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• When Monitored: • Set Condition: Possible Causes (K29) APP SENSOR NO.2 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE (K29) APP SENSOR NO.2 SIGNAL SHORTED TO THE (F856) 5-VOLT SUPPLY CIRCUIT (K29) APP SENSOR NO.2 SIGNAL SHORTED TO THE (F855) 5-VOLT SUPPLY CIRCUIT (K400) APP SENSOR NO.2 RETURN CIRCUIT OPEN APP SENSOR PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. APPS NO.2 VOLTAGE ABOVE 3.0 VOLTS Ignition on, engine not running. With a scan tool, read the APP Sensor No.2 voltage. NOTE: Diagnose any 5-Volt Supply DTCs before continuing. Is the voltage above 3.0 volts? Yes >> Go To 2 No >> Go To 8 2. ACCELERATOR PEDAL POSITION SENSOR Turn the ignition off. Disconnect the APP Sensor harness connector Using a jumper wire, connect it from the (K29) APP Sensor Signal circuit and the Sensor ground circuit. Turn the ignition on. With a scan tool, monitor the Accelerator Pedal Position Sensor voltage. Is the voltage at 0 volt? Yes >> Replace the APP Sensor Assembly per Service Information. After installation is complete, use a scan tool and select the ETC RELEARN function to relearn the APPS values. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 3 9 - 792 ENGINE ELECTRICAL DIAGNOSTICS LX |