Electronic/Powertrain Control Module (ECM/PCM)

ECM Wiring Diagram (1 of 3):

B1 = SERIAL DATA
B15 = DIAGNOSTIC TEST
W12 = ECM GROUND
W13 = ECM GROUND
B23 = OXYGEN SENSOR GROUND
B2 = OXYGEN SENSOR SIGNAL
B6 = VSS INPUT (HIGH)
B13 = VSS INPUT (LOW)
W22 = VSS OUTPUT 4000 PPM
B8 = COOLANT TEMPERATURE SIGNAL
B12 = SENSOR GROUND
B19 = TPS SIGNAL
W11 = 5 VOLT REFERENCE
B20 = MAP SIGNAL
W14 = SENSOR GROUND
B5 = IAT SIGNAL
W7 = IAC COIL "A" HIGH
W17 = IAC COIL "A" LOW
W9 = IAC COIL "B" HIGH
W8 = IAC COIL "B" LOW

ECM Wiring Diagram (2 of 3):

W18 = PARK/NEUTRAL SWITCH
W16 = IGNITION FEED
W1 = FUEL INJECTOR DRIVER
W12 = SYSTEM GROUND
B16 = REFERENCE (LOW)
B9 = REFERENCE (HIGH)
W19 = BYPASS
W6 = EST
W10 = B+
W15 = B+
W24 = FUEL PUMP RELAY DRIVE B+

ECM Wiring Diagram (3 of 3):

B22 = SERVICE ENGINE SOON LIGHT CONTROL
B7 = TCC OR SHIFT LIGHT
W2 = A/C REQUEST
B3 = A/C RELAY CONTROL
B21 = COOLING FAN CONTROL