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• When Monitored: • Set Condition: Possible Causes RELATED ENGINE TPS/APPS DTC’S PRESENT (K23) APP SENSOR 1 SIGNAL CIRCUIT SHORT VOLTAGE (K167) APP SENSOR 1 GROUND CIRCUIT OPEN ACCELERATOR PEDAL POSITION SENSOR TRANSMISSION CONTROL MODULE Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS- Theory of Operation The Accelerator Pedal Position Sensor (APPS) is a linear potentiometer. It provides the ECM and the TCM with a Diagnostic Test 1. CHECK IF RELATED ENGINE TPS/APPS DTC’S ARE PRESENT With the scan tool, check Engine DTC’s. Are there any Engine TPS/APPS DTCs present? Yes >> Refer to the Drivability Category and perform the appropriate Symptom. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMIS- No >> Go To 2 2. CHECK TO SEE IF THE DTC IS CURRENT With the scan tool in Transmission Sensors, read the TPS/APPS voltage. Is the TPS/APPS voltage above 4.94 volts? Yes >> Go To 3 No >> Go To 5 3. ACCELERATOR PEDAL POSITION SENSOR Turn the ignition off to the lock position. Disconnect the APP Sensor harness connector. Ignition on, engine not running. With the scan tool in Transmission Sensors, read the TPS/APPS voltage. Is the TPS/APPS voltage below 0.5 volts? Yes >> Go To 4 No >> Repair the (K23) APP Sensor 1 Signal circuit for a short to voltage. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMIS- 21 - 432 AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS - (DIESEL) KJ |