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• When Monitored: • Set Condition: Possible Causes INTERMITTENT DTC (C818) A/C PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE (C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE (C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (C818) A/C PRESSURE SENSOR (C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE (C918) A/C PRESSURE SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE A/C PRESSURE TRANSDUCER TOTALLY INTEGRATED POWER MODULE (TIPM) Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. DTC IS ACTIVE Ignition on, engine not running. NOTE: Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this Is the status Active for this DTC? Yes >> Go To 2 No >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 2. (C818) A/C PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the A/C Pressure Transducer connector. Disconnect the Totally Integrated Power Module (TIPM) connector. Turn the ignition on. Measure the voltage of the (C818) A/C Pressure Sensor Supply circuit Is there any voltage present? Yes >> Repair the (C818) A/C Pressure Sensor Supply circuit for a short to voltage. Perform the PCM Verification Test Ver. 1 (Refer to 9 - No >> Go to 3 PM ENGINE ELECTRICAL DIAGNOSTICS - GPEC 9 - 467 |