Component Tests and General Diagnostics

1. Measure the #1 PCM terminal voltage and confirm that it is at 0 V or 5 V when the ignition key at ON and the engine at idle.
- If it is at 0 V or 5 V, intermittent concern exists. (See INTERMITTENT CONCERN TROUBLESHOOTING.)
- If not, inspect the following points concerning the PCM connector.
- If there is no problem, inspect for the following.
- Female terminal opening is loose.
- Coupler (pin holder) damage
- Pin discoloration (blackness)
- Harness/pin crimp is loose or disconnected.

2. Measure the #2 sensor terminal voltage and confirm that it is at 0 V or 5 V when the ignition key at ON and the engine at idle.
- If it is at 0 V or 5 V, intermittent concern exists. (See INTERMITTENT CONCERN TROUBLESHOOTING.)
- If not, inspect the following points concerning the sensor connector.
- If there is no problem, inspect for the following.
- Female terminal opening is loose.
- Coupler (pin holder) damage
- Pin discoloration (blackness)
- Harness/pin crimp is loose or disconnected.

3. Confirm that the #3 terminal switch voltage is at 0 V.
- If it is at 0 V, inspect the sensor. If necessary, replace the sensor.
- If necessary, replace the sensor.

- If not, inspect for the following.
- Open circuit in harness
- Female terminal opening is loose.
- Coupler (pin holder) damage
- Pin discoloration (blackness)
- Harness/pin crimp is loose or disconnected.