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7. (K602) MFV SIGNAL CIRCUIT VOLTAGE Measure the voltage of the (K602) MFV Signal circuit in the Manifold Flow Valve harness connector. Is the voltage between 4.5 and 5.5 volts? Yes >> Go to 12 No >> Go to 8 8. (K602) MFV SIGNAL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Powertrain Control Module (PCM) connector. Turn the ignition on. Measure the voltage of the (K602) MFV Signal circuit in the Manifold Flow Valve harness connector. Is there any voltage present? Yes >> Repair the (K602) MFV Signal circuit for a short to voltage. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). No >> Go to 9 9. (K602) MFV SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off. Measure the resistance between ground and the (K602) MFV Signal circuit in the Manifold Flow Valve harness Is the resistance above 100 ohms? Yes >> Go to 10 No >> Repair the (K602) MFV Signal circuit for a short to ground. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). 10. (K602) MFV SIGNAL CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT Measure the resistance between the (K602) MFV Signal circuit and the (K900) Sensor Ground circuit in the Manifold Is the resistance above 100 ohms? Yes >> Go to 11 No >> Repair the (K602) MFV Signal circuit for a short to the (K900) Sensor Ground circuit. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). 11. (K602) MFV SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE Measure the resistance of the (K602) MFV Signal circuit between the Manifold Flow Valve harness connector and Is the resistance below 5.0 ohms? Yes >> Go to 16 No >> Repair the (K602) MFV Signal circuit for an open circuit or high resistance. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). PM ENGINE ELECTRICAL DIAGNOSTICS - GPEC 9 - 687 |