What is the Function and Testing Procedure of the Power Steering Pressure Switch on Acura Integra?

The power steering pressure (PSP) switch, found on US models, is a normally closed switch located in the pressure line near the steering gear. It sends a signal to the PCM when the steering system pressure reaches a high-pressure setpoint, helping to maintain engine idle speed during parking maneuvers. The OBD system can detect issues with the switch and set trouble codes for specific faults. To check the operation of the PSP switch, disconnect its electrical connector and connect an ohmmeter to the terminals. Start the engine and let it idle, ensuring the front wheels are straight; the ohmmeter should show close to zero ohms. As the steering wheel is turned towards the stops, the PSP should open, indicating an open circuit. If the switch fails either test, it should be replaced. To replace the switch, disconnect the cable from the negative battery terminal, ensuring to have the radio's anti-theft code if applicable. If needed, raise the vehicle securely on jackstands, disconnect the electrical connector from the switch, and unscrew it from its fitting. Install and connect the new switch, lower the vehicle if it was raised, and bleed air from the power steering system, adding fluid as necessary.

Genuine Acura Integra Power Steering Pressure Switch

Power Steering Oil Pressure Switch

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3 Power Steering Pressure Switches found

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Acura Integra Switch Assembly, Power Steering Pressure
Part Number: 56490-P2A-003
$78.93 MSRP: $110.73
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Product Specifications
- Replaces: 56490-PT0-023, 56490-PT0-013
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura Integra Switch Assembly, Power Steering Pressure
Part Number: 56490-PR4-013
Product Specifications
- Replaces: 56490-PR4-000, 56490-PR4-003
- Warranty: This genuine part is guaranteed by Acura's factory warranty.
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Acura Integra Switch Assembly, Power Steering Pressure
Part Number: 56490-PR4-003
Product Specifications
- Replaced by: 56490-PR4-013
- Warranty: This genuine part is guaranteed by Acura's factory warranty.

Acura Integra Power Steering Pressure Switch

The hydraulic Power Steering Pressure Switch helps prevent the engine from stumbling or stalling when the hydraulic system is called upon to provide maximum effort. This allows low speed maneuvering to be smooth and reliable. The pressure switch is mounted on the hydraulic line, close to the pump. Whenever you stir the wheel during parking, you create some fluid pressure. When pressure exceeds a set threshold, the Power Steering Pressure Switch signals the engine control computer to increase engine idle speed to ensure the engine is capable of overcoming the added pump load instead of stalling. Acura drivers currently appreciate how invisible this perk feels. The first Acura Integra models utilized a basic on or off style Power Steering Pressure Switch that detected a high pressure level and that is it. Later Acura models working with variable assist steering still applied this simple sensor, but their output was linked to more sophisticated electronic controls that also took into account vehicle speed and steering angle. With these improvements, the Integra Power Steering Pressure Switch is still a low-cost, small sensor but an essential part in preserving a confident steering feel and protecting the engine during every slow speed turn in an Integra. The Power Steering Pressure Switch is crucial for optimal performance.

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Acura Integra Power Steering Pressure Switch Parts Questions & Experts Answers

Switch Assembly, Power Steering Pressure
56490-P2A-003
Q: What is the Function and Testing Procedure of the Power Steering Pressure Switch on Acura Integra?
A:
The power steering pressure (PSP) switch, found on US models, is a normally closed switch located in the pressure line near the steering gear. It sends a signal to the PCM when the steering system pressure reaches a high-pressure setpoint, helping to maintain engine idle speed during parking maneuvers. The OBD system can detect issues with the switch and set trouble codes for specific faults. To check the operation of the PSP switch, disconnect its electrical connector and connect an ohmmeter to the terminals. Start the engine and let it idle, ensuring the front wheels are straight; the ohmmeter should show close to zero ohms. As the steering wheel is turned towards the stops, the PSP should open, indicating an open circuit. If the switch fails either test, it should be replaced. To replace the switch, disconnect the cable from the negative battery terminal, ensuring to have the radio's anti-theft code if applicable. If needed, raise the vehicle securely on jackstands, disconnect the electrical connector from the switch, and unscrew it from its fitting. Install and connect the new switch, lower the vehicle if it was raised, and bleed air from the power steering system, adding fluid as necessary.