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12. (K900) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE Measure the resistance of the (K900) Sensor Ground circuit between the Manifold Flow Valve harness connector Is the resistance below 5.0 ohms? Yes >> Go to 13 No >> Repair the (K900) Sensor Ground circuit for an open circuit or high resistance. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). 13. (K602) MFV SIGNAL CIRCUIT SHORTED TO THE (K857) 5 VOLT SUPPLY CIRCUIT Measure the resistance between the (K602) MFV Signal circuit and the (K857) 5 Volt Supply in the Manifold Flow Is the resistance below 100 ohms? Yes >> Repair the (K602) MFV Signal circuit for a short to the (K857) 5 Volt Supply circuit. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). No >> Go to 14 14. (Z916) GROUND CIRCUIT OPEN OR HIGH RESISTANCE Using a 12 volt test light connected to 12 volts, check the (Z916) Ground circuit in the Manifold Flow Valve harness NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connec- Is the test light illuminated and bright? Yes >> Go to 15 No >> Repair the (Z916) Ground circuit for an open circuit or high resistance. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). 15. MANIFOLD FLOW VALVE Turn the ignition off. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Manifold Flow Valve Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Refer to any Technical Service Bulletins that may apply. Remove the Manifold Flow Valve. Inspect the return spring and the valve blade assembly for debris stuck in the path or for frozen/seized blades. NOTE: Manifold Flow Valve over travel or under travel can cause this DTC to set. NOTE: If the Manifold Flow Valve blades are seized in the intake manifold, the manifold will have to be NOTE: If the Manifold Flow Valve is replaced, a non volatile memory reset must be performed to learn the Were any problems found? Yes >> Repair as necessary. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). No >> Replace the Manifold Flow Valve in accordance with the Service Information. Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). PM ENGINE ELECTRICAL DIAGNOSTICS - GPEC 9 - 683 |