank 1 Sensor 3 High
C1 (Blue)23 & 24—Not Used
C1 (Blue)25TAN/WHTHO2S Bank 1 Sensor 1 Low
C1 (Blue)26TAN/WHTHO2S Bank 1 Sensor 3 Low
C1 (Blue)27—Not Used
C1 (Blue)28PPLCKP Sensor Ground
C1 (Blue)29LT GRN/BLKVSS Low
C1 (Blue)30PPL/WHTVSS High
C1 (Blue)31YELCKP Sensor 3x Signal
C1 (Blue)32—Not Used
C2 (Red)1—Not Used
C2 (Red)2WHTEVAP Canister Vent Solenoid Control
C2 (Red)3—Not Used
C2 (Red)4YEL/BLK2-3 Shift Solenoid Valve Control
C2 (Red)5—Not Used
C2 (Red)6LT GRN1-2 Shift Solenoid Valve Control
C2 (Red)7BRNTCC PWM Solenoid Valve Control
C2 (Red)8BLKFuel Injector No. 1 Control
C2 (Red)9YEL/BLKFuel Injector No. 6 Control
C2 (Red)10BRNEGR Pintle Position Signal
C2 (Red)11 & 12—Not Used
C2 (Red)13LT GRN/WHTIAC Coil B High
C2 (Red)14LT BLU/WHTIAC Coil A High
C2 (Red)15LT GRN/BLKFuel Injector No. 2 Control
C2 (Red)16PNK/BLKFuel Injector No. 3 Control
C2 (Red)17 & 18—Not Used
C2 (Red)19DK BLUKS Signal
C2 (Red)20—Not Used
C2 (Red)21LT GRNMAP Sensor Signal
C2 (Red)22TANIAT Sensor Signal
C2 (Red)23YELECT Sensor Signal
C2 (Red)24DK BLUTP Sensor Signal
C2 (Red)25DK GRNFuel Tank Pressure Sensor Signal
C2 (Red)26—Not Used
C2 (Red)27YEL/BLKTFT Sensor Signal
C2 (Red)28YELMAF Sensor Signal
C2 (Red)29LT GRN/BLKIAC Coil B Low
C2 (Red)30LT BLU/BLKIAC Coil A Low
C2 (Red)31BLK/WHTFuel Injector No. 5 Control
C2 (Red)32LT BLU/BLKFuel Injector No. 4 Control
C3 (Clear)1DK GRN/WHTA/C Compressor Clutch Relay Control
C3 (Clear)2DK GRN/WHTEVAP Canister Purge Solenoid Control
C3 (Clear)3—Not Used
C3 (Clear)4BLKSensor Ground
C3 (Clear)5—Not Used
C3 (Clear)6RED/BLKPressure Control Solenoid Valve High
C3 (Clear)7 & 8—Not Used
C3 (Clear)9WHTIC Control
C3 (Clear)10—Not Used
C3 (Clear)11REDTransmission Range C Input
C3 (Clear)12GRYSensor Reference Voltage
C3 (Clear)13PPLFuel Level Sensor Signal
C3 (Clear)14 & 15—Not Used
C3 (Clear)16LT BLU/WHTPressure Control Solenoid Valve Low
C3 (Clear)17TAN/WHTVCM Ground
C3 (Clear)18TAN/WHTVCM Ground
C3 (Clear)19BLKSensor Ground
C3 (Clear)20—Not Used
C3 (Clear)21ORGBattery Voltage
C3 (Clear)22DK BLUTransmission Range B Input
C3 (Clear)23PNKTransmission Range A Input
C3 (Clear)24—Not Used
C3 (Clear)25GRN/WHTA/C Request Signal
C3 (Clear)26WHTPRNDL P
C3 (Clear)27GRYReference Voltage
C3 (Clear)28GRYPRNDL C
C3 (Clear)29—Not Used
C3 (Clear)30DK GRNA/C Cycling Switch Signal
C3 (Clear)31BLK/WHTPRNDL A
C3 (Clear)32YELPRNDL B
C4 (Black)1DK GRN/WHTFuel Pump Relay Control
C4 (Black)2—Not Used
C4 (Black)3DK GRN/WHTVSS Output
C4 (Black)4DK GRNVSS Output
C4 (Black)5BRN/WHTMIL Control
C4 (Black)6-9—Not Used
C4 (Black)10PPLBrake Switch Input
C4 (Black)11PPLSerial Data (Class II)
C4 (Black)12—Not Used
C4 (Black)13BRNIgnition Voltage
C4 (Black)14 & 15—Not Used
C4 (Black)16REDEGR Valve Control
C4 (Black)17—Not Used
C4 (Black)18PNKIgnition Voltage
C4 (Black)19—Not Used
C4 (Black)20WHTEGR Valve Ground
C4 (Black)21-23—Not Used
C4 (Black)24LT BLU/BLKCruise Engaged Input
(1) (Схема №3)
(1)(Схема №3)

POWERTRAIN CONTROL MODULE (PCM) - 4.3L ("G" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 4.3L ("L" & "M" SERIES)

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1 & 2—Not Used
C1 (Blue)3BRN/WHTCMP Sensor 1x Signal
C1 (Blue)4-6—Not Used
C1 (Blue)7TANHO2S Bank 2 Sensor 1 Low
C1 (Blue)8PNK/BLKCMP Sensor Ground
C1 (Blue)9PPLFuel Level Output
C1 (Blue)10TAN/BLKTCC Solenoid Control
C1 (Blue)11 & 12—Not Used
C1 (Blue)13WHT3-2 Shift Solenoid Valve Control
C1 (Blue)14—Not Used
C1 (Blue)15YEL/BLKVSS Output
C1 (Blue)16-18—Not Used
C1 (Blue)19PPL/WHTHO2S Bank 1 Sensor 1 High
C1 (Blue)20—Not Used
C1 (Blue)21PPLHO2S Bank 2 Sensor 1 High
C1 (Blue)22PPL/WHTHO2S Bank 1 Sensor 3 High
C1 (Blue)23—Not Used
C1 (Blue)24TAN/WHTHO2S Bank 2 Sensor 1 Low
C1 (Blue)25TAN/WHTHO2S Bank 1 Sensor 1 Low
C1 (Blue)26TAN/WHTHO2S Bank 1 Sensor 3 Low
C1 (Blue)27—Not Used
C1 (Blue)28PPLCKP Sensor Ground
C1 (Blue)29LT GRN/BLKVSS Low
C1 (Blue)30PPL/WHTVSS High
C1 (Blue)31YELCKP Sensor 3x Signal
C1 (Blue)32—Not Used
C2 (Red)1—Not Used
C2 (Red)2WHTEVAP Canister Vent Solenoid Control
C2 (Red)3—Not Used
C2 (Red)4YEL/BLK2-3 Shift Solenoid Valve Control
C2 (Red)5—Not Used
C2 (Red)6LT GRN1-2 Shift Solenoid Valve Control
C2 (Red)7BRNTCC PWM Solenoid Control
C2 (Red)8BLKFuel Injector No. 1 Control
C2 (Red)9YEL/BLKFuel Injector No. 6 Control
C2 (Red)10BRNEGR Pintle Position Signal
C2 (Red)11 & 12—Not Used
C2 (Red)13LT GRN/WHTIAC Coil B High
C2 (Red)14LT BLU/WHTIAC Coil A High
C2 (Red)15LT GRN/BLKFuel Injector No. 2 Control
C2 (Red)16PNK/BLKFuel Injector No. 3 Control
C2 (Red)17 & 18—Not Used
C2 (Red)19DK BLUKS Signal
C2 (Red)20—Not Used
C2 (Red)21LT GRNMAP Sensor Signal
C2 (Red)22TANIAT Sensor Signal
C2 (Red)23YELECT Sensor Signal
C2 (Red)24DK BLUTP Sensor Signal
C2 (Red)25DK GRNFuel Tank Pressure Sensor Signal
C2 (Red)26TAN/WHTHO2S Bank 1 Sensor 1 Low
C2 (Red)27YEL/BLKTFT Sensor Signal
C2 (Red)28YELMAF Sensor Signal
C2 (Red)29LT GRN/BLKIAC Coil B Low
C2 (Red)30LT BLU/BLKIAC Coil A Low
C2 (Red)31BLK/WHTFuel Injector No. 5 Control
C2 (Red)32LT BLU/BLKFuel Injector No. 4 Control
C3 (Clear)1DK GRN/WHTA/C Compressor Clutch Relay Control
C3 (Clear)2DK GRN/WHTEVAP Canister Purge Solenoid Control
C3 (Clear)3—Not Used
C3 (Clear)4BLKSensor Ground
C3 (Clear)5—Not Used
C3 (Clear)6RED/BLKPressure Control Solenoid High
C3 (Clear)7 & 8—Not Used
C3 (Clear)9WHTIC Control
C3 (Clear)10—Not Used
C3 (Clear)11REDTransmission Range C Input
C3 (Clear)12GRYSensor Reference Voltage
C3 (Clear)13PPL/WHTFuel Level Sensor Signal
C3 (Clear)14 & 15—Not Used
C3 (Clear)16LT BLU/WHTPressure Control Solenoid Low
C3 (Clear)17BLK/WHTVCM Ground
C3 (Clear)18BLK/WHTVCM Ground
C3 (Clear)19BLKSensor Ground
C3 (Clear)20—Not Used
C3 (Clear)21ORGBattery Voltage
C3 (Clear)22DK BLUTransmission Range B Input
C3 (Clear)23PNKTransmission Range A Input
C3 (Clear)24—Not Used
C3 (Clear)25GRN/WHTA/C Request Signal
C3 (Clear)26WHTPRNDL P
C3 (Clear)27GRYReference Voltage
C3 (Clear)28GRYPRNDL C
C3 (Clear)29—Not Used
C3 (Clear)30DK GRNA/C Cycling Switch Signal
C3 (Clear)31BLK/WHTPRNDL A
C3 (Clear)32YELPRNDL B
C4 (Black)1DK GRN/WHTFuel Pump Relay Control
C4 (Black)2—Not Used
C4 (Black)3DK GRN/WHTVSS Output
C4 (Black)4DK GRNVSS Output
C4 (Black)5BRN/WHTMIL Control
C4 (Black)6-9—Not Used
C4 (Black)10PPLBrake Switch Input
C4 (Black)11PPLSerial Data (Class II)
C4 (Black)12TAN/WHTHO2S Bank 1 Sensor 3 Low
C4 (Black)13BRNIgnition Voltage
C4 (Black)14YELSerial Data (Class II)
C4 (Black)15—Not Used
C4 (Black)16REDEGR Valve Control
C4 (Black)17PNKIgnition Voltage
C4 (Black)18PNKIgnition Voltage
C4 (Black)19—Not Used
C4 (Black)20WHTEGR Valve Ground
C4 (Black)21-23—Not Used
C4 (Black)24LT BLU/BLKCruise Engaged Input
(1) (Схема №3)
(1)(Схема №3)

POWERTRAIN CONTROL MODULE (PCM) - 4.3L ("L" & "M" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 4.3L ("P" SERIES)

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1 & 2—Not Used
C1 (Blue)3BRN/WHTCMP Sensor 1x Signal
C1 (Blue)4PNKIgnition Voltage
C1 (Blue)5 & 6—Not Used
C1 (Blue)7TANHO2S Bank 2 Sensor 1 Low
C1 (Blue)8PNK/BLKCMP Sensor Ground
C1 (Blue)9PPLFuel Level Signal
C1 (Blue)10-14—Not Used
C1 (Blue)15YEL/BLKVSS Output
C1 (Blue)16-18—Not Used
C1 (Blue)19PPL/WHTHO2S Bank 1 Sensor 1 High
C1 (Blue)20—Not Used
C1 (Blue)21PPLHO2S Bank 2 Sensor 1 High
C1 (Blue)22PPL/WHTHO2S Bank 1 Sensor 3 High
C1 (Blue)23 & 24—Not Used
C1 (Blue)25TAN/WHTHO2S Bank 1 Sensor 1 Low
C1 (Blue)26TAN/WHTHO2S Bank 1 Sensor 3 Low
C1 (Blue)27—Not Used
C1 (Blue)28PPLCKP Sensor Ground
C1 (Blue)29LT GRN/BLKVSS Low
C1 (Blue)30PPL/WHTVSS High
C1 (Blue)31YELCKP Sensor 4x Signal
C1 (Blue)32—Not Used
C2 (Red)1—Not Used
C2 (Red)2WHTEVAP Canister Vent Solenoid Control
C2 (Red)3—Not Used
C2 (Red)4YEL/BLK2-3 Shift Solenoid Control
C2 (Red)5—Not Used
C2 (Red)6LT GRN1-2 Shift Solenoid Control
C2 (Red)7BRNTCC PWM Solenoid Control
C2 (Red)8BLKFuel Injector No. 1 Control
C2 (Red)9YEL/BLKFuel Injector No. 6 Control
C2 (Red)10BRNEGR Pintle Position Signal
C2 (Red)11 & 12—Not Used
C2 (Red)13LT GRN/WHTIAC Coil B High
C2 (Red)14LT BLU/WHTIAC Coil A High
C2 (Red)15LT GRN/BLKFuel Injector No. 2 Control
C2 (Red)16PNK/BLKFuel Injector No. 3 Control
C2 (Red)17 & 18—Not Used
C2 (Red)19DK BLUKS Signal
C2 (Red)20—Not Used
C2 (Red)21LT GRNMAP Sensor Signal
C2 (Red)22TANIAT Sensor Signal
C2 (Red)23YELECT Sensor Signal
C2 (Red)24DK BLUTP Sensor Signal
C2 (Red)25DK GRNFuel Tank Pressure Sensor Signal
C2 (Red)26—Not Used
C2 (Red)27YEL/BLKTFT Sensor Signal
C2 (Red)28YELMAF Sensor Signal
C2 (Red)29LT GRN/BLKIAC Coil B Low
C2 (Red)30LT BLU/BLKIAC Coil A Low
C2 (Red)31BLK/WHTFuel Injector No. 5 Control
C2 (Red)32LT BLU/BLKFuel Injector No. 4 Control
C3 (Clear)1DK GRN/WHTA/C Compressor Clutch Relay Control
C3 (Clear)2DK GRN/WHTEVAP Canister Purge Solenoid Control
C3 (Clear)3—Not Used
C3 (Clear)4BLKECT/TP Sensor Ground
C3 (Clear)5—Not Used
C3 (Clear)6RED/BLKPressure Control Solenoid High
C3 (Clear)7BLU/WHTInput Shaft Speed Sensor Low
C3 (Clear)8RED/BLKInput Shaft Speed Sensor High
C3 (Clear)9WHTIC Control
C3 (Clear)10—Not Used
C3 (Clear)11REDTransmission Range C Signal
C3 (Clear)12GRYTP Sensor Reference Voltage
C3 (Clear)13PPLFuel Level Input Signal
C3 (Clear)14 & 15—Not Used
C3 (Clear)16LT BLU/WHTPressure Control Solenoid Low
C3 (Clear)17BLK/WHTPCM Ground
C3 (Clear)18BLK/WHTPCM Ground
C3 (Clear)19BLKSensor Ground
C3 (Clear)20—Not Used
C3 (Clear)21ORGBattery Voltage
C3 (Clear)22DK BLUTransmission Range B Signal
C3 (Clear)23PNKTransmission Range A Signal
C3 (Clear)24—Not Used
C3 (Clear)25DK GRN/WHTA/C Request Signal
C3 (Clear)26—Not Used
C3 (Clear)27GRYReference Voltage (EGR/MAP)
C3 (Clear)28 & 29—Not Used
C3 (Clear)30DK GRNA/C Signal
C3 (Clear)31 & 32—Not Used
C4 (Black)1DK GRN/WHTFuel Pump Relay Control
C4 (Black)2 & 3—Not Used
C4 (Black)4DK GRNVSS Output (Speedometer)
C4 (Black)5BRN/WHTMIL Control
C4 (Black)6-9—Not Used
C4 (Black)10PPLBrake Signal
C4 (Black)11PPLSerial Data (Class II)
C4 (Black)12—Not Used
C4 (Black)13BRNIgnition Voltage
C4 (Black)14 & 15—Not Used
C4 (Black)16REDEGR Valve Control
C4 (Black)17—Not Used
C4 (Black)18PNKIgnition Voltage
C4 (Black)19—Not Used
C4 (Black)20WHTEGR Valve Ground
C4 (Black)21-24—Not Used
(1) (Схема №3)
(1)(Схема №3)

POWERTRAIN CONTROL MODULE (PCM) - 4.3L ("P" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 4.3L ("S" & "T" SERIES)

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1 & 2—Not Used
C1 (Blue)3BRN/WHTCMP Sensor 1x Signal
C1 (Blue)4-6—Not Used
C1 (Blue)7TANHO2S Bank 2 Sensor 1 Low
C1 (Blue)8PNK/BLKCMP Sensor Ground
C1 (Blue)9—Not Used
C1 (Blue)10TAN/BLKTCC Solenoid Control
C1 (Blue)11 & 12—Not Used
C1 (Blue)13WHT3-2 Shift Solenoid Control
C1 (Blue)14BRNAIR Pump Relay Control
C1 (Blue)15YEL/BLKVSS Output
C1 (Blue)16-18—Not Used
C1 (Blue)19PPL/WHTHO2S Bank 1 Sensor 1 High
C1 (Blue)20—Not Used
C1 (Blue)21PPLHO2S Bank 2 Sensor 1 High
C1 (Blue)22PPL/WHTHO2S Bank 1 Sensor 2 High
C1 (Blue)23 & 24—Not Used
C1 (Blue)25TAN/WHTHO2S Bank 1 Sensor 1 Low
C1 (Blue)26TAN/WHTHO2S Bank 1 Sensor 2 Low
C1 (Blue)27—Not Used
C1 (Blue)28PPLCKP Sensor Ground
C1 (Blue)29LT GRN/BLKVSS Low
C1 (Blue)30PPL/WHTVSS High
C1 (Blue)31YELCKP Sensor 3x Signal
C1 (Blue)32—Not Used
C2 (Red)1—Not Used
C2 (Red)2WHTEVAP Canister Vent Solenoid Control
C2 (Red)3—Not Used
C2 (Red)4YEL/BLK2-3 Shift Solenoid Control
C2 (Red)5—Not Used
C2 (Red)6LT GRN1-2 Shift Solenoid Control
C2 (Red)7BRNTCC PWM Solenoid Control
C2 (Red)8BLKFuel Injector No. 1 Control
C2 (Red)9YEL/BLKFuel Injector No. 6 Control
C2 (Red)10BRNEGR Pintle Position Signal
C2 (Red)11 & 12—Not Used
C2 (Red)13LT GRN/WHTIAC Coil B High
C2 (Red)14LT BLU/WHTIAC Coil A High
C2 (Red)15LT GRN/BLKFuel Injector No. 2 Control
C2 (Red)16PNK/BLKFuel Injector No. 3 Control
C2 (Red)17 & 18—Not Used
C2 (Red)19DK BLUKS Signal
C2 (Red)20WHTTachometer Output
C2 (Red)21LT GRNMAP Sensor Signal
C2 (Red)22TANIAT Sensor Signal
C2 (Red)23YELECT Sensor Signal
C2 (Red)24DK BLUTP Sensor Signal
C2 (Red)25DK GRNFuel Tank Pressure Sensor Signal
C2 (Red)26—Not Used
C2 (Red)27YEL/BLKTFT Sensor Signal
C2 (Red)28YELMAF Sensor Signal
C2 (Red)29LT GRN/BLKIAC Coil B Low
C2 (Red)30LT BLU/BLKIAC Coil A Low
C2 (Red)31BLK/WHTFuel Injector No. 5 Control
C2 (Red)32LT BLU/BLKFuel Injector No. 4 Control
C3 (Clear)1DK GRN/WHTA/C Compressor Clutch Relay Control
C3 (Clear)2DK GRN/WHTEVAP Canister Purge Solenoid Control
C3 (Clear)3—Not Used
C3 (Clear)4BLKSensor Ground
C3 (Clear)5BRNGenerator Terminal L Control/Monitoring
C3 (Clear)6RED/BLKPressure Control Solenoid High
C3 (Clear)7 & 8—Not Used
C3 (Clear)9WHTIC Control
C3 (Clear)10—Not Used
C3 (Clear)11REDTransmission Range C Input
C3 (Clear)12GRYSensor Reference Voltage
C3 (Clear)13PPLFuel Level Sensor Signal
C3 (Clear)14 & 15—Not Used
C3 (Clear)16LT BLU/WHTPressure Control Solenoid Low
C3 (Clear)17BLK/WHTVCM Ground
C3 (Clear)18BLK/WHTVCM Ground
C3 (Clear)19BLKSensor Ground
C3 (Clear)20—Not Used
C3 (Clear)21ORGBattery Voltage
C3 (Clear)22DK BLUTransmission Range B Input
C3 (Clear)23PNKTransmission Range A Input
C3 (Clear)24—Not Used
C3 (Clear)25GRN/WHTA/C Request Signal
C3 (Clear)26WHTPRNDL P
C3 (Clear)27GRYReference Voltage
C3 (Clear)28GRYPRNDL C
C3 (Clear)29—Not Used
C3 (Clear)30DK GRNA/C Cycling Switch Signal
C3 (Clear)31BLK/WHTPRNDL A
C3 (Clear)32YELPRNDL B
C4 (Black)1DK GRN/WHTFuel Pump Relay Control
C4 (Black)2—Not Used
C4 (Black)3DK GRN/WHTVSS Output
C4 (Black)4DK GRNVSS Output
C4 (Black)5BRN/WHTMIL Control
C4 (Black)6-9—Not Used
C4 (Black)10PPLBrake Switch Input
C4 (Black)11DK GRNSerial Data (Class II)
C4 (Black)12—Not Used
C4 (Black)13BRNIgnition Voltage
C4 (Black)14YELSerial Data (Class II)
C4 (Black)15—Not Used
C4 (Black)16REDEGR Valve Control
C4 (Black)17PNKIgnition Voltage
C4 (Black)18PNKIgnition Voltage
C4 (Black)19BLK/WHT4WD Front Wheel Lock Input
C4 (Black)20WHTEGR Valve Ground
C4 (Black)21—Not Used
C4 (Black)22GRYCPP Switch Signal
C4 (Black)23GRY/BLK4WD Indicator Signal Input
C4 (Black)24LT BLU/BLKCruise Engaged Input
(1) (Схема №3)
(1)(Схема №3)

POWERTRAIN CONTROL MODULE (PCM) - 4.3L ("S" & "T" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 4.8L, 5.3L & 6.0L

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1BLKPCM Ground
C1 (Blue)2LT GRNCKP Sensor Voltage Supply
C1 (Blue)3PNK/BLKFuel Injector No. 3 Control
C1 (Blue)4LT GRN/BLKFuel Injector No. 2 Control
C1 (Blue)5-10—Not Used
C1 (Blue)11LT BLUKS Signal Rear
C1 (Blue)12DK BLU/WHTCKP Sensor Signal
C1 (Blue)13-16—Not Used
C1 (Blue)17DK BLUTransmission Range Signal B
C1 (Blue)18REDTransmission Range Signal C
C1 (Blue)19PNKPCM Ignition Supply
C1 (Blue)20ORGPCM Battery Supply
C1 (Blue)21YEL/BLKCKP Sensor Ground
C1 (Blue)22—Not Used
C1 (Blue)23PPLSensor Ground
C1 (Blue)24—Not Used
C1 (Blue)25TANHO2S Bank 2 Sensor 2 Signal Low
C1 (Blue)26TANHO2S Bank 2 Sensor 1 Signal Low
C1 (Blue)27—Not Used
C1 (Blue)28TAN/WHTHO2S Bank 1 Sensor 2 Signal Low
C1 (Blue)29TAN/WHTHO2S Bank 1 Sensor 1 Signal Low
C1 (Blue)30LT GRNEngine Coolant Level Switch
C1 (Blue)31—Not Used
C1 (Blue)32BLK/WHTPRND A
C1 (Blue)33PPLTCC Brake Switch
C1 (Blue)34WHTPRND P
C1 (Blue)35GRYClutch Switch Signal
C1 (Blue)36BLKFuel Injector No. 1 Control
C1 (Blue)37YEL/BLKFuel Injector No. 6 Control
C1 (Blue)38 & 39—Not Used
C1 (Blue)40BLK/WHTPCM Ground
C1 (Blue)41BLKSensor Ground
C1 (Blue)42—Not Used
C1 (Blue)43RED/BLKFuel Injector No. 7 Control
C1 (Blue)44LT BLU/BLKFuel Injector No. 4 Control
C1 (Blue)45GRYFuel Tank Pressure Sensor Reference Voltage
C1 (Blue)46GRYTP Sensor Reference Voltage
C1 (Blue)47GRYMAP Sensor Reference Voltage
C1 (Blue)48GRYEGR Pintle Position Sensor Reference Voltage
C1 (Blue)49 & 50—Not Used
C1 (Blue)51DK BLUKS Signal Front
C1 (Blue)52—Not Used
C1 (Blue)53BLKFuel Tank Pressure Sensor Ground
C1 (Blue)54BLKTP Sensor Ground
C1 (Blue)55BRNEGR Pintle Position Sensor Signal
C1 (Blue)56—Not Used
C1 (Blue)57ORGPCM Battery Supply
C1 (Blue)58DK GRNSerial Data
C1 (Blue)59YELSerial Data
C1 (Blue)60ORG/BLKMAP Sensor Ground
C1 (Blue)61PNK/BLKCMP Sensor Ground
C1 (Blue)62—Not Used
C1 (Blue)63GRYECT Sensor Ground
C1 (Blue)64—Not Used
C1 (Blue)65PPLHO2S Bank 2 Sensor 2 Signal High
C1 (Blue)66PPLHO2S Bank 2 Sensor 1 Signal High
C1 (Blue)67—Not Used
C1 (Blue)68PPL/WHTHO2S Bank 1 Sensor 2 Signal High
C1 (Blue)69PPL/WHTHO2S Bank 1 Sensor 1 Signal High
C1 (Blue)70BRNLow Oil Level Switch
C1 (Blue)71—Not Used
C1 (Blue)72YELPRND B
C1 (Blue)73BRN/WHTCMP Sensor Signal
C1 (Blue)74YELECT Sensor Signal
C1 (Blue)75PNKPCM Ignition Supply
C1 (Blue)76BLK/WHTFuel Injector No. 5 Control
C1 (Blue)77DK BLU/WHTFuel Injector No. 8 Control
C1 (Blue)78—Not Used
C1 (Blue)79WHT3-2 Shift Solenoid Control
C1 (Blue)80ORG/BLKFuel Level Sensor Ground
C2 (Red)1BLK/WHTPCM Ground
C2 (Red)2BRNTCC Control Solenoid
C2 (Red)3-5—Not Used
C2 (Red)6RED/BLKTrans Fluid Pressure Control Solenoid High
C2 (Red)7REDEGR Solenoid Supply
C2 (Red)8LT BLU/WHTTrans Fluid Pressure Control Solenoid Low
C2 (Red)9DK GRN/WHTFuel Pump Relay Control
C2 (Red)10WHTEngine Speed (Tach) Output Signal
C2 (Red)11DK BLUSecondary A/C High Pressure Switch
C2 (Red)12—Not Used
C2 (Red)13LT BLU/BLKCruise Control Engage Signal
C2 (Red)14—Not Used
C2 (Red)15BRNGenerator L Terminal
C2 (Red)16GRY/BLK4WD Switch Signal Low
C2 (Red)17DK GRN/WHTA/C Request Signal
C2 (Red)18—Not Used
C2 (Red)19BLK/WHT4WD Front Axle Switch
C2 (Red)20LT GRN/BLKVSS Reference Low
C2 (Red)21PPL/WHTVSS Signal
C2 (Red)22RED/BLKVSS Signal (6.0L)
C2 (Red)23DK BLU/WHTVSS Reference Low (6.0L)
C2 (Red)24DK BLUTP Sensor Signal
C2 (Red)25TANIAT Sensor Signal
C2 (Red)26PPLIgnition Control No. 1
C2 (Red)27REDIgnition Control No. 7
C2 (Red)28LT BLU/WHTIgnition Control No. 6
C2 (Red)29DK GRN/WHTIgnition Control No. 4
C2 (Red)30—Not Used
C2 (Red)31YELMAF Sensor Signal
C2 (Red)32LT GRNMAP Sensor Signal
C2 (Red)33DK GRNHVAC Recirculation Door Control
C2 (Red)34DK GRN/WHTEVAP Canister Purge Solenoid Control
C2 (Red)35—Not Used
C2 (Red)36BRNAIR Pump Relay Control
C2 (Red)37 & 38—Not Used
C2 (Red)39REDCMP Sensor Voltage Supply
C2 (Red)40BLK/WHTPCM Ground
C2 (Red)41WHTEGR Solenoid Ground
C2 (Red)42TAN/BLKTCC Enable Circuit
C2 (Red)43DK GRN/WHTA/C Compressor Clutch Relay Control
C2 (Red)44—Not Used
C2 (Red)45WHTEVAP Canister Vent Valve Control
C2 (Red)46BRN/WHTMIL Control
C2 (Red)47YEL/BLKTransmission Shift Solenoid B
C2 (Red)48LT GRNTransmission Shift Solenoid A
C2 (Red)49YEL/BLKVehicle Speed Output Circuit 128K
C2 (Red)50DK GRN/WHTVehicle Speed Output Circuit 4K
C2 (Red)51YEL/BLKTransmission Temperature Sensor Signal
C2 (Red)52 & 53—Not Used
C2 (Red)54PPLFuel Level Sensor Signal
C2 (Red)55DK GRNA/C Compressor Cycling Switch Signal
C2 (Red)56—Not Used
C2 (Red)57BLKIAT Sensor Ground
C2 (Red)58 & 59—Not Used
C2 (Red)60BRNIC Reference Low Bank 1
C2 (Red)61BRN/WHTIC Reference Low Bank 2
C2 (Red)62GRYPRND C
C2 (Red)63PNKTransmission Range Signal A
C2 (Red)64DK GRNFuel Tank Pressure Sensor Signal
C2 (Red)65—Not Used
C2 (Red)66PPL/WHTIgnition Control No. 8
C2 (Red)67RED/WHTIgnition Control No. 2
C2 (Red)68DK GRNIgnition Control No. 5
C2 (Red)69LT BLUIgnition Control No. 3
C2 (Red)70-75—Not Used
C2 (Red)76LT GRN/WHTIAC Coil B High
C2 (Red)77LT GRN/BLKIAC Coil B Low
C2 (Red)78LT BLU/BLKIAC Coil A Low
C2 (Red)79LT BLU/WHTIAC Coil A High
C2 (Red)80—Not Used
(1) (Схема №2)
(1)(Схема №2)

POWERTRAIN CONTROL MODULE (PCM) - 4.8L, 5.3L & 6.0L (1)

POWERTRAIN CONTROL MODULE (PCM) - 5.0L & 5.7L ("C" & "K" SERIES)

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1 & 2—Not Used
C1 (Blue)3BRN/WHTCMP Sensor 1x Signal
C1 (Blue)4-6—Not Used
C1 (Blue)7TANHO2S Bank 2 Sensor 1 Low
C1 (Blue)8PNK/BLKCMP Sensor Ground
C1 (Blue)9PPLFuel Level Output
C1 (Blue)10TAN/BLKTCC Solenoid Control
C1 (Blue)11 & 12—Not Used
C1 (Blue)13WHT3-2 Shift Solenoid Control
C1 (Blue)14BRNAIR Pump Relay Control
C1 (Blue)15YEL/BLKVSS Output
C1 (Blue)16-18—Not Used
C1 (Blue)19PPL/WHTHO2S Bank 1 Sensor 1 High
C1 (Blue)20PPLHO2S Bank 2 Sensor 2 High (Under 8600 GVW); HO2S Bank 1 Sensor 2 High (Over 8600 GVW)
C1 (Blue)21PPLHO2S Bank 2 Sensor 1 High
C1 (Blue)22PPL/WHTHO2S Bank 2 Sensor 2 High (Over 8600 GVW); HO2S Bank 1 Sensor 2 High (Under 8600 GVW)
C1 (Blue)23—Not Used
C1 (Blue)24TANHO2S Bank 2 Sensor 2 Low (Under 8600 GVW); HO2S Bank 1 Sensor 2 Low (Over 8600 GVW)
C1 (Blue)25TAN/WHTHO2S Bank 1 Sensor 1 Low
C1 (Blue)26TAN/WHTHO2S Bank 2 Sensor 2 Low (Over 8600 GVW); HO2S Bank 1 Sensor 2 Low (Under 8600 GVW)
C1 (Blue)27—Not Used
C1 (Blue)28PPLCKP Sensor Ground
C1 (Blue)29LT GRN/BLKVSS Low
C1 (Blue)30PPL/WHTVSS High
C1 (Blue)31YELCKP Sensor 4x Signal
C1 (Blue)32—Not Used
C2 (Red)1—Not Used
C2 (Red)2WHTEVAP Canister Vent Solenoid Control
C2 (Red)3—Not Used
C2 (Red)4YEL/BLK2-3 Shift Solenoid Control
C2 (Red)5—Not Used
C2 (Red)6LT GRN1-2 Shift Solenoid Control
C2 (Red)7BRNTCC PWM Solenoid Control
C2 (Red)8BLKFuel Injector No. 1 Control
C2 (Red)9DK BLU/WHTFuel Injector No. 8 Control
C2 (Red)10BRNEGR Pintle Position Signal
C2 (Red)11LT GRN/BLKFuel Injector No. 2 Control
C2 (Red)12RED/BLKFuel Injector No. 7 Control
C2 (Red)13LT GRN/WHTIAC Coil B High
C2 (Red)14LT BLU/WHTIAC Coil A High
C2 (Red)15BLK/WHTFuel Injector No. 5 Control
C2 (Red)16YEL/BLKFuel Injector No. 6 Control
C2 (Red)17 & 18—Not Used
C2 (Red)19DK BLUKS Input
C2 (Red)20—Not Used
C2 (Red)21LT GRNMAP Sensor Signal
C2 (Red)22TANIAT Sensor Signal
C2 (Red)23YELECT Sensor Signal
C2 (Red)24DK BLUTP Sensor Signal
C2 (Red)25DK GRNFuel Tank Pressure Sensor Signal
C2 (Red)26—Not Used
C2 (Red)27YEL/BLKTFT Sensor Signal
C2 (Red)28YELMAF Sensor Signal
C2 (Red)29LT GRN/BLKIAC Coil B Low
C2 (Red)30LT BLU/BLKIAC Coil A Low
C2 (Red)31LT BLU/BLKFuel Injector No. 4 Control
C2 (Red)32PNK/BLKFuel Injector No. 3 Control
C3 (Clear)1DK GRN/WHTA/C Compressor Clutch Relay Control
C3 (Clear)2DK GRN/WHTEVAP Canister Purge Solenoid Control
C3 (Clear)3—Not Used
C3 (Clear)4BLKSensor Ground
C3 (Clear)5—Not Used
C3 (Clear)6RED/BLKPressure Control Solenoid High
C3 (Clear)7DK BLU/WHTTransmission Input Shaft Speed Sensor Low
C3 (Clear)8RED/BLKTransmission Input Shaft Speed Sensor High
C3 (Clear)9WHTIC Control
C3 (Clear)10—Not Used
C3 (Clear)11REDTransmission Range C Input
C3 (Clear)12GRYSensor Reference Voltage
C3 (Clear)13PPL/WHTFuel Level Sensor Signal
C3 (Clear)14DK BLUA/C Recirculation Signal
C3 (Clear)15—Not Used
C3 (Clear)16LT BLU/WHTPressure Control Solenoid Low
C3 (Clear)17BLK/WHTPCM Ground
C3 (Clear)18BLK/WHTPCM Ground
C3 (Clear)19BLKSensor Ground
C3 (Clear)20—Not Used
C3 (Clear)21ORGBattery Voltage
C3 (Clear)22DK BLUTransmission Range B Input
C3 (Clear)23PNKTransmission Range A Input
C3 (Clear)24—Not Used
C3 (Clear)25DK GRN/WHTA/C Request Signal
C3 (Clear)26—Not Used
C3 (Clear)27GRYSensor Reference Voltage
C3 (Clear)28 & 29—Not Used
C3 (Clear)30DK GRNA/C Cycling Switch Signal
C3 (Clear)31 & 32—Not Used
C4 (Black)1DK GRN/WHTFuel Pump Relay Control
C4 (Black)2—Not Used
C4 (Black)3DK GRN/WHTVSS Output
C4 (Black)4DK GRNVSS Output
C4 (Black)5BRN/WHTMIL Control
C4 (Black)6—Not Used
C4 (Black)7DK GRNRecirculation Door Motor Control
C4 (Black)8—Not Used
C4 (Black)9DK BLUAuxiliary Fan
C4 (Black)10PPLBrake Switch Input
C4 (Black)11PPLSerial Data (Class II)
C4 (Black)12BLKDual Fuel Module Return
C4 (Black)13BRNIgnition Voltage
C4 (Black)14—Not Used
C4 (Black)15TAN/BLKShift Light (M/T)
C4 (Black)16REDEGR Valve Control
C4 (Black)17—Not Used
C4 (Black)18PNKIgnition Voltage
C4 (Black)19BLK/WHT4WD Wheel Lock Input
C4 (Black)20WHTEGR Valve Ground
C4 (Black)21—Not Used
C4 (Black)22BRN/WHTClutch Pedal Position Switch Signal (M/T)
C4 (Black)23GRY/BLK4WD Indicator Signal Input
C4 (Black)24LT BLU/BLKCruise Engaged Input
(1) (Схема №3)
(1)(Схема №3)

POWERTRAIN CONTROL MODULE (PCM) - 5.0L & 5.7L ("C" & "K" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 5.0L & 5.7L ("G" SERIES)

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1 & 2—Not Used
C1 (Blue)3BRN/WHTCMP Sensor 1x Signal
C1 (Blue)4-6—Not Used
C1 (Blue)7TANHO2S Bank 2 Sensor 1 Low
C1 (Blue)8PNK/BLKCMP Sensor Ground
C1 (Blue)9PPLFuel Level Output
C1 (Blue)10TAN/BLKTCC Solenoid Control
C1 (Blue)11 & 12—Not Used
C1 (Blue)13WHT3-2 Shift Solenoid Control
C1 (Blue)14—Not Used
C1 (Blue)15YEL/BLKVSS Output
C1 (Blue)16-18—Not Used
C1 (Blue)19PPL/WHTHO2S Bank 1 Sensor 1 High
C1 (Blue)20PPLHO2S Bank 1 Sensor 3 High (5.0L); HO2S Bank 1 Sensor 2 High (5.7L)
C1 (Blue)21PPLHO2S Bank 2 Sensor 1 High
C1 (Blue)22PPL/WHTHO2S Bank 2 Sensor 2 High (5.7L)
C1 (Blue)23—Not Used
C1 (Blue)24TANHO2S Bank 1 Sensor 3 Low (5.0L); HO2S Bank 1 Sensor 2 Low (5.7L)
C1 (Blue)25TAN/WHTHO2S Bank 1 Sensor 1 Low
C1 (Blue)26TAN/WHTHO2S Bank 2 Sensor 2 Low (5.7L)
C1 (Blue)27—Not Used
C1 (Blue)28PPLCKP Sensor Ground
C1 (Blue)29LT GRN/BLKVSS Low
C1 (Blue)30PPL/WHTVSS High
C1 (Blue)31YELCKP Sensor 4x Signal
C1 (Blue)32—Not Used
C2 (Red)1—Not Used
C2 (Red)2WHTEVAP Canister Vent Solenoid Control
C2 (Red)3—Not Used
C2 (Red)4YEL/BLK2-3 Shift Solenoid Control
C2 (Red)5—Not Used
C2 (Red)6LT GRN1-2 Shift Solenoid Control
C2 (Red)7BRNTCC PWM Solenoid Control
C2 (Red)8BLKFuel Injector No. 1 Control
C2 (Red)9DK BLU/WHTFuel Injector No. 8 Control
C2 (Red)10BRNEGR Pintle Position Signal
C2 (Red)11LT GRN/BLKFuel Injector No. 2 Control
C2 (Red)12RED/BLKFuel Injector No. 7 Control
C2 (Red)13LT GRN/WHTIAC Coil B High
C2 (Red)14LT BLU/WHTIAC Coil A High
C2 (Red)15BLK/WHTFuel Injector No. 5 Control
C2 (Red)16YEL/BLKFuel Injector No. 6 Control
C2 (Red)17 & 18—Not Used
C2 (Red)19DK BLUKS Input
C2 (Red)20—Not Used
C2 (Red)21LT GRNMAP Sensor Signal
C2 (Red)22TANIAT Sensor Signal
C2 (Red)23YELECT Sensor Signal
C2 (Red)24DK BLUTP Sensor Signal
C2 (Red)25DK GRNFuel Tank Pressure Sensor Signal
C2 (Red)26—Not Used
C2 (Red)27YEL/BLKTFT Sensor Signal
C2 (Red)28YELMAF Sensor Signal
C2 (Red)29LT GRN/BLKIAC Coil B Low
C2 (Red)30LT BLU/BLKIAC Coil A Low
C2 (Red)31LT BLU/BLKFuel Injector No. 4 Control
C2 (Red)32PNK/BLKFuel Injector No. 3 Control
C3 (Clear)1DK GRN/WHTA/C Compressor Clutch Relay Control
C3 (Clear)2DK GRN/WHTEVAP Canister Purge Solenoid Control
C3 (Clear)3—Not Used
C3 (Clear)4BLKSensor Ground
C3 (Clear)5—Not Used
C3 (Clear)6RED/BLKPressure Control Solenoid High
C3 (Clear)7DK BLU/WHTTransmission Input Shaft Speed Sensor Low
C3 (Clear)8RED/BLKTransmission Input Shaft Speed Sensor High
C3 (Clear)9WHTIC Control
C3 (Clear)10—Not Used
C3 (Clear)11REDTransmission Range C Input
C3 (Clear)12GRYSensor Reference Voltage
C3 (Clear)13PPL/WHTFuel Level Sensor Signal
C3 (Clear)14 & 15—Not Used
C3 (Clear)16LT BLU/WHTPressure Control Solenoid Low
C3 (Clear)17BLK/WHTPCM Ground
C3 (Clear)18BLK/WHTPCM Ground
C3 (Clear)19BLKSensor Ground
C3 (Clear)20—Not Used
C3 (Clear)21ORGBattery Voltage
C3 (Clear)22DK BLUTransmission Range B Input
C3 (Clear)23PNKTransmission Range A Input
C3 (Clear)24—Not Used
C3 (Clear)25DK GRN/WHTA/C Request Signal
C3 (Clear)26—Not Used
C3 (Clear)27GRYSensor Reference Voltage
C3 (Clear)28 & 29—Not Used
C3 (Clear)30DK GRNA/C Cycling Switch Signal
C3 (Clear)31 & 32—Not Used
C4 (Black)1DK GRN/WHTFuel Pump Relay Control
C4 (Black)2—Not Used
C4 (Black)3DK GRN/WHTVSS Output
C4 (Black)4DK GRNVSS Output
C4 (Black)5BRN/WHTMIL Control
C4 (Black)6-9—Not Used
C4 (Black)10PPLBrake Switch Input
C4 (Black)11PPLSerial Data (Class II)
C4 (Black)12—Not Used
C4 (Black)13BRNIgnition Voltage
C4 (Black)14 & 15—Not Used
C4 (Black)16REDEGR Valve Control
C4 (Black)17—Not Used
C4 (Black)18PNKIgnition Voltage
C4 (Black)19—Not Used
C4 (Black)20WHTEGR Valve Ground
C4 (Black)21-23—Not Used
C4 (Black)24LT BLU/BLKCruise Engaged Input
(1) (Схема №3)
(1)(Схема №3)

POWERTRAIN CONTROL MODULE (PCM) - 5.0L & 5.7L ("G" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 5.7L ("P" SERIES)

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1 & 2—Not Used
C1 (Blue)3BRN/WHTCMP Sensor 1x Signal
C1 (Blue)4PNKIgnition Voltage
C1 (Blue)5 & 6—Not Used
C1 (Blue)7TANHO2S Bank 2 Sensor 1 Low
C1 (Blue)8PNK/BLKCMP Sensor Ground
C1 (Blue)9PPLFuel Level Signal Output
C1 (Blue)10-13—Not Used
C1 (Blue)14BRNAIR Relay Control (Calif. Only)
C1 (Blue)15YEL/BLKVSS Output
C1 (Blue)16-18—Not Used
C1 (Blue)19PPL/WHTHO2S Bank 1 Sensor 1 High
C1 (Blue)20PPLHO2S Bank 1 Sensor 2 High
C1 (Blue)21PPLHO2S Bank 2 Sensor 1 High
C1 (Blue)22PPL/WHTHO2S Bank 2 Sensor 2 High
C1 (Blue)23—Not Used
C1 (Blue)24TANHO2S Bank 1 Sensor 2 Low
C1 (Blue)25TAN/WHTHO2S Bank 1 Sensor 1 Low
C1 (Blue)26TAN/WHTHO2S Bank 2 Sensor 2 Low
C1 (Blue)27—Not Used
C1 (Blue)28PPLCKP Sensor Ground
C1 (Blue)29LT GRN/BLKVSS Low
C1 (Blue)30PPL/WHTVSS High
C1 (Blue)31YELCKP Sensor 4x Signal
C1 (Blue)32—Not Used
C2 (Red)1—Not Used
C2 (Red)2WHTEVAP Canister Vent Solenoid Control
C2 (Red)3—Not Used
C2 (Red)4YEL/BLK2-3 Shift Solenoid Control
C2 (Red)5—Not Used
C2 (Red)6LT GRN1-2 Shift Solenoid Control
C2 (Red)7BRNTCC PWM Solenoid Control
C2 (Red)8BLKFuel Injector No. 1 Control
C2 (Red)9DK BLU/WHTFuel Injector No. 6 Control
C2 (Red)10BRNEGR Pintle Position Signal
C2 (Red)11LT GRN/BLKFuel Injector No. 2 Control
C2 (Red)12RED/BLKFuel Injector No. 7 Control
C2 (Red)13LT GRN/WHTIAC Coil B High
C2 (Red)14LT BLU/WHTIAC Coil A High
C2 (Red)15BLK/WHTFuel Injector No. 5 Control
C2 (Red)16YEL/BLKFuel Injector No. 6 Control
C2 (Red)17 & 18—Not Used
C2 (Red)19DK BLUKS Signal
C2 (Red)20—Not Used
C2 (Red)21LT GRNMAP Sensor Signal
C2 (Red)22TANIAT Sensor Signal
C2 (Red)23YELECT Sensor Signal
C2 (Red)24DK BLUTP Sensor Signal
C2 (Red)25DK GRNFuel Tank Vacuum Sensor Signal
C2 (Red)26—Not Used
C2 (Red)27YEL/BLKTFT Sensor Signal
C2 (Red)28YELMAF Sensor Signal
C2 (Red)29LT GRN/BLKIAC Coil B Low
C2 (Red)30LT BLU/BLKIAC Coil A Low
C2 (Red)31LT BLU/BLKFuel Injector No. 4 Control
C2 (Red)32PNK/BLKFuel Injector No. 3 Control
C3 (Clear)1DK GRN/WHTA/C Compressor Clutch Relay Control
C3 (Clear)2DK GRN/WHTEVAP Canister Purge Solenoid Control
C3 (Clear)3—Not Used
C3 (Clear)4BLKECT/TP Sensor Ground
C3 (Clear)5—Not Used
C3 (Clear)6RED/BLKPressure Control Solenoid High
C3 (Clear)7DK BLU/WHTInput Shaft Speed Sensor Low
C3 (Clear)8RED/WHTInput Shaft Speed Sensor High
C3 (Clear)9WHTIC Control
C3 (Clear)10—Not Used
C3 (Clear)11REDTransmission Range C Input
C3 (Clear)12GRYTP Sensor Reference Voltage
C3 (Clear)13PPLFuel Level Module (Single Tank)
C3 (Clear)14 & 15—Not Used
C3 (Clear)16LT BLU/WHTPressure Control Solenoid Low
C3 (Clear)17BLK/WHTVCM Ground
C3 (Clear)18BLK/WHTVCM Ground
C3 (Clear)19BLKSensor Ground (EGR/IAT/MAP)
C3 (Clear)20—Not Used
C3 (Clear)21ORGBattery Voltage
C3 (Clear)22DK BLUTransmission Range B Input
C3 (Clear)23PNKTransmission Range A Input
C3 (Clear)24—Not Used
C3 (Clear)25DK GRN/WHTA/C Request Signal
C3 (Clear)26—Not Used
C3 (Clear)27GRYReference Voltage (EGR/MAP)
C3 (Clear)28 & 29—Not Used
C3 (Clear)30DK GRNA/C Compressor Cycling Switch Signal
C3 (Clear)31 & 32—Not Used
C4 (Black)1DK GRN/WHTFuel Pump Relay Control
C4 (Black)2 & 3—Not Used
C4 (Black)4DK GRNVSS Output Signal (Speedometer)
C4 (Black)5BRN/WHTMIL Control
C4 (Black)6-9—Not Used
C4 (Black)10PPLBrake Signal
C4 (Black)11PPLSerial Data (Class II)
C4 (Black)12—Not Used
C4 (Black)13BRNIgnition Voltage
C4 (Black)14 & 15—Not Used
C4 (Black)16REDEGR Valve Feed
C4 (Black)17—Not Used
C4 (Black)18PNKIgnition Voltage
C4 (Black)19—Not Used
C4 (Black)20WHTEGR Valve Control
C4 (Black)21-24—Not Used
(1) (Схема №3)
(1)(Схема №3)

POWERTRAIN CONTROL MODULE (PCM) - 5.7L ("P" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 6.5L ("C" & "K" SERIES)

ConnectorTerminalWire ColorFunction
C1 (Brown)C1—Not Used
C1 (Brown)C2DK GRN/WHTA/C Request Signal
C1 (Brown)C3YELMass Airflow Signal
C1 (Brown)C4TANIntake Air Temperature Signal
C1 (Brown)C5LT BLUAccelerator Pedal Position 2 Signal
C1 (Brown)C6YELGlow Plug Relay Control
C1 (Brown)C7RED/BLKPressure Control Solenoid Valve High
C1 (Brown)C8YELFuel Temperature Signal
C1 (Brown)C9YEL/BLKTransmission Fluid Temperature Sensor
C1 (Brown)C10—Not Used
C1 (Brown)C11YELEngine Coolant Temperature Signal
C1 (Brown)C12GRY/BLKEGR Control Pressure/BARO Signal
C1 (Brown)C13REDClosure Signal
C1 (Brown)C14LT GRNBoost Sensor Signal
C1 (Brown)C15LT BLU/WHTPressure Control Solenoid Valve Low
C1 (Brown)C16—Not Used
C1 (Brown)D1BLU/WHTTransmission Input Speed Signal Low
C1 (Brown)D2GRY/BLK4WD Front Wheel Lock Signal
C1 (Brown)D3YEL/BLKAccelerator Pedal Position 3 Reference Voltage
C1 (Brown)D4DK GRNAccelerator Pedal Position 3 Signal
C1 (Brown)D5GRYFuel Lift Pump Signal
C1 (Brown)D6GRYAccelerator Pedal Position 3 Ground
C1 (Brown)D7BRNGlow Plug Signal
C1 (Brown)D8DK GRN/WHTFuel Lift Pump Control
C1 (Brown)D9PNK/BLKSensor Ground (Pump CAM, High Res. & Fuel Temp.)
C1 (Brown)D10GRY/BLKCruise Resume/Accel Signal
C1 (Brown)D11RED/BLKTransmission Input Speed Signal High
C1 (Brown)D12WHT/BLKAccelerator Pedal Position 1 Reference Voltage
C1 (Brown)D13GRYSensor Reference Voltage (Boost, CKP & EGR)
C1 (Brown)D14GRYSensor Reference Voltage (Pump CAM & High Res.)
C1 (Brown)D15 & D16—Not Used
C2 (Brown)A1BLKClosure Ground
C2 (Brown)A2ORGHigh Res. Signal
C2 (Brown)A3BRNTransmission Input Speed Signal
C2 (Brown)A4BRN/WHTPump CAM Sensor Signal
C2 (Brown)A5YELCKP Sensor Signal
C2 (Brown)A6DK GRNVehicle Speed Sensor Signal
C2 (Brown)A7RED/BLKInjection Timing Stepper Motor High Coil 1
C2 (Brown)A8TAN/BLKInjection Timing Stepper Motor Low Coil 1
C2 (Brown)A9ORG/BLKInjection Timing Stepper Motor Low Coil 2
C2 (Brown)A10YEL/BLKInjection Timing Stepper Motor High Coil 2
C2 (Brown)A11GRYCruise Control On/Off Signal
C2 (Brown)A12PPLAccelerator Pedal Position 2 Ground
C2 (Brown)B1BRNAccelerator Pedal Position 1 Ground
C2 (Brown)B2DK BLUAccelerator Pedal Position 1 Signal
C2 (Brown)B3BLK/WHT4WD Low Indicator Signal
C2 (Brown)B4REDTransmission Range Switch C Input
C2 (Brown)B5DK BLUTransmission Range Switch B Input
C2 (Brown)B6PNKTransmission Range Switch A Input
C2 (Brown)B7 & B8—Not Used
C2 (Brown)B9PPL (A/T)Cruise Control Brake Switch Signal (A/T)
C2 (Brown)B9BRN/WHT (M/T)Brake/Clutch Pedal Position Switch Signal (M/T)
C2 (Brown)B10WHTBrake Switch Signal
C2 (Brown)B11DK BLUCruise Set/Coast Signal
C2 (Brown)B12BLKSensor Ground (Boost, EGR, ECT, IAT, Fuel Temp., TFT & CKP)
C3 (Blue)C1—Not Used
C3 (Blue)C2TANAccelerator Pedal Position 2 Reference Voltage
C3 (Blue)C3LT GRNFuel Injection Control
C3 (Blue)C4LT GRN1-2 Shift Solenoid Signal
C3 (Blue)C5BRNTCC PWM Solenoid Signal
C3 (Blue)C6YEL/BLK2-3 Shift Solenoid Signal
C3 (Blue)C7DK BLUWait To Start Light Control
C3 (Blue)C8PPLClass II Communication
C3 (Blue)C9 & C10—Not Used
C3 (Blue)C11PNKIgnition Voltage
C3 (Blue)C12PNKIgnition Voltage
C3 (Blue)C13ORGBattery Voltage
C3 (Blue)C14BRN/WHTMIL Control
C3 (Blue)C15DK BLU/WHTEngine Shutoff Control
C3 (Blue)C16GRYEGR Solenoid Control
C3 (Blue)D1 & D2—Not Used
C3 (Blue)D3LT GRN/BLKFuel Injection Control
C3 (Blue)D4—Not Used
C3 (Blue)D5DK GRN/WHTA/C Enable Signal
C3 (Blue)D6BLK/WHTPCM Ground
C3 (Blue)D7TAN/WHTPCM Ground
C3 (Blue)D8-D10—Not Used
C3 (Blue)D11WHT/BLKService Throttle Soon Light Control
C3 (Blue)D12WHTEGR Vent Control
C3 (Blue)D13ORGBattery Voltage
C3 (Blue)D14YELWastegate Solenoid Control
C3 (Blue)D15DK BLU/WHTEngine Shutoff Solenoid Control
C3 (Blue)D16—Not Used
(1) (Схема №4)
(1)(Схема №4)

POWERTRAIN CONTROL MODULE (PCM) - 6.5L ("C" & "K" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 6.5L ("G" SERIES)

ConnectorTerminalWire ColorFunction
C1 (Brown)C1—Not Used
C1 (Brown)C2DK GRN/WHTA/C Request Signal
C1 (Brown)C3YELMass Airflow Signal
C1 (Brown)C4TANIntake Air Temperature Signal
C1 (Brown)C5LT BLUAccelerator Pedal Position 2 Signal
C1 (Brown)C6YELGlow Plug Relay Control
C1 (Brown)C7RED/BLKPressure Control Solenoid Valve High
C1 (Brown)C8YELFuel Temperature Signal
C1 (Brown)C9YEL/BLKTransmission Fluid Temperature Sensor
C1 (Brown)C10—Not Used
C1 (Brown)C11YELEngine Coolant Temperature Signal
C1 (Brown)C12GRY/BLKEGR Control Pressure/BARO Signal
C1 (Brown)C13REDClosure Signal
C1 (Brown)C14LT GRNBoost Sensor Signal
C1 (Brown)C15LT BLU/WHTPressure Control Solenoid Valve Low
C1 (Brown)C16—Not Used
C1 (Brown)D1BLU/WHTTransmission Input Speed Signal Low
C1 (Brown)D2GRY/BLK4WD Low Indicator Signal
C1 (Brown)D3YEL/BLKAccelerator Pedal Position 3 Reference Voltage
C1 (Brown)D4DK GRNAccelerator Pedal Position 3 Signal
C1 (Brown)D5GRYFuel Lift Pump Signal
C1 (Brown)D6GRYAccelerator Pedal Position 3 Ground
C1 (Brown)D7LT BLUGlow Plug Signal
C1 (Brown)D8DK GRN/WHTFuel Lift Pump Control
C1 (Brown)D9PNK/BLKSensor Ground (Pump CAM, High Res. & Fuel Temp.)
C1 (Brown)D10GRY/BLKCruise Resume/Accel Signal
C1 (Brown)D11RED/BLKTransmission Input Speed Signal High
C1 (Brown)D12WHT/BLKAccelerator Pedal Position 1 Reference Voltage
C1 (Brown)D13GRYSensor Reference Voltage (Boost & CKP)
C1 (Brown)D14GRYSensor Reference Voltage (Pump CAM & High Res.)
C1 (Brown)D15 & D16—Not Used
C2 (Brown)A1BLKClosure Ground
C2 (Brown)A2ORGHigh Res. Signal
C2 (Brown)A3BRNTransmission Output Speed Signal
C2 (Brown)A4BRN/WHTPump CAM Sensor Signal
C2 (Brown)A5YELCKP Sensor Signal
C2 (Brown)A6DK GRNVehicle Speed Sensor Signal
C2 (Brown)A7RED/BLKInjection Timing Stepper Motor High
C2 (Brown)A8TAN/BLKInjection Timing Stepper Motor Low
C2 (Brown)A9ORG/BLKInjection Timing Stepper Motor Low
C2 (Brown)A10YEL/BLKInjection Timing Stepper Motor High
C2 (Brown)A11GRYCruise Control On/Off Signal
C2 (Brown)A12PPLAccelerator Pedal Position 2 Ground
C2 (Brown)B1BRNAccelerator Pedal Position 1 Ground
C2 (Brown)B2DK BLUAccelerator Pedal Position 1 Signal
C2 (Brown)B3BLK/WHTFront Axle Switch Signal
C2 (Brown)B4REDTransmission Range Switch C Input
C2 (Brown)B5DK BLUTransmission Range Switch B Input
C2 (Brown)B6PNKTransmission Range Switch A Input
C2 (Brown)B7 & B8—Not Used
C2 (Brown)B9PPLBrake Switch Signal
C2 (Brown)B10WHTBrake Switch Signal
C2 (Brown)B11DK BLUCruise Set/Coast Signal
C2 (Brown)B12BLKSensor Ground (Boost, ECT, IAT & TFT)
C3 (Blue)C1—Not Used
C3 (Blue)C2TANAccelerator Pedal Position 2 Signal
C3 (Blue)C3LT GRNFuel Injection Control
C3 (Blue)C4LT GRN1-2 Shift Solenoid Signal
C3 (Blue)C5BRNTCC PWM Solenoid Signal
C3 (Blue)C6YEL/BLK1-2 Shift Solenoid Signal
C3 (Blue)C7DK BLUWait To Start Light Control
C3 (Blue)C8PPLClass 2 Communication
C3 (Blue)C9 & C10—Not Used
C3 (Blue)C11PNKIgnition Voltage
C3 (Blue)C12PNKIgnition Voltage
C3 (Blue)C13ORGBattery Voltage
C3 (Blue)C14BRN/WHTMIL Control
C3 (Blue)C15DK BLU/WHTEngine Shutoff Control
C3 (Blue)C16—Not Used
C3 (Blue)D1 & D2—Not Used
C3 (Blue)D3LT GRNFuel Injection Control
C3 (Blue)D4—Not Used
C3 (Blue)D5DK GRN/WHTA/C Enable Signal
C3 (Blue)D6BLK/WHTPCM Ground
C3 (Blue)D7TAN/WHTPCM Ground
C3 (Blue)D8-D10—Not Used
C3 (Blue)D11WHT/BLKService Throttle Soon Light Control
C3 (Blue)D12—Not Used
C3 (Blue)D13ORGBattery Voltage
C3 (Blue)D14YELWastegate Solenoid Control
C3 (Blue)D15DK BLU/WHTEngine Shutoff Solenoid Control
C3 (Blue)D16—Not Used
(1) (Схема №4)
(1)(Схема №4)

POWERTRAIN CONTROL MODULE (PCM) - 6.5L ("G" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 6.5L ("P" SERIES)

ConnectorTerminalWire ColorFunction
C1 (Brown)C1PPLCrankshaft Position Sensor Ground
C1 (Brown)C2DK GRN/WHTA/C Request Signal
C1 (Brown)C3—Not Used
C1 (Brown)C4TANIntake Air Temperature Signal
C1 (Brown)C5LT BLUAccelerator Pedal Position 2 Signal
C1 (Brown)C6YELGlow Plug Relay Control
C1 (Brown)C7RED/BLKPressure Control Solenoid Valve High
C1 (Brown)C8YELFuel Temperature Signal
C1 (Brown)C9YEL/BLKTransmission Fluid Temperature Sensor Signal
C1 (Brown)C10—Not Used
C1 (Brown)C11YELEngine Coolant Temperature Signal
C1 (Brown)C12—Not Used
C1 (Brown)C13REDClosure Signal
C1 (Brown)C14LT GRNBoost Sensor Signal
C1 (Brown)C15LT BLU/WHTPressure Control Solenoid Valve Low
C1 (Brown)C16—Not Used
C1 (Brown)D1BLU/WHTTransmission Input Speed Signal Low
C1 (Brown)D2—Not Used
C1 (Brown)D3YEL/BLKAccelerator Pedal Position 3 Reference Voltage
C1 (Brown)D4DK GRNAccelerator Pedal Position 3 Signal
C1 (Brown)D5GRYFuel Lift Pump Signal
C1 (Brown)D6GRYAccelerator Pedal Position 3 Ground
C1 (Brown)D7BRNGlow Plug Signal
C1 (Brown)D8DK GRN/WHTFuel Pump Relay Control
C1 (Brown)D9PNK/BLKSensor Ground (Pump CAM, High Res. & Fuel Temp.)
C1 (Brown)D10GRY/BLKCruise Control Resume/Accel Signal
C1 (Brown)D11RED/BLKTransmission Input Speed Signal High
C1 (Brown)D12WHT/BLKAccelerator Pedal Position 1 Reference Voltage
C1 (Brown)D13GRYSensor Reference Voltage (Boost & CKP)
C1 (Brown)D14GRYSensor Reference Voltage (Pump CAM & High Res.)
C1 (Brown)D15 & D16—Not Used
C2 (Brown)A1BLKClosure Ground
C2 (Brown)A2ORGHigh Res. Signal
C2 (Brown)A3BRNTransmission Output Speed Signal
C2 (Brown)A4BRN/WHTPump CAM Sensor Signal
C2 (Brown)A5YELCKP Sensor Signal
C2 (Brown)A6DK GRN/WHTVehicle Speed Sensor Signal
C2 (Brown)A7RED/BLKInjection Timing Stepper Motor High Coil 1
C2 (Brown)A8TAN/BLKInjection Timing Stepper Motor Low Coil 1
C2 (Brown)A9ORG/BLKInjection Timing Stepper Motor Low Coil 2
C2 (Brown)A10YEL/BLKInjection Timing Stepper Motor High Coil 2
C2 (Brown)A11GRYCruise Control On/Off Signal
C2 (Brown)A12PPLAccelerator Pedal Position 2 Ground
C2 (Brown)B1BRNAccelerator Pedal Position 1 Ground
C2 (Brown)B2DK BLUAccelerator Pedal Position 1 Signal
C2 (Brown)B3—Not Used
C2 (Brown)B4REDTransmission Range Switch C Input
C2 (Brown)B5DK BLUTransmission Range Switch B Input
C2 (Brown)B6PNKTransmission Range Switch A Input
C2 (Brown)B7 & B8—Not Used
C2 (Brown)B9PPLTCC/ABS Brake Switch Signal
C2 (Brown)B10LT BLUBrakelight Switch Signal
C2 (Brown)B11DK BLUCruise Set/Coast Signal
C2 (Brown)B12BLKSensor Ground (Boost, ECT, IAT & TFT)
C3 (Blue)C1—Not Used
C3 (Blue)C2TANAccelerator Pedal Position 2 Reference Voltage
C3 (Blue)C3LT GRNFuel Injection Control
C3 (Blue)C4LT GRN1-2 Shift Solenoid Signal
C3 (Blue)C5BRNTCC PWM Solenoid
C3 (Blue)C6YEL/BLK2-3 Shift Solenoid Signal
C3 (Blue)C7DK BLUWait To Start Light Control
C3 (Blue)C8PPLClass II Communication
C3 (Blue)C9 & C10—Not Used
C3 (Blue)C11PNKIgnition Voltage
C3 (Blue)C12PNKIgnition Voltage
C3 (Blue)C13ORGBattery Voltage
C3 (Blue)C14BRN/WHTMIL Control
C3 (Blue)C15DK BLU/WHTEngine Shutoff Control
C3 (Blue)C16—Not Used
C3 (Blue)D1-D4—Not Used
C3 (Blue)D5DK GRN/WHTA/C Enable Signal
C3 (Blue)D6BLK/WHTPCM Ground
C3 (Blue)D7BLK/WHTPCM Ground
C3 (Blue)D8-D10—Not Used
C3 (Blue)D11WHT/BLKService Throttle Soon Light Control
C3 (Blue)D12—Not Used
C3 (Blue)D13ORGBattery Voltage
C3 (Blue)D14YELWastegate Solenoid Control
C3 (Blue)D15 & D16—Not Used
(1) (Схема №4)
(1)(Схема №4)

POWERTRAIN CONTROL MODULE (PCM) - 6.5L ("P" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 7.4L ("C" & "K" SERIES)

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1 & 2—Not Used
C1 (Blue)3BRN/WHTCMP Sensor 1x Signal
C1 (Blue)4-6—Not Used
C1 (Blue)7TANHO2S Bank 2 Sensor 1 Low
C1 (Blue)8PNK/BLKCMP Low
C1 (Blue)9PPLFuel Gauge
C1 (Blue)10-13—Not Used
C1 (Blue)14BRNAIR Relay Control (Calif. Only)
C1 (Blue)15YEL/BLKVSS Signal
C1 (Blue)16 & 17—Not Used
C1 (Blue)18PPL/WHTDual Tank Fuel Module
C1 (Blue)19PPL/WHTHO2S Bank 1 Sensor 1 High
C1 (Blue)20PPLHO2S Bank 1 Sensor 2 High
C1 (Blue)21PPLHO2S Bank 2 Sensor 1 High
C1 (Blue)22PPL/WHTHO2S Bank 2 Sensor 2 High
C1 (Blue)23—Not Used
C1 (Blue)24TANHO2S Bank 1 Sensor 2 Low
C1 (Blue)25TAN/WHTHO2S Bank 1 Sensor 1 Low
C1 (Blue)26TAN/WHTHO2S Bank 2 Sensor 2 Low
C1 (Blue)27—Not Used
C1 (Blue)28PPLCKP Low
C1 (Blue)29LT GRN/BLKVSS Low
C1 (Blue)30PPL/WHTVSS Signal
C1 (Blue)31YELCKP Sensor 4x Signal
C1 (Blue)32—Not Used
C2 (Red)1—Not Used
C2 (Red)2WHTEVAP Canister Vent Solenoid Control
C2 (Red)3—Not Used
C2 (Red)4YEL/BLK2-3 Shift Solenoid Control
C2 (Red)5—Not Used
C2 (Red)6LT GRN1-2 Shift Solenoid Control
C2 (Red)7BRNTCC PWM Solenoid Control
C2 (Red)8BLKFuel Injector No. 1 Control
C2 (Red)9DK BLU/WHTFuel Injector No. 8 Control
C2 (Red)10BRNEGR Pintle Position Signal
C2 (Red)11LT GRN/BLKFuel Injector No. 2 Control
C2 (Red)12RED/BLKFuel Injector No. 7 Control
C2 (Red)13LT GRN/WHTIAC Coil B High
C2 (Red)14LT BLU/WHTIAC Coil A High
C2 (Red)15BLK/WHTFuel Injector No. 5 Control
C2 (Red)16YEL/BLKFuel Injector No. 6 Control
C2 (Red)17 & 18—Not Used
C2 (Red)19DK BLUKS Signal
C2 (Red)20—Not Used
C2 (Red)21LT GRNMAP Sensor Signal
C2 (Red)22TANIAT Sensor Signal
C2 (Red)23YELECT Sensor Signal
C2 (Red)24DK BLUTP Sensor Signal
C2 (Red)25DK GRNFuel Tank Vacuum Sensor Signal
C2 (Red)26—Not Used
C2 (Red)27YEL/BLKTFT Sensor Signal
C2 (Red)28YELMAF Sensor Signal
C2 (Red)29LT GRN/BLKIAC High
C2 (Red)30LT BLU/BLKIAC Low
C2 (Red)31LT BLU/BLKFuel Injector No. 4 Control
C2 (Red)32PNK/BLKFuel Injector No. 3 Control
C3 (Clear)1DK GRN/WHTA/C Compressor Clutch Relay Control
C3 (Clear)2DK GRN/WHTEVAP Canister Purge Solenoid Control
C3 (Clear)3—Not Used
C3 (Clear)4BLKECT/TP Sensor Ground
C3 (Clear)5—Not Used
C3 (Clear)6RED/BLKPressure Control Solenoid High
C3 (Clear)7DK BLU/WHTInput Shaft Speed Sensor Low
C3 (Clear)8RED/BLKInput Shaft Speed Sensor High
C3 (Clear)9WHTIC Control
C3 (Clear)10—Not Used
C3 (Clear)11REDTransmission Range C Input
C3 (Clear)12GRYTP Sensor Reference Voltage
C3 (Clear)13PPL/WHTFuel Level Signal
C3 (Clear)14DK BLUA/C Recirculation
C3 (Clear)15—Not Used
C3 (Clear)16LT BLU/WHTPressure Control Solenoid Low
C3 (Clear)17BLK/WHTPCM Ground
C3 (Clear)18BLK/WHTPCM Ground
C3 (Clear)19BLKSensor Ground (IAT/MAP/EGR)
C3 (Clear)20—Not Used
C3 (Clear)21ORGBattery Voltage
C3 (Clear)22DK BLUTransmission Range B Input
C3 (Clear)23PNKTransmission Range A Input
C3 (Clear)24—Not Used
C3 (Clear)25DK GRN/WHTA/C Request Signal
C3 (Clear)26—Not Used
C3 (Clear)27GRYReference Voltage (EGR/MAP)
C3 (Clear)28 & 29—Not Used
C3 (Clear)30DK GRNA/C Compressor Cycling Switch Signal
C3 (Clear)31 & 32—Not Used
C4 (Black)1DK GRN/WHTFuel Pump Relay Control
C4 (Black)2—Not Used
C4 (Black)3DK GRN/WHTVSS Output Signal (TCC/Radio/Cruise Control)
C4 (Black)4DK GRNVSS Output Signal (Speedometer)
C4 (Black)5BRN/WHTMIL Control
C4 (Black)6-9—Not Used
C4 (Black)10PPLBrake Signal
C4 (Black)11PPLSerial Data (Class II)
C4 (Black)12BLKDual Fuel Module Return
C4 (Black)13BRNIgnition Voltage
C4 (Black)14 & 15—Not Used
C4 (Black)16REDEGR Valve Feed
C4 (Black)17—Not Used
C4 (Black)18PNKIgnition Voltage
C4 (Black)19—Not Used
C4 (Black)20WHTEGR Valve Control
C4 (Black)21 & 23—Not Used
C4 (Black)24LT BLU/BLKCruise Engaged Signal
(1) (Схема №3)
(1)(Схема №3)

POWERTRAIN CONTROL MODULE (PCM) - 7.4L ("C" & "K" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 7.4L ("G" SERIES)

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1 & 2—Not Used
C1 (Blue)3BRN/WHTCMP Sensor 1x Signal
C1 (Blue)4-6—Not Used
C1 (Blue)7TANHO2S Bank 2 Sensor 1 Low
C1 (Blue)8PNK/BLKCMP Low
C1 (Blue)9PPLFuel Gauge
C1 (Blue)10-13—Not Used
C1 (Blue)14BRNAIR Relay Control (Calif. Only)
C1 (Blue)15YEL/BLKVSS Signal
C1 (Blue)16 & 17—Not Used
C1 (Blue)18PPL/WHTDual Tank Fuel Module
C1 (Blue)19PPL/WHTHO2S Bank 1 Sensor 1 High
C1 (Blue)20PPL/WHTHO2S Bank 2 Sensor 2 High
C1 (Blue)21PPLHO2S Bank 2 Sensor 1 High
C1 (Blue)22PPL/WHTHO2S Bank 1 Sensor 2 High
C1 (Blue)23—Not Used
C1 (Blue)24TAN/WHTHO2S Bank 2 Sensor 2 Low
C1 (Blue)25TAN/WHTHO2S Bank 1 Sensor 1 Low
C1 (Blue)26TANHO2S Bank 1 Sensor 2 Low
C1 (Blue)27—Not Used
C1 (Blue)28PPLCKP Low
C1 (Blue)29LT GRN/BLKVSS Low
C1 (Blue)30PPL/WHTVSS Signal
C1 (Blue)31YELCKP Sensor 4x Signal
C1 (Blue)32—Not Used
C2 (Red)1—Not Used
C2 (Red)2WHTEVAP Canister Vent Solenoid Control
C2 (Red)3—Not Used
C2 (Red)4YEL/BLK2-3 Shift Solenoid Control
C2 (Red)5—Not Used
C2 (Red)6LT GRN1-2 Shift Solenoid Control
C2 (Red)7BRNTCC PWM Solenoid Control
C2 (Red)8BLKFuel Injector No. 1 Control
C2 (Red)9DK BLU/WHTFuel Injector No. 8 Control
C2 (Red)10BRNEGR Pintle Position Signal
C2 (Red)11LT GRN/BLKFuel Injector No. 2 Control
C2 (Red)12RED/BLKFuel Injector No. 7 Control
C2 (Red)13LT GRN/WHTIAC Coil B High
C2 (Red)14LT BLU/WHTIAC Coil A High
C2 (Red)15BLK/WHTFuel Injector No. 5 Control
C2 (Red)16YEL/BLKFuel Injector No. 6 Control
C2 (Red)17 & 18—Not Used
C2 (Red)19DK BLUKS Signal
C2 (Red)20—Not Used
C2 (Red)21LT GRNMAP Sensor Signal
C2 (Red)22TANIAT Sensor Signal
C2 (Red)23YELECT Sensor Signal
C2 (Red)24DK BLUTP Sensor Signal
C2 (Red)25DK GRNFuel Tank Vacuum Sensor Signal
C2 (Red)26—Not Used
C2 (Red)27YEL/BLKTFT Sensor Signal
C2 (Red)28YELMAF Sensor Signal
C2 (Red)29LT GRN/BLKIAC High
C2 (Red)30LT BLU/BLKIAC Low
C2 (Red)31LT BLU/BLKFuel Injector No. 4 Control
C2 (Red)32PNK/BLKFuel Injector No. 3 Control
C3 (Clear)1DK GRN/WHTA/C Compressor Clutch Relay Control
C3 (Clear)2DK GRN/WHTEVAP Canister Purge Solenoid Control
C3 (Clear)3—Not Used
C3 (Clear)4BLKECT/TP Sensor Ground
C3 (Clear)5—Not Used
C3 (Clear)6RED/BLKPressure Control Solenoid High
C3 (Clear)7DK BLU/WHTInput Shaft Speed Sensor Low
C3 (Clear)8RED/BLKInput Shaft Speed Sensor High
C3 (Clear)9WHTIC Control
C3 (Clear)10—Not Used
C3 (Clear)11REDTransmission Range C Input
C3 (Clear)12GRYTP Sensor Reference Voltage
C3 (Clear)13PPL/WHTFuel Level Module (Single Tank)
C3 (Clear)14DK BLUA/C Recirculation
C3 (Clear)15—Not Used
C3 (Clear)16LT BLU/WHTPressure Control Solenoid Low
C3 (Clear)17BLK/WHTPCM Ground
C3 (Clear)18BLK/WHTPCM Ground
C3 (Clear)19BLKSensor Ground (IAT/MAP/EGR)
C3 (Clear)20—Not Used
C3 (Clear)21ORGBattery Voltage
C3 (Clear)22DK BLUTransmission Range B Input
C3 (Clear)23PNKTransmission Range A Input
C3 (Clear)24—Not Used
C3 (Clear)25DK GRN/WHTA/C Request Signal
C3 (Clear)26—Not Used
C3 (Clear)27GRYReference Voltage (EGR/MAP)
C3 (Clear)28 & 29—Not Used
C3 (Clear)30DK GRNA/C Compressor Cycling Switch Signal
C3 (Clear)31 & 32—Not Used
C4 (Black)1DK GRN/WHTFuel Pump Relay Control
C4 (Black)2—Not Used
C4 (Black)3DK GRN/WHTVSS Output Signal (TCC/Radio/Cruise Control)
C4 (Black)4DK GRNVSS Output Signal (Speedometer)
C4 (Black)5BRN/WHTMIL Control
C4 (Black)6—Not Used
C4 (Black)7DL GRNInlet Air Actuator
C4 (Black)8—Not Used
C4 (Black)9DL BLUAuxiliary Electric Cooling Fan
C4 (Black)10PPLBrake Signal
C4 (Black)11PPLSerial Data (Class II)
C4 (Black)12BLKDual Fuel Module Return
C4 (Black)13BRNIgnition Voltage
C4 (Black)14 & 15—Not Used
C4 (Black)16REDEGR Valve Feed
C4 (Black)17—Not Used
C4 (Black)18PNKIgnition Voltage
C4 (Black)19BLK/WHT4WD Engaged Signal
C4 (Black)20WHTEGR Valve Control
C4 (Black)21 & 22—Not Used
C4 (Black)23GRY/BLKTransfer Case High Low Switch
C4 (Black)24LT BLU/BLKCruise Engaged Signal
(1) (Схема №3)
(1)(Схема №3)

POWERTRAIN CONTROL MODULE (PCM) - 7.4L ("G" SERIES) (1)

POWERTRAIN CONTROL MODULE (PCM) - 7.4L ("P" SERIES)

ConnectorTerminal No.Wire ColorFunction
C1 (Blue)1 & 2—Not Used
C1 (Blue)3BRN/WHTCMP Sensor 1x Signal
C1 (Blue)4-6—Not Used
C1 (Blue)7TANHO2S Bank 2 Sensor 1 Low
C1 (Blue)8PNK/BLKCMP Low
C1 (Blue)9PPLFuel Gauge
C1 (Blue)10-13—Not Used
C1 (Blue)14BRNAIR Relay Control (Calif. Only)
C1 (Blue)15YEL/BLKVSS Signal
C1 (Blue)16 & 17—Not Used
C1 (Blue)18PPL/WHTDual Tank Fuel Module
C1 (Blue)19PPL/WHTHO2S Bank 1 Sensor 1 High
C1 (Blue)20PPLHO2S Bank 1 Sensor 2 High
C1 (Blue)21PPLHO2S Bank 2 Sensor 1 High
C1 (Blue)22PPL/WHTHO2S Bank 2 Sensor 2 High
C1 (Blue)23—Not Used
C1 (Blue)24TANHO2S Bank 1 Sensor 2 Low
C1 (Blue)25TAN/WHTHO2S Bank 1 Sensor 1 Low
C1 (Blue)26TAN/WHTHO2S Bank 2 Sensor 2 Low
C1 (Blue)27—Not Used
C1 (Blue)28PPLCKP Low
C1 (Blue)29LT GRN/BLKVSS Low
C1 (Blue)30PPL/WHTVSS Signal
C1 (Blue)31YELCKP Sensor 4x Signal
C1 (Blue)32—Not Used
C2 (Red)1-3—Not Used
C2 (Red)4YEL/BLK2-3 Shift Solenoid Control
C2 (Red)5—Not Used
C2 (Red)6LT GRN1-2 Shift Solenoid Control
C2 (Red)7BRNTCC PWM Solenoid Control
C2 (Red)8BLKFuel Injector No. 1 Control
C2 (Red)9DK BLU/WHTFuel Injector No. 8 Control
C2 (Red)10BRNEGR Pintle Position Signal
C2 (Red)11LT GRN/BLKFuel Injector No. 2 Control
C2 (Red)12RED/BLKFuel Injector No. 7 Control
C2 (Red)13LT GRN/WHTIAC Coil B High
C2 (Red)14LT BLU/WHTIAC Coil A High
C2 (Red)15BLK/WHTFuel Injector No. 5 Control
C2 (Red)16YEL/BLKFuel Injector No. 6 Control
C2 (Red)17 & 18—Not Used
C2 (Red)19DK BLUKS Signal
C2 (Red)20—Not Used
C2 (Red)21LT GRNMAP Sensor Signal
C2 (Red)22TANIAT Sensor Signal
C2 (Red)23YELECT Sensor Signal
C2 (Red)24DK BLUTP Sensor Signal
C2 (Red)25 & 26—Not Used
C2 (Red)27YEL/BLKTFT Sensor Signal
C2 (Red)28YELMAF Sensor Signal
C2 (Red)29LT GRN/BLKIAC High
C2 (Red)30LT BLU/BLKIAC Low
C2 (Red)31LT BLU/BLKFuel Injector No. 4 Control
C2 (Red)32PNK/BLKFuel Injector No. 3 Control
C3 (Clear)1DK GRN/WHTA/C Compressor Clutch Relay Control
C3 (Clear)2DK GRN/WHTEVAP Canister Purge Solenoid Control
C3 (Clear)3—Not Used
C3 (Clear)4BLKECT/TP Sensor Ground
C3 (Clear)5—Not Used
C3 (Clear)6RED/BLKPressure Control Solenoid High
C3 (Clear)7DK BLU/WHTInput Shaft Speed Sensor Low
C3 (Clear)8RED/BLKInput Shaft Speed Sensor High
C3 (Clear)9WHTIC Control
C3 (Clear)10—Not Used
C3 (Clear)11REDTransmission Range C Input
C3 (Clear)12GRYTP Sensor Reference Voltage
C3 (Clear)13PPL/WHTFuel Level Module (Single Tank)
C3 (Clear)14DK BLUA/C Recirculation
C3 (Clear)15—Not Used
C3 (Clear)16LT BLU/WHTPressure Control Solenoid Low
C3 (Clear)17BLK/WHTPCM Ground
C3 (Clear)18BLK/WHTPCM Ground
C3 (Clear)19BLKSensor Ground (EGR/IAT/MAP)
C3 (Clear)20—Not Used
C3 (Clear)21ORGBattery Voltage
C3 (Clear)22DK BLUTransmission Range B Input
C3 (Clear)23PNKTransmission Range A Input
C3 (Clear)24—Not Used
C3 (Clear)25DK GRN/WHTA/C Request Signal
C3 (Clear)26—Not Used
C3 (Clear)27GRYEGR/MAP Reference Voltage
C3 (Clear)28 & 29—Not Used
C3 (Clear)30DK GRNA/C Compressor Cycling Switch Signal
C3 (Clear)31 & 32—Not Used
C4 (Black)1DK GRN/WHTFuel Pump Relay Control
C4 (Black)2—Not Used
C4 (Black)3DK GRN/WHTVSS Output Signal (TCC/Radio/Cruise Control)
C4 (Black)4DK GRNVSS Output Signal (Speedometer)
C4 (Black)5BRN/WHTMIL Control
C4 (Black)6-8—Not Used
C4 (Black)9DK BLUAuxiliary Elactric Cooling Fan
C4 (Black)10PPLBrake Signal
C4 (Black)11PPLSerial Data (Class II)
C4 (Black)12—Not Used
C4 (Black)13BRNIgnition Voltage
C4 (Black)14 & 15—Not Used
C4 (Black)16REDEGR Valve Feed
C4 (Black)17—Not Used
C4 (Black)18PNKIgnition Voltage
C4 (Black)19—Not Used
C4 (Black)20WHTEGR Valve Control
C4 (Black)21-23—Not Used
C4 (Black)24LT BLU/BLKCruise Engaged Signal
(1) (Схема №3)
(1)(Схема №3)

POWERTRAIN CONTROL MODULE (PCM) - 7.4L ("P" SERIES) (1)

ENGINE SENSORS & SWITCHES

Note. For additional sensor testing specifications, see appropriate SENSOR OPERATING RANGE CHARTS article.

Manufacturer does not provide testing procedures for many individual systems and components. For sensor and switch testing not listed, perform related DTC testing procedure. See appropriate SELF-DIAGNOSTICS article.

  1. Engine Coolant Temperature (ECT) Sensor A malfunction in ECT sensor circuit can set a related Diagnostic Trouble Code (DTC). For testing procedure, see appropriate SELF-DIAGNOSTICS article. An out-of-calibration ECT sensor may not set a DTC. Use the following procedure to test sensor calibration. Disconnect ECT sensor harness connector. Using an ohmmeter, measure resistance of ECT sensor at specified temperatures. See «ECT SENSOR RESISTANCE VALUES»(ref-177-S33638189782000030800000) table. Resistance should be high when engine is cold and drop as engine warms. With vehicle sitting overnight, IAT sensor and ECT sensor should have close to the same resistance reading. If resistance is not within specification, replace ECT sensor. ECT SENSOR RESISTANCE VALUES Temperature °F (°C) Ohms 212 (100) 177 158 (70) 467 104 (40) 1459 68 (20) 3520 32 (0) 9420 5 (-15) 21,450 -40 (-40) 100,700
  2. Intake Air Temperature (IAT) Sensor A malfunction in IAT sensor circuit can set a related Diagnostic Trouble Code (DTC). For testing procedure, see appropriate SELF-DIAGNOSTICS article. An out-of-calibration IAT sensor may not set a DTC. Use the following procedure to test sensor calibration. Disconnect IAT sensor harness connector. Using an ohmmeter, measure resistance of IAT sensor at specified temperatures. See «IAT SENSOR RESISTANCE VALUES»(ref-177-S05304027462000030800000) table. Resistance should be high when air temperature is cold and drop as air temperature warms. With vehicle sitting overnight, ECT sensor and IAT sensor should have close to the same resistance reading. If resistance is not within specification, replace IAT sensor. IAT SENSOR RESISTANCE VALUES Temperature °F (°C) Ohms 212 (100) 177 158 (70) 467 104 (40) 1459 68 (20) 3520 32 (0) 9420 5 (-15) 21,450 -40 (-40) 100,700

Note. MAP sensor circuit diagnosis is only available from manufacturer for 2.2L and 3.4L engines.

  1. MAP Sensor Circuit Diagnosis (2.2L) If On-Board Diagnostic (OBD) system check has been performed, go to next step. If On-Board Diagnostic (OBD) system check has not been performed, perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article.
  2. Install scan tool and retrieve DTCs. If no MAP sensor related DTCs are set, go to next step. If any MAP sensor related DTCs are set, perform appropriate DTC test. See appropriate SELF-DIAGNOSTICS article.
  3. Turn ignition on with engine off. Compare MAP sensor reading with that of a known-good vehicle. If voltage readings are within 0.4 volt of each other, go to next step. If voltage readings are not within 0.4 volt of each other, go to step 5 .
  4. Disconnect and plug vacuum source to MAP sensor. Connect a hand-held vacuum pump to vacuum source port on MAP sensor. Apply 10 in. Hg of vacuum to MAP sensor while observing MAP sensor reading on scan tool. Subtract this reading from the reading obtained in step 3) . If difference is greater than 1.5 volts, go to step 6 . If difference is not greater than 1.5 volts, go to step 7 .
  5. Replace MAP sensor. After repairs, go to step 9 .
  6. Check MAP sensor vacuum source for leakage or restriction, and that vacuum source only supplies MAP sensor. If problem exists, go to step 8 . If problem does not exist, go to step 9 .
  7. Check for poor connection at MAP sensor. If poor connection does not exist, go to step 5 . If poor connection exists, repair as necessary and go to step 9 .
  8. Repair leak or restriction in MAP sensor vacuum source as necessary. After repairs, go to next step.
  9. Operate vehicle under conditions which original symptom was noted. If system operates properly, system is okay at this time. If system does not operate properly, go to step 2 .
  1. MAP Sensor Circuit Diagnosis (3.4L) If On-Board Diagnostic (OBD) system check has been performed, go to next step. If On-Board Diagnostic (OBD) system check has not been performed, perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article.
  2. Check for the following: Missing or damaged MAP sensor seal. Damage, disconnected or misrouted vacuum hoses. Intake manifold vacuum leaks. Vacuum leaks at throttle body. Vacuum leaks in EGR system. Faulty, missing or incorrectly installed PCV valve. If a problem does not exist, go to next step. If a problem exists, repair as necessary and go to step 14 .
  3. Disconnect MAP sensor harness connector. Using scan tool, observe MAP sensor parameter. If zero volts is displayed, go to next step. If zero volts is not displayed, go to step 12 .
  4. Using a test light connected to battery voltage, probe MAP sensor signal circuit (Light Green wire) at MAP sensor harness connector. See appropriate wiring diagram in WIRING DIAGRAMS article. Observe MAP sensor parameter on scan tool. If 4.95 volts is displayed, go to next step. If 4.95 volts is not displayed, go to step 8 .
  5. Using a fused jumper wire, connect MAP sensor signal circuit (Light Green wire) and MAP sensor reference voltage circuit (Gray wire) at MAP sensor harness connector. See appropriate wiring diagram in WIRING DIAGRAMS article. Observe MAP sensor parameter on scan tool. If scan tool displays 4.95 volts, go to next step. If scan tool does not display 4.95 volts, go to step 7 .
  6. Turn ignition off. Disconnect PCM harness connectors. Check MAP sensor ground circuit (Orange/Black wire) for open, high resistance or poor connection at PCMs. If problem does not exist, go to step 10 . If problem exists, repair as necessary and go to step 14 .
  7. Check MAP sensor reference voltage circuit (Gray wire) for open, high resistance or poor connection at PCM. If problem does not exist, go to step 9 . If problem exists, repair as necessary and go to step 14 .
  8. Turn ignition off. Disconnect PCM harness connectors. Check MAP sensor signal circuit (Light Green wire) for open, high resistance, short to ground or short to sensor. If problem does not exist, go to next step. If problem exists, repair as necessary and go to step 14 .
  9. Check MAP sensor signal circuit (Light Green wire) for poor connection at PCM. If problem does not exist, go to step 13 . If problem exists, repair as necessary and go to step 14 .
  10. Check for poor connection at MAP sensor. If problem does not exist, go to next step. If problem exists, repair as necessary and go to step 14 .
  11. Replace MAP sensor. After repairs, go to step 14 .
  12. Turn ignition off. Disconnect PCM harness connector. Turn ignition on. Check MAP sensor signal circuit (Light Green) for a short to voltage or short to MAP sensor reference voltage circuit (Gray wire). If problem does not exist, go to next step. If problem exists, repair as necessary and go to step 14 .
  13. Replace PCM. Program PCM. Perform VTD password relearn procedure and crankshaft variation learn procedure. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION. After repairs, go to next step.
  14. Start engine and let idle. While observing MAP sensor parameter on scan tool, increase engine RPM. If MAP sensor value changes, system is okay. If MAP sensor value does not change, go to step 2 .
  1. Engine Oil Level Switch Diagnosis If On-Board Diagnostic (OBD) system check has been performed, go to next step. If On-Board Diagnostic (OBD) system check has not been performed, perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article.
  2. Using scan tool, observe engine oil level display. If scan tool does not display OK, go to next step. If scan tool displays OK, check for poor connections at engine oil level switch and PCM. If poor connection exists, repair as necessary. If poor connection does not exist, perform warning light diagnosis. See «PCM CONTROLLED WARNING LIGHTS & GAUGES»(ref-177-S01071420122000030800000) under MISCELLANEOUS CONTROLS.
  3. Turn ignition off. Disconnect PCM harness connectors. Using a test light connected to battery voltage, probe engine oil level switch signal circuit (Brown wire) at PCM harness connector. If test light does not illuminate, go to next step. If test light illuminates, go to step 7 .
  4. Ensure ignition is off. Reconnect PCM harness connectors. Turn ignition on. Raise and support vehicle. Disconnect engine oil level switch harness connector. Using DVOM, measure voltage between engine oil level switch harness connector terminals. If battery voltage does not exist, go to next step. If battery voltage exists, go to step 8 .
  5. Using DVOM, measure voltage between chassis ground and engine oil level switch signal circuit (Brown wire) at engine oil level switch harness connector. If battery voltage does not exist, go to next step. If battery voltage exists, go to step 9 .
  6. Check for open in engine oil level switch signal circuit (Brown wire) between engine oil level switch and PCM. If open exists, repair as necessary and go to step 12 . If open does not exist, check for poor connections at engine oil level switch and PCM. If poor connection exists, repair as necessary. If poor connection does not exist, perform warning light diagnosis. See «PCM CONTROLLED WARNING LIGHTS & GAUGES»(ref-177-S01071420122000030800000) under MISCELLANEOUS CONTROLS.
  7. Check for poor connections at PCM. If poor connection exists, repair as necessary and go to step 12 . If poor connection does not exist, go to step 11 .
  8. Check for poor connections at engine oil level switch. If poor connection exists, repair as necessary and go to step 12 . If poor connection does not exist, go to step 10 .
  9. Locate and repair open in engine oil level switch ground circuit (Black/White wire). After repairs, go to step 12 .
  10. Replace engine oil level switch. After repairs, go to step 12 .
  11. Replace PCM. Program PCM. Perform VTD password relearn procedure and crankshaft variation learn procedure. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION. After repairs, go to next step.
  12. Start engine and allow to warm to normal operating temperature. Turn ignition off. Allow engine to cool for 15 minutes. Turn ignition on. Using scan tool, observe engine oil level display. If scan tool displays OK, system is okay. If scan tool does not display OK, go to step 3 .

MODULES, MOTORS, RELAYS & SOLENOIDS

Note. Manufacturer does not provide testing procedures for many individual systems and components. For module, motor, relay and solenoid testing not listed, perform related DTC testing procedure. See appropriate SELF-DIAGNOSTICS article.

A/C Compressor Clutch Relay

See appropriate MANUAL A/C-HEATER SYSTEMS or AUTOMATIC A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING.

Fuel Pump Relay

Fuel pump relay is located in underhood fuse/relay block. To test fuel pump relay, see FUEL SYSTEM ELECTRICAL CIRCUIT under appropriate NO START - ENGINE CRANKS OKAY in appropriate BASIC DIAGNOSTIC PROCEDURES article.

EVAP Canister Purge Solenoid

See FUEL EVAPORATION under EMISSION SYSTEMS & SUB-SYSTEMS (GASOLINE).

Idle Air Control (IAC) Valve

See IDLE AIR CONTROL (IAC) SYSTEM DIAGNOSIS under IDLE CONTROL SYSTEM.

FUEL SYSTEM (GASOLINE)

Note. For fuel system pressure testing, see appropriate BASIC DIAGNOSTIC PROCEDURES article.

Manufacturer does not provide testing procedures for many individual systems and component. For fuel system testing not listed, perform related DTC testing procedure. See appropriate SELF-DIAGNOSTICS article.

Fuel Pressure Regulator (CSI)

Fuel pressure regulator is a vacuum-controlled diaphragm type, which uses manifold vacuum to modify fuel pressure to compensate for engine load fuel requirements. Connect fuel pressure gauge to fuel pressure service port. Start engine and note fuel pressure. Disconnect vacuum hose from fuel pressure regulator. Fuel pressure should increase 4-10 psi (.28-.70 kg/cm 2 ). If pressure does not increase 4-10 psi (.28-.70 kg/cm 2 ), check for presence of manifold vacuum at signal line. If vacuum is not present, check for kinked, cut or split vacuum hose or plugged throttle body vacuum port. If vacuum is present and no pressure change occurs, replace fuel pressure regulator.

Fuel Pressure Regulator (SFI)

Fuel pressure regulator is mechanically controlled by internal spring pressure. Regulator is adjusted at factory and is not serviceable. If fuel pressure is too low, check for restricted delivery line. Also, check fuel pump pressure and volume. If fuel pressure is too high, check for restricted fuel tank return line or fuel filter. If no faults are found and pressure is too high or too low, replace fuel pressure regulator.

Fuel Pump Oil Pressure Switch (Back-Up Circuit)

To test fuel pump oil pressure switch (fuel pump back-up circuit), start engine. With engine running, disconnect fuel pump relay. If engine stalls, fuel pump oil pressure switch is faulty. If vehicle continues to run, switch is okay.

FUEL CONTROL

Note. Retrieve DTCs and perform appropriate DTC test before performing FUEL INJECTOR CIRCUIT DIAGNOSIS. See appropriate SELF-DIAGNOSTICS article. Also, ensure all mechanical and ignition coil/module circuit malfunctions are repaired before performing fuel injector circuit diagnosis.

See RELAYS under MODULES, MOTORS, RELAYS & SOLENOIDS.

FUEL SYSTEM (DIESEL)

Note. Manufacturer does not provide testing procedures for many individual systems and component. For fuel system testing not listed, perform related DTC testing procedure. See appropriate SELF-DIAGNOSTICS article.

Note. For complete system testing and diagnosis, see SELF-DIAGNOSTICS - DIESEL article.

Function Check

  1. With ignition on, engine not running and at room temperature, glow plugs are on for 4-6 seconds, and then off for about 4.5 seconds. Following this on-and-off cycle, glow plugs are on for about one second and off for about 3 seconds. The glow plugs continue to cycle on and off in this time sequence for about 16 seconds.
  2. If engine is cranked during or after the above sequence, glow plugs will cycle on and off for a total duration of 25 seconds after ignition switch is returned from crank position, whether engine starts or not. Engine does not have to be running to terminate glow plug cycling.

GLOW PLUG RELAY

  1. Ensure coolant temperature is less than 80°F (27°C) before beginning test. Place ignition switch in RUN position and allow glow plugs to cycle. After 2 minutes, crank engine for one second. It is NOT important that engine starts. Return ignition switch to RUN position. Glow plugs should cycle on at least once.
  2. If glow plugs do not cycle, disconnect glow plug relay (relay is located on top rear of engine). Connect test light between Pink wire terminal of harness connector and ground. With ignition switch in RUN position, test light should be off. Test light should illuminate when engine is cranked.
  3. If test light does not illuminate as specified, repair short or open in engine harness Pink wire. If test light illuminates as specified but glow plugs do not cycle, replace glow plug relay.

IDLE CONTROL SYSTEM

Note. For idle control system testing not listed, perform related DTC testing procedure. See appropriate SELF-DIAGNOSTICS article.

IGNITION SYSTEM

Note. For basic ignition system checks, see appropriate BASIC DIAGNOSTIC PROCEDURES article.

For ignition system testing not listed, perform related DTC testing procedure. See appropriate SELF-DIAGNOSTICS article.

Ignition Control Circuit (Gasoline Engines)

An open or short to ground in Ignition Control (IC) or by-pass circuit will cause PCM/VCM to turn on Malfunction Indicator Light (MIL) and confirm fault by setting a related DTC. See appropriate SELF-DIAGNOSTICS article.

Knock Sensor Circuit (Models Using External Spark Controller Module)

  1. An open or short circuit on IC module control wire to PCM/VCM will cause a loss of 12-volt IC module signal. This will cause PCM/VCM to fully retard ignition timing.
  2. Install scan tool. Using a metal object, tap on engine next to knock sensor and note knock parameter. Knock should be indicated on scan tool.
  3. If a scan tool is not available, backprobe PCM/VCM knock sensor signal terminal with a DVOM. With engine idling, 8-12 volts should be present at this terminal. Using a metal object, tap on engine close to knock sensor. Voltage signal at PCM/VCM terminal should drop to zero volts, and then return to original voltage when knock signal ceases.
  4. If voltage signal does not respond as described, check knock sensor-to-module signal. On vehicles equipped with automatic transmission, it may be necessary to place transmission in Drive for timing change to occur.

Knock Sensor Circuit (Models Using Knock Sensor With Internal Spark Controller Module)

  1. An open or short circuit on knock sensor wire to PCM/VCM will set a related DTC. A false detonation signal will not cause PCM/VCM to set a DTC.
  2. Install scan tool. Using a metal object, tap on engine next to knock sensor and note knock parameter. Knock should be indicated on scan tool.
  3. If a scan tool is not available, connect tachometer to engine. Start engine and hold RPM above idle. Using a metal object, tap on engine close to knock sensor. A noticeable decrease in engine RPM should occur. If no RPM decrease occurred, check knock sensor-to-PCM/VCM circuit.
  4. On vehicles equipped with automatic transmission, it may be necessary to place transmission in Drive for timing change to occur.

EMISSION SYSTEMS & SUB-SYSTEMS (GASOLINE)

Note. For emission and subsystem testing not listed, perform related DTC testing procedure. See appropriate SELF-DIAGNOSTICS article.

FUEL EVAPORATION

Note. Ensure all vacuum line and EVAP system components are not damaged or missing before proceeding with this test.

Required Service

The PCV system may require service for obstructions if any of the following conditions exist

  1. Rough idle.
  2. Stalling or low idle speed.
  3. Oil leaks.
  4. Oil in air cleaner.
  5. Sludge in engine.

A leaking PCV valve or hose could cause

  1. Rough idle.
  2. Stalling.
  3. High idle speed.

If engine idles rough, check for clogged PCV valve, or for plugged or broken PCV hoses BEFORE adjusting idle. Check PCV valve application to ensure valve is fitted. Replace PCV valve if required.

Checking PCV Valve Function

  1. Disconnect PCV valve vacuum hose from cylinder head cover. Run engine at idle. Place thumb over open end of PCV valve vacuum hose to check for vacuum. If vacuum does not exist, check for obstruction in source vacuum supply. If source vacuum supply is okay, replace PCV valve.
  2. Turn ignition off. Remove PCV valve. Shake valve and listen for rattle of check valve inside PCV valve. If a clear rattle is not heard, replace PCV valve.
  3. Visually inspect valve for varnish or deposits that may make PCV valve operation sticky or restricted, or cause incomplete seating of valve. Replace as necessary.
  4. Engine must be sealed for PCV system to function as designed. If leakage, sludging or dilution of oil is noted and PCV system is functioning properly, check engine for cause and repair as required to ensure PCV system will continue to function properly.
  5. An engine operating without any crankcase ventilation can be damaged, so it is important to replace PCV valve and air cleaner breather (if equipped) at regular intervals (at least every 30,000 miles). Check all hoses and clamps for failure or deterioration.

EMISSION SYSTEMS & SUB-SYSTEMS (DIESEL)

Note. For emission and subsystem testing not listed, perform related DTC testing procedure. See appropriate SELF-DIAGNOSTICS article.

Crankcase Depression Regulator (CDR) Valve

To test CDR valve, connect one end of a water manometer to engine oil dipstick tube. Leave other end of manometer open to atmosphere. Unplug rubber vent tube from turbo inlet elbow. Install air cleaner and run engine. CDR valve specification is one in. H 2 O at idle to 3-4 in. H 2 O at full load. Add amount of distance water travels down one side of gauge to distance water travels up other side of gauge to obtain reading.

EGR Valve Check

With engine off, disconnect vacuum hose to EGR valve. Connect vacuum pump to EGR and apply 10 in. Hg. EGR diaphragm should move up and stay up for at least 20 seconds. If EGR does not operate as specified, replace EGR valve.

VACUUM PUMP

Connect vacuum gauge to vacuum pump inlet (small fitting). DO NOT plug or disconnect outlet fitting. With engine idling, vacuum should be 18 in. Hg one minute after start. If vacuum is not as specified, check for belt slippage, vacuum leaks or other obvious defects. If no defects are present, replace vacuum pump.

MISCELLANEOUS CONTROLS

Note. Although some of the controlled devices listed here are not technically engine performance components, they can affect driveability if they malfunction.

Manufacturer does not provide testing procedures for many individual systems and components. For system and component testing not listed, perform related DTC testing procedure. See appropriate SELF-DIAGNOSTICS article.

A/C COMPRESSOR CLUTCH CONTROLS

Note. For A/C compressor clutch circuit testing, see appropriate MANUAL A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING. See appropriate wiring diagram in WIRING DIAGRAMS article for terminal and wire color identification.

FWD Vans

To provide improved idle quality, maintain Wide Open Throttle (WOT) performance and provide A/C system protection, compressor clutch is controlled by PCM.

The A/C compressor clutch relay is controlled by PCM according to information received from A/C refrigerant pressure sensor and various other sensors. This allows PCM to increase idle speed before engaging compressor clutch. PCM will disable compressor clutch during WOT, when refrigerant pressure is incorrect or if coolant temperature exceeds a predetermined value. PCM inhibits compressor clutch operation when engine speed is greater than 4500 RPM for 5 seconds, or when throttle angle exceeds 90 percent.

Trucks & RWD Vans

The A/C compressor clutch relay is controlled by PCM. The PCM improves idle quality by delaying compressor clutch engagement until idle speed is increased, or disengages compressor clutch when idle speed is too low. Compressor clutch is cycled by PCM. The PCM smooths cycling of compressor clutch by adding fuel the instant compressor clutch is applied.

ELECTRIC COOLING FAN CONTROL

Note. For electric cooling fan circuit testing, see ELECTRIC COOLING FANS article in AIR CONDITIONING & HEATING. See appropriate wiring diagram in WIRING DIAGRAMS article for terminal and wire color identification.

All FWD and some RWD vehicles use an electric cooling fan. The electric cooling fan is used for radiator and A/C condenser cooling. Cooling fan operates when A/C is on and when engine coolant temperature exceeds a specific value. One or more cooling fan relays may be used. Some RWD trucks, vans and motorhomes are equipped with an auxiliary electric cooling fan.

TRANSMISSION

Note. Computerized transmission controls are also covered in greater detail in appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS. For component circuit identification, see appropriate wiring diagram in WIRING DIAGRAMS article.

More articles — Engine Control System & Component Tests