Throttle Position Sensor: Testing and Inspection

THROTTLE POSITION (TP) SENSOR INSPECTION

NOTE:
- The TP sensor on this type of vehicle is maintenance-tree.
- Perform the following test only when directed.

1. Measure the PID value.
- If PID value is not as specified, inspect as follows:
- Verify that the throttle valve is fully closed.
- Accelerator cable free play (See ACCELERATOR CABLE INSPECTION/ADJUSTMENT)
- Throttle cable free play (See ACCELERATOR CABLE INSPECTION/ADJUSTMENT)

- If the above are okay, but PID value is out of specification, perform the "Circuit Open/Short Inspection".

2. Reconnect the TP sensor connector.
- If the above open or short circuit are correct, replace TP sensor.

Circuit Open/Short Inspection

Open circuit
- If there is no continuity, the circuit is open. Repair or replace the harness.
- Reference voltage circuit (TP sensor connector terminal A and PCM connector terminal 4L.)
- TP circuit (TP sensor connector terminal C and PCM connector terminal 4V.)
- GND circuit (TP sensor connector terminal B and PCM connector terminal 4O.)

Short circuit
- If there is continuity, the circuit is shorted. Repair or replace the harness.
- TP sensor connector terminal A and PCM connector terminal 4L to GND.
- TP sensor connector terminal C and PCM connector terminal 4V to GND.