Electronic/Powertrain Control Module (ECM/PCM)

PCM Wiring.:

PA2 = PCM GROUND
PA1 = PCM GROUND
PB6 = OXYGEN SENSOR REFERENCE LOW
BD12 = SERIAL DATA LINE
PA12 = OXYGEN SENSOR SIGNAL
PA5 = KEEP ALIVE MEMORY (B+)
PC9 = IAT SIGNAL
PB2 = SENSOR GROUND - IAT, MAP
PD4 = MAP SIGNAL
PA3 = 5 VOLT REFERENCE - MAP, A/C SENSOR
PA4 = TP SENSOR 5 VOLT REFERENCE
PB7 = TP SIGNAL
PB1 = SENSOR GROUND - TP, A/C SENSOR, ECT
PD3 = A/C REFRIGERANT PRESSURE SENSOR SIGNAL
PC10 = ECT SIGNAL
BC13 = KNOCK SENSOR SIGNAL

PCM Wiring:

BD16 = IGNITION FEED
PA8 = FUEL PUMP RELAY CONTROL
PC12 = INJECTOR DRIVER 2 + 3
PC16 = INJECTOR DRIVER 1 + 4
PB11 = TACH SIGNAL
PB3 = IGNITION CONTROL 1
PC15 = IGNITION CONTROL 2
PD2 = 7X REFERENCE HIGH
PD1 = REFERENCE LOW

PCM Wiring.:

PD12 = A/C REQUEST
BC11 = A/C COMPRESSOR CLUTCH CONTROL RELAY
BC9 = COOLING FAN RELAY CONTROL
PB5 = NON A/C PROGRAM (NON A/C VEHICLES)
PC13 = GROUND
PC3 = IAC "A" HI
PC4 = IAC "A" LO
PC6 = IAC "B" HI
PC5 = IAC "B" LO
BC5 = TEMP/CHECK GAGES LAMP CONTROL
BC8 = MAINTENANCE INDICATOR LAMP (MIL) CONTROL
BC1 = EVAP SOLENOID DRIVER

PCM Wiring Schematic:

PD11 = BRAKE SWITCH (4T60E TRANS)
BC2 = SHIFT LITE (MAN) OR TCC APPLY (AUTO)
PD8 = CRUISE CONTROL ENGAGE (AUTO)
BC16 = TCC PWM SOLENOID
BC14 = TRANS SHIFT SOLENOID
BC15 = TRANS SHIFT SOLENOID
BD1 = TRANSMISSION RANGE SWITCH
BD2 = TRANSMISSION RANGE SWITCH
BD3 = TRANSMISSION RANGE SWITCH
BD4 = TRANSMISSION RANGE SWITCH
BD13 = VSS SIGNAL - LOW
BD14 = VSS SIGNAL - HIGH
PB8 = VEHICLE SPEED SIGNAL - OUTPUT