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This document provides the pinout details for the Ignition Control Module (ICM) used in 1988-1994 and similar GM vehicles equipped with the 3.1L V6 engine and Distributorless Ignition System (DIS). Depending on the specific engine and ignition configuration, this information applies to GM vehicles produced between 1987 and the mid-1990s.
- Pontiac Grand Prix (1988-1994)
- Chevrolet Lumina (1990-1994)
- Oldsmobile Cutlass Supreme (1988-1994)
- Buick Regal (1988-1994)
Please verify the specific configuration of your vehicle before proceeding with any repairs.
ICM Pinout Details
Pin | Description | Wire Color |
A | Crankshaft Position Sensor (CKP) - Positive | Yellow |
B | Crankshaft Position Sensor (CKP) - Negative | Purple |
C | Ground | Black |
D | Ignition Coil 1 Control | White |
E | Ignition Coil 2 Control | Green |
F | Ignition Coil 3 Control | Pink |
G | Battery Voltage (+12V) | Pink/Black |
H | Tachometer Output | White/Black |
I | Electronic Spark Timing (EST) from ECM | White/Red |
J | Bypass Signal (Bypass Mode) | Tan/Black |
Compatibility
This pinout applies primarily to GM vehicles equipped with the 3.1L V6 engine and DIS ignition systems produced between 1987 and the mid-1990s. Compatible models include:- Pontiac Grand Prix (1988-1994)
- Chevrolet Lumina (1990-1994)
- Oldsmobile Cutlass Supreme (1988-1994)
- Buick Regal (1988-1994)
Please verify the specific configuration of your vehicle before proceeding with any repairs.