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Last Updated

08/31/2003

 


ECM Connector "A" (Orange)

ECM Connector "A" (Orange) '91-'93 VIN X 3.4 TDC

Pin Function CKT# Wire Color Component Connector Cavity Codes Affect. Possible Symptoms From Faulty Circuit
A1 IAC "A" High

441

Lt. Blue/White IAC Valve Connector "D" 35 (3) High or Low Idle, Unstable or incorrect Idle
A2 IAC "B" Low 444 Lt. Green/Black IAC Valve Connector "A" 35 (3) High or Low Idle, Unstable or incorrect Idle
A3 Fan #2 Control 473 Dk. Blue/White Fan Control Relay #2 Connector "#1" None Inoperative Fan, Fan runs all the time
A4 EGR Solenoid #1 697 Lt. Blue Digital EGR Valve Connector "A" 32 Rough Idle, Spark Knock, Stalls after cold start, Surge during cruise
A7 IAC "A" Low 442 Lt. Blue/Black IAC Valve Connector "C" 35 (3) High or Low Idle, Unstable or incorrect Idle
A8 IAC "B" High 443 Lt. Green/White IAC Valve Connector "B" 35 (3) High or Low Idle, Unstable or incorrect Idle
A9 Fan #1 Control 335 Dk. Green/White Fan Control Relay #1 Connector "#1"" None Inoperative Fan, Fan runs all the time
A10 Canister Purge 428 Dk. Green/Yellow CPC Solenoid Connector "B" None Fuel Loss or Fuel Vapor Odor, Poor Idle, Stalling, Poor Driveability
A11 ESC Signal 496 Dk. Blue Knock Sensor 43 (3) Lack of Performance, Spark Knock
A12 A/C Relay Control 459 Dk. Green/White A/C Relay Connector #2 None No A/C Clutch Engagement
A13 "B" Shift Solenoid 582 Lt. Blue TCC Solenoid Connector "G" None No TCC, Poor Fuel Economy, Chugging or Surge Condition
A16 O2 Signal 412 Purple Oxygen Sensor 13, 45 (3) Rich Exhaust, Exhaust Odor, Rough or Incorrect Idle, Hesitation, Poor Performance
A18 "A" Shift Solenoid (4T60E) 581 Orange TCC Solenoid Connector "F" None No TCC, Poor Fuel Economy, Chugging or Surge Condition
A18 Air Pump Relay (3.4 Only) Air Solenoid (M/T 3.1L) 429 Black/Pink Air Divert Relay Connector "#1" to Air Pump and Diverter Valve None Inoperative Air Pump Relay and Diverter Valve or Solenoid
A19 EGR Solenoid #2 698 Brown Digital EGR Valve Connector "B" 32 Rough Idle, Spark Knock, Stalls after Cold Start, Surge during Cruise
A20 Fuel Pump Signal 120 Gray Fuel Pump Relay Connector "#1" Bulkhead Connector "A2" OPS Connector "C" 54 Hard to Start
A22 ECM Sensor Ground 413 Tan Engine Ground 13, 44 (3) Rough or Incorrect Idle, Lean Exhaust, Poor Performance

 

(1) Open Circuit

(2) Grounded Circuit

(3) Open/Grounded Circuit

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