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Last Updated

08/31/2003

 


ECM Connector "C" (Green)

ECM Connector "C" (Green) '91-'93 VIN X 3.4 TDC

Pin Function CKT# Wire Color Component Connector Cavity Codes Affect. Possible Symptoms From Faulty Circuit
C2 Mag VSS Signal Low 401 Purple Vehicle Speed Sensor (VSS) Connector "B" 24 (3) No VSS Signal, Inoperative Speedometer, Inoperative Cruise Control
C3 DIS Bypass 424 Tan/Black DIS Module Six Pin Connector "A" 42 (3) Surge, Hesitation, Lack of Performance
C4 IAT Signal 472 Tan IAT Sensor Connector "B" 25 (1) Poor Performance, Hard to Start
C5 Sensor Grounds, MAP, IAT, A/C Pressure Sensor 802 Black MAP Sensor Connector "A", IAT Sensor Connector "A", A/C Pressure Sensor Connector "A" 33, 23, 66

 (1)

Rough or Unstable Idle, Hard to Start, Sag or Hesitation, Poor Performance, No A/C
C6 Injector Ground 450 Black/White Engine Ground None Cranks but will not start if both injector grounds open, Check grounds at engine block, DIS Module, P/S Pressure Switch, Injector Driver Grounds, Transmission Neutral Safety Switch
C7 5 Volt Reference MAP and A/C Pressure Sensor 474 Gray MAP Sensor Connector "C", A/C Pressure Sensor Connector "B" 33, 34, 66

 (1)

Lack of Power, Rough Idle Surge, hesitation, Poor Performance
C8 Mag VSS Signal High 400 Yellow Vehicle Speed Sensor (VSS) Connector "A" 24 (3) No VSS Signal, Inoperative Speedometer, Inoperative Cruise Control
C9 EST Control 423 White DIS Module Six Pin Connector "B" 42 (3) Surge, Hesitation, Runs rough, Stalls, Lack of Performance
C10 Sensor Ground 808 Black TPS Connector "B", CTS Connector "A" 14, 21 (1) Hard to Start, High Idle, Sag or Hesitation
C12 TPS Reference 416 Gray TPS Connector "A" 21, 22 (3) High Idle, Surge, Lack of Performance
C13 EGR Solenoid #3 699 Red Digital EGR Valve Connector "C" 35 (3) High or Low Idle, Stalls, Unstable or Incorrect Idle
C15 TPS Signal 417 Dk. Blue TPS Connector "C" 22 (1) High Idle, Surge, Lack of Performance
C16 Coolant Temperature Signal 410 Yellow CTS Connector "B" 14, 15 (3) Hard to Start, Rough Idle, Lack of Performance, Exhaust Odor
C17 A/C Request 66 Lt. Green Bulkhead Connector C3, A/C Selector Switch None No A/C Clutch Engagement
C20 4th Gear Signal

C20 2nd Gear Switch (3T40 Only)

446

232

Lt. Blue

White

Tcc Solenoid

Connector "B", Connector "C"

None No 2nd or 4th Gear Switch, Poor Fuel Economy, Chugging or Surge Condition
C21 A/C Pressure Signal 732 Dk. Green A/C Pressure Sensor Connector "C" 66 (1) No A/C
C22 MAP Sensor 432 Lt. Green MAP Sensor Connector "B" 34 (3) Lack of Performance, Rough Idle, Surge

 

(1) Open Circuit

(2) Grounded Circuit

(3) Open/Grounded Circuit

Copyright 2003. All Rights Reserved.