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 (Refer to POWER STEERING FLUID INSPECTION.):
- Power steering fluid level
- Power steering fluid leakage
- Power steering fluid pressure

2. Disconnect the PSP switch connector.
3. Start the engine.
4. Inspect for continuity between the PSP switch terminal and Ground by using an ohmmeter.




Specification

- 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, inspect as follows.
(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 Nm (80 - 110 kg.cm, 69.5 - 95.4 in.lb)

(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)
- Ground circuit (PSP switch body and Ground)
- 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 Ground)

5. Reconnect the PSP switch connector.