Accelerator Pedal Position Sensor: Testing and Inspection

ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [MZI-3.7]

NOTE:
- Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. Description and Operation

Voltage Inspection

1. Turn the ignition switch to the ON position (Engine OFF).

2. Verify that the PCM terminal 1AC, 1AG and 1AK change smoothly while throttle valve is gradually opened.

- If as verified, go to next step.
- If not as verified, perform the "Circuit Open/Short Inspection".

- If there is no open or short circuit, replace the throttle body.

3. Verify that the PCM terminal 1AC, 1AG and 1AK voltages are as shown in the following table.






- If voltage is not as following table, perform the "Circuit Open/Short Inspection".

- If there is no open or short circuit, replace accelerator pedal. Service and Repair
APP sensor output voltage





Circuit Open/Short Inspection





1. Disconnect the PCM connector. Service and Repair

2. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Open circuit

- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

- APP sensor terminal B and PCM terminal 1AC
- APP sensor terminal C and PCM terminal 1AH
- APP sensor terminal D and PCM terminal 1Y
- APP sensor terminal E and PCM terminal 1AK
- APP sensor terminal F and PCM terminal 1BA
- APP sensor terminal G and PCM terminal 1AD

Short circuit

- If there is continuity, there is a short circuit. Repair or replace the wiring harness.

- APP sensor terminal B and body ground
- APP sensor terminal B and power supply
- APP sensor terminal C and power supply
- APP sensor terminal D and body ground
- APP sensor terminal E and body ground
- APP sensor terminal E and power supply
- APP sensor terminal F and body ground
- APP sensor terminal G and power supply