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P2122-ACCELERATOR PEDAL POSITION SENSOR 1 CIRCUIT LOW (CONTINUED) For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS). For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes (F855) 5-VOLT SUPPLY CIRCUIT OPEN (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND (K23) APP SENSOR NO.1 SIGNAL CIRCUIT OPEN (K23) APP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO GROUND (K23) APP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO THE (K4) APP SENSOR NO.1 RETURN CIRCUIT (K23) APP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO THE (K400) APP SENSOR NO.2 RETURN CIRCUIT APP SENSOR PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. APP SENSOR BELOW 0.25 OF A VOLT Ignition on, engine not running. With a scan tool, read the APP Sensor No.1 voltage. Is the voltage below 0.25 of a volt? Yes >> Go To 2 No >> Go To 11 2. (F855) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the APP Sensor harness connector. Ignition on, engine not running. Measure the voltage on the (F855) 5-volt Supply circuit in the APP Is the voltage between 4.5 and 5.2 volts? Yes >> Go To 3 No >> Go To 8 HB ENGINE ELECTRICAL DIAGNOSTICS 9 - 875 |