Electronic/Powertrain Control Module (ECM/PCM)

ECM Wiring Diagram:

R = ECM MEMORY B+
10 = DISTRIBUTOR REFERENCE
13 = DISTRIBUTOR GROUND
11 = IGN. MODULE BY-PASS
12 = EST
20 = PRESSURE SENSOR
21 = 5 VOLT REFERENCE
22 = SENSOR GROUND
2 = TPS SIGNAL
3 = COOLANT SIGNAL
7 = COOLANT RETURN
9 = 02 HIGH
14 = 02 GROUND
A = ECM GROUND
U = ECM GROUND
H = P/N SWITCH
N = HIGH GEAR SWITCH
L = ELECTRONIC SPARK CONTROL SIGNAL
15 = A/C PRESSURE SWITCH
19 = A/C CUT-OUT RELAY
J = A/C REQUEST
E = IDLE LOAD CONTROL
16 = VEHICLE SPEED SENSOR
6 = REAR VACUUM BREAK
C = IGNITION
B = AIR SWITCH SOLENOID
4 = AIR DIVERT SOLENOID
17 = CANISTER PURGE SOLENOID
18 = M/C SOLENOID
T = EGR SOLENOID
G = SES LAMP DRIVER
P = TCC
S = DIAGNOSTIC LEAD