Intermittent Simulation

To reproduce the conditions creating an intermittent fault, use the following methods:

• Lightly vibrate component.
• Heat component.
• Wiggle or bend wiring harness.
• Spray component with water.
• Remove/apply vacuum source.

Monitor circuit/component voltage or resistance while simulating intermittent. Use test results to identify a faulty component or circuit.

On California vehicles, intermittent simulation may cause the CHECK ENGINE light to flash if an intermittent condition is reproduced on the following circuits.

• Code 12: Airflow meter circuit
• Code 13: Coolant (engine) temperature sensor circuit
• Code 14: Vehicle speed sensor circuit
• Code 33: Exhaust gas sensor circuit
• Code 35: Exhaust gas temperature sensor circuit
• Code 43: Throttle position sensor circuit
• Code 51: Injector circuit