PCM - ABS MIL ON at High Speeds DTC C0237 Set

File In Section: 06 - Engine/Propulsion System

Bulletin No.: 00-06-04-025A

Date: September, 2000

Subject:
ABS Light On at High Speeds (Above 70mph or 113 km/h), Code C0237 Set (install New PCM)

Models:
2000 Chevrolet and GMC S/T Pickup Models with 2.2 L Engine (VINs 4, 5 - RPOs LN2, L43) and 4L60-E Automatic Transmission (RPO M30)

This bulletin is being revised to add an additional engine and its related information. Please discard Corporate Bulletin Number 00-06-04-025 (Section 06 - Engine).

Condition

Some customers may comment that the ABS light comes on at high speeds (above 70 mph or 113 km/h). Upon investigation, a DTC C0237, Rear Wheel Speed Signal Erratic, will be found.

Cause

Condition may be due to normal fluctuations in the vehicle speed sensor signal that pass from the Powertrain Control Module (PCM) to the Electronic Brake Control Module (EBCM).

Correction

The PCM has been revised to add signal filtering to the speed sensor signal that is passed on to the EBCM. Install a new PCM.

Important:
The VSS Signal Filter is the only change to the PCM. This PCM should not be used in an attempt to repair any condition other than the subject of this bulletin.





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