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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) >> Diagnosis

DTC C0239: TCS Spark Retard Monitoring Malfunction (CAMARO & Firebird): Diagnosis

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.
  1. Perform DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. Go to next step.
  2. Turn ignition off. Disconnect EBCM connector. Install Universal Pinout Box (J 39700) using Cable Adapter (J 39700-25) to EBCM harness connector only. Turn ignition on, engine off. Using DVOM, measure voltage between universal pinout box terminal No. 19 (Gray/Black wire) and ground. If voltage is greater than 10 volts, go to next step. If voltage is not greater than 10 volts, go to step  6 .
  3. Turn ignition off. Disconnect PCM connector C2. Turn ignition on, engine off. Using DVOM, measure voltage between universal pinout box terminal No. 19 (Gray/Black wire) and ground. If voltage is greater than one volt, go to next step. If voltage is less than one volt, go to step  5 .
  4. Repair short to voltage in Gray/Black wire between PCM and EBCM. After repairs, go to step  11 .
  5. Replace EBCM. See ELECTRONIC BRAKE CONTROL MODULE  under REMOVAL & INSTALLATION. After repairs, go to step  11 .
  6. Turn ignition off. Disconnect PCM connector C2. Using DVOM, measure resistance between universal pinout box terminals No. 15 (Black wire) and No. 19 (Gray/Black wire). If resistance is infinite, go to step  8 . If resistance is not infinite, go to next step.
  7. Repair short to ground in Gray/White wire between PCM and EBCM. After repairs, go to step  11 .
  8. Using DVOM, measure resistance between universal pinout box terminal No. 19 (Gray/Black wire) and PCM connector C2 terminal No. 53. If resistance is 0-5 ohms, go to step  10 . If resistance is not 0-5 ohms, go to next step.
  9. Repair open in Gray/White wire between PCM and EBCM. After repairs, go to step  11 .
  10. Diagnose PCM. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. After repairs, go to next step.
  11. Using scan tool, clear DTCs. Operate vehicle. If DTC does not reset, system is okay.
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