Electronic/Powertrain Control Module (ECM/PCM)

ECM Wiring Diagram (1 of 3):

B5 = SERIAL DATA
B3 = DIAGNOSTIC TEST
D12 = SYSTEM GROUND
A22 = O2 SENSOR GROUND
C6 = SYSTEM GROUND
A16 = OXYGEN SENSOR SIGNAL
C8 = VSS INPUT
C2 = VSS INPUT
B8 = VSS OUTPUT
C16 = COOLANT TEMPERATURE SIGNAL
C5 = SENSOR GROUND
C15 = TPS SIGNAL
C12 = 5 VOLT REFERENCE
C7 = 5 VOLT REFERENCE
C22 = MAP SIGNAL
C10 = SENSOR GROUND
C4 = MAT SIGNAL
A1 = IAC COIL "A" HIGH
A7 = IAC COIL "A" LOW
A8 = IAC COIL "B" HIGH
A2 = IAC COIL "B" LOW

ECM Wiring Diagram (2 of 3):

D11 = PARK/NEUTRAL SWITCH (A/T)
D16 = POWER STEERING PRESSURE SIGNAL
B1 = SERVICE ENGINE SOON LIGHT CONTROL
B7 = TCC CONTROL
D17 = BATTERY +
C1 = BATTERY +
D3 = INJECTOR DRIVER
D9 = INJECTOR DRIVER
B10 = IGNITION FEED
D4 = INJECTOR JUMPER
D8 = INJECTOR JUMPER
D19 = GROUND
D13 = REFERENCE
C3 = BYPASS
C9 = EST

ECM Wiring Diagram (3 of 3):

D7 = FUEL PUMP RELAY DRIVE (12V)
B12 = A/C LOW PRESSURE SIGNAL
C13 = A/C RELAY CONTROL
D21 = NOT USED
B20 = #2 FAN REQUEST (DUAL FANS ONLY)
C17 = A/C REQUEST
A9 = #1 FAN CONTROL
A3 = #2 FAN CONTROL (IF USED)