Contents: Examination ⇊ Replacement ⇊
Examination
1. The PSP switch is included in the hydraulic line of the power steering system in the section between the steering pump and the rack and pinion housing. When the steering wheel is turned sharply (for example, when parking or making sharp turns), the pressure in the power steering system increases significantly and the PSP switch closes, informing the PCM module about this, which accordingly increases the idle speed, compensating for the increasing load on the engine. If the switch malfunctions, the OBD self-diagnostic system enters the corresponding fault code into the processor memory.
2. If the engine stalls when making maneuvers while parking the car, check the proper functioning of the PSP switch sensor. A faulty switch sensor can also lead to the engine constantly exceeding idle speed.
3. Identification of the PSP sensor-switch connector terminals can be made using the electrical connection diagrams.
4. Disconnect the electrical wiring from the sensor switch and connect the ohmmeter to the terminals on the sensor body.
5. Start the engine at idle speed.
6. Bring the front wheels of the car into a straight-ahead position and read the ohmmeter reading, which in this case should be equal to infinity.
7. Rotate the steering wheel in any direction and observe the meter readings. When the steering wheel approaches any of the extreme positions, the PSP switch sensor should close, which is confirmed by a zero reading on the ohmmeter.
8. If the test results are negative, replace the switch sensor. If the switch sensor is OK, check the engine idle speed settings.
Replacement
1. Jack up the car and place it on supports.
2. Disconnect the negative cable from the battery.
Caution! The negative cable should always be disconnected first and reconnected last. If the car stereo system is equipped with a security code, make sure you have the correct combination to activate the system before disconnecting the battery!
3. Disconnect the electrical wiring from the sensor-switch and unscrew the latter from its nipple connection.
4. Install a replacement sensor-switch in place of the faulty one and lower the car to the ground.
5. Remove air locks from the hydraulic circuit of the power steering system (see Chapter Suspension and steering). If necessary, adjust the hydraulic fluid level (see Chapter Settings and ongoing maintenance).
[Based on materials from the website: www.HondaBook.ru]