Power Steering Pressure Switch: Testing and Inspection

NOTE: Perform the following test only when directed.

1. Inspect the following if the power steering is inoperative.
- Power steering fluid level
- Power steering fluid leakage
- Power steering fluid pressure

2. Disconnect the PSP switch connector.
3. Start the engine.

Specification:

4. Inspect for continuity between the PSP switch terminal and GND using an ohmmeter.
- If not as specified, replace the PSP switch.
- If the PSP switch is okay, but PID value or PCM terminal 31 voltage are out of specification, carry out the "Circuit Open/Short Inspection".

Circuit Open/Short Inspection
1. Remove the PCM.




2. Connect the SST (104 Pin Breakout Box) to the PCM as shown.
3. Tighten the connector attaching screw.

Tightening torque :
7.9 - 10.7 N.m {80 - 110 kgf.cm, 69.5 - 95.4 in.lbf}

4. Inspect for an open or short circuit in the following wiring harnesses by probing the applicable sensor and SST (104 Pin Breakout Box) terminals with ohmmeter leads.

Open circuit
- PSP signal circuit (PSP switch connector terminal and PCM connector terminal 31 through common connector)
- GND circuit (PSP switch body and GND)
- If there is an open or short circuit, repair or replace wiring harnesses.
- If there is no open or short circuit, replace the PSP switch.

Short circuit
- PSP signal circuit (PSP switch connector terminal and PCM connector terminal 31 through common connector to GND)

5. Reconnect the PSP switch connector.