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Robert

W-BodyTech

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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.

ICM Pinout Details​

PinDescriptionWire Color
ACrankshaft Position Sensor (CKP) - PositiveYellow
BCrankshaft Position Sensor (CKP) - NegativePurple
CGroundBlack
DIgnition Coil 1 ControlWhite
EIgnition Coil 2 ControlGreen
FIgnition Coil 3 ControlPink
GBattery Voltage (+12V)Pink/Black
HTachometer OutputWhite/Black
IElectronic Spark Timing (EST) from ECMWhite/Red
JBypass 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.
 
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