How to Disconnect and Remove the Power Steering Pressure Switch from a Toyota Highlander, and How Should It Be Reinstalled?

Disconnect the cable from the negative battery terminal. Raise the front of the vehicle and support it securely on jackstands. For four-cylinder models, note that the Power Steering Pressure Switch is located on the power steering pump and is screwed directly into the pump. Locate the Power Steering Pressure Switch on the power steering pump and disconnect the switch electrical connector. Place a drain pan under the pump, then unscrew the Power Steering Pressure Switch from the pump, anticipating some power steering fluid leakage. Installation is the reverse of removal. Check the power steering fluid level and add fluid as necessary. For V6 models, the Power Steering Pressure Switch is located at the power steering pump, screwed into the top of the banjo bolt connecting the pressure hose to the pump. Disconnect the electrical connector from the Power Steering Pressure Switch. Place a drain pan under the power steering pump, then unscrew the Power Steering Pressure Switch from the banjo bolt, being prepared for power steering fluid leakage. Installation follows the same pattern as removal. Ensure you check and top up the power steering fluid as needed.

Genuine Toyota Highlander Power Steering Pressure Switch

Power Steering Oil Pressure Switch

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Toyota Highlander Power Steering Oil Pressure Switch
Part Number: 89438-33010
$48.18 MSRP: $67.35
You Save: $19.17 (29%)
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Product Specifications
- Other Name: Switch, Power Steering Oil Pressure
- Warranty: This genuine Toyota part is covered by warranty.
Fits the following Vehicles:
- 2001-2007 Toyota Highlander | 4 Cyl 2.4L, 6 Cyl 3.0L, 6 Cyl 3.3L | 1MZFE, 2AZFE, 3MZFE; ACU20L-BRPNKA, ACU20L-BWPNKA, ACU25L-BRPNKA, ACU25L-BWPNKA, MCU20L-BWPNKA, MCU23L-BRANKA, MCU23L-BWANKA, MCU25L-BWPNKA, MCU28L-BRANKA, MCU28L-BWANKA

Toyota Highlander Power Steering Pressure Switch

The Power Steering Pressure Switch of the Toyota Highlander tells the engine computer that an increased load calls for an increase in idle speed so that the engine does not stall. Through the ages, the small sensor sits in the high-pressure line of the hydraulic rack-and-pinion circuit that measures pressure spikes caused by tight parking maneuvers. When the Power Steering Pressure Switch closes, the electronic control module receives a voltage signal to crack the throttle slightly, providing strong steering assistance without stalling the engine. The earlier Highlander models made use of a simple on-off device that switched at a fixed pressure threshold. The later models kept this layout but benefited from Toyota's recent electronics which relayed information much quicker. As such, today's Highlander drivers are able to apply effort naturally without thinking about it. The Power Steering Pressure Switch also works with the pump's flow control valve, which sends extra fluid back to prevent runaway pressure during cruising rpm. Effective communication from the Power Steering Pressure Switch confirms balanced assist at city speeds, firm feedback on highways, and overall confidence expected from every Toyota crossover. The Power Steering Pressure Switch is the quiet hero of everyday steering.

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Toyota Highlander Power Steering Pressure Switch Parts Questions & Experts Answers

Power Steering Oil Pressure Switch
89438-33010
Q: How to Disconnect and Remove the Power Steering Pressure Switch from a Toyota Highlander, and How Should It Be Reinstalled?
A:
Disconnect the cable from the negative battery terminal. Raise the front of the vehicle and support it securely on jackstands. For four-cylinder models, note that the Power Steering Pressure Switch is located on the power steering pump and is screwed directly into the pump. Locate the Power Steering Pressure Switch on the power steering pump and disconnect the switch electrical connector. Place a drain pan under the pump, then unscrew the Power Steering Pressure Switch from the pump, anticipating some power steering fluid leakage. Installation is the reverse of removal. Check the power steering fluid level and add fluid as necessary. For V6 models, the Power Steering Pressure Switch is located at the power steering pump, screwed into the top of the banjo bolt connecting the pressure hose to the pump. Disconnect the electrical connector from the Power Steering Pressure Switch. Place a drain pan under the power steering pump, then unscrew the Power Steering Pressure Switch from the banjo bolt, being prepared for power steering fluid leakage. Installation follows the same pattern as removal. Ensure you check and top up the power steering fluid as needed.