Note On INTERMITTENTS

Failures can be difficult to diagnose accurately. If an intermittent condition is diagnosed, ABS self-diagnostic system can be used to help find suspect circuit:

• Display and record code history data. Clear any Anti-Lock Brake System/Traction Control System (ABS/TCS) trouble codes present in Electronic Brake Traction Control Module (EBTCM).
• Test drive vehicle. Attempt to repeat failure under condition in which failure occurred.
• After duplicating condition, stop vehicle, and display any ABS trouble codes which may have been stored.
• If no trouble codes were stored, use SYMPTOM DIAGNOSTIC CHARTS if necessary.

Most intermittent problems are caused by faulty electrical connectors or wiring. When an intermittent failure is encountered, check suspect circuits for:

• Poor mating of connector halves or terminals not fully seated in connector body (backed out).
• Improperly formed or damaged terminals. All connector terminals in a problem circuit should be carefully reformed to increase contact tension.
• Poor terminal-to-wire connection. This requires removing terminal from connector body to inspect.
• Wheel speed sensor cables not attached in retainers or routed too close to spark plug wires.
• Low system voltage. If low system voltage is detected at EBTCM, ABS will turn on ANTI-LOCK light until normal system voltage is achieved.