Traction Control (TCS)

TCS DTC 31: Engine Retard Command (PFINH) signal

NOTE: If the MIL or ABS indicator is ON, troubleshoot the PGM-FI or ABS first.

1. Disconnect the PCM connector E (12P: '99 model, 20P: '00-03 models) and ABS/TCS control unit connector B(16P).








2. Check for continuity between the PCM connector E terminal No. 3 ('99 model) or No. 7 ('00-03 models) and body ground.
Is there continuity?
YES-Repair short to body ground in the wire between the PCM and the ABS/TCS control unit.
NO-Go to step 3.
3. Connect PCM connector E (12P).
4. Start the engine.











5. Measure the voltage between the PCM connector E terminal No. 3 ('99 model) or No. 7 ('00-03 models) and body ground.

NOTE: Use the 10 V range or similar range in an analog tester.

Is there about 2.5 V?
YES-Go to step 6.
NO-Check for loose PCM connectors. If necessary, substitute a known-good PCM, and recheck.








6. With an analog voltmeter set to the 10 V or similar range, measure the voltage between the ABS/TCS control unit connector B (16P) terminal No. 10 and body ground.
Is there about 2.5 V?
YES-Check for loose ABS/TCS control unit connectors. If necessary, substitute a known-good ABS/TCS control unit, and rechecked
NO-Repair open in the wire between the PCM and the ABS/TCS control unit.