1992 Plymouth Laser Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Electronic Control Unit 18-Pin Connector

ECU 18-PIN CONNECTOR PIN IDENTIFICATION (1)

Terminal Wire Color Function
51 Yellow/Dark Blue Injector No. 1 Control
52 Yellow/Black Injector No. 2 Control
53 Brown/White EGR Solenoid Control (Calif.)
54 Yellow Power Transistor Control
55 Yellow/Red Power Transistor Control
56 White/Red MPI Control Relay Fuel Control
57 White Fuel Pressure Control Solenoid
58 Dark Blue Idle Speed Control
59 Yellow Idle Speed Control
60 Light Green Injector No. 3 Control
61 Light Green/White Injector No. 4 Control
62 Black/White Purge Solenoid Control
63 Black/Dark Blue MPI Control Relay Power Control
64 Red/Dark Green CHECK ENGINE Light
65 Red/Black A/C Clutch Relay Control
66 Black/Dark Blue MPI Control Relay Power Control
67 White Idle Speed Control
68 Black Idle Speed Control
(1) See Fig 1 for connector identification.
Fig 1: Electronic Control Unit 18-Pin Connector Terminal ID
G92B06253Courtesy of CHRYSLER MOTORS.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.