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Home >> Chevrolet >> 2001 >> Impala Base, 3.8 K >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Anti-Lock Brake System With Traction Control System - BOSCH 5.3) >> Diagnostic Tests >> DTC C0239: TCS Spark Retard Monitoring Malfunction (CAMARO & Firebird) >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2001 Pontiac Grand Prix, 2001 Pontiac Firebird, 2001 Oldsmobile Intrigue, and 2001 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Spark Retard is simultaneously controlled by EBCM and PCM. PCM supplies a 12-volt pull-up voltage. This voltage is monitored by PCM, EBCM requests spark retard by pulling voltage low.

DTC sets when EBCM senses short to ground, short to battery voltage or open in Gray/White wire between PCM and EBCM.

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