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Home >> Jeep >> 1989 >> Wagoneer >> Repair and Diagnosis >> Engine Performance >> System >> 4.0L MPFI CEC Testing >> Ecu Connector Pin I.D.

Ecu Connector Pin I.D.

Fig 1: 4.0L MPFI Diagnostic Connector D1 & D2
G113143Courtesy of CHRYSLER MOTORS.
Fig 2: ECU Connector Pin Locations
G113144Courtesy of CHRYSLER MOTORS.
ECU 24-PIN MPFI CONNECTOR PIN IDENTIFICATION

Terminal No. Wire Function
A1 Injector No. 3
A2 Injector No. 6
A3 Injector No. 2
A4 Injector No. 4
A5 Fuel Pump Relay
A6 Not Used
A7 Oxygen Sensor Relay
A8 Shift Light
A9 Latch Relay
A10 EGR/Evap. Solenoid
A11 Not Used
A12 A/C Relay
B1 Injector No. 1
B2 Injector No. 5
B3 AIS A
B4 AIS A1
B5 AIS C
B6 AIS C1
B7 Battery (+ Pos.)
B8 Ignition
B9 Not Used
B10 Latched B (+ Pos.)
B11 Ground
B12 Ground
ECU 32-PIN MPFI CONNECTOR PIN IDENTIFICATION

Terminal No. Wire Function
C1 Speed Sensor (+ Pos.)
C2 A/C Request
C3 Start
C4 P/N Switch
C5 Sync. (- Neg.)
C6 MAP Sensor
C7 TPS Sensor
C8 Air Temp. Sensor
C9 Not Used
C10 Coolant Temp. Sensor
C11 Injection Supply
C12 TX Serial Data
C13 Not Used
C14 MAP Sensor Supply Voltage
C15 TPS Supply Voltage
C16 Sync. (+ Pos.)
D1 Speed Sensor (- Neg.)
D2 A/C Select
D3 Sensor Ground
D4 Not Used
D5 Not Used
D6 Not Used
D7 Not Used
D8 Knock Sensor Ground
D9 Oxygen Sensor Input
D10 Injector Supply
D11 RX Serial Data
D12 Not Used
D13 Spark/Dwell
D14 Not Used
D15 Not Used
D16 Knock Sensor