how to fix the cruise control not working in Toyota Highlander Fourth Generation (2020-present)

Toyota Highlander Fourth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

449 words

Problem Statement

Learn how to diagnose and fix cruise control issues in the 2020-present Toyota Highlander. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow time for airbag systems to discharge if working near the steering wheel.

Symptoms

•Cruise control indicator light not illuminated
•Inability to set or maintain speed
•Unintended acceleration or deceleration
•Malfunction indicator light (MIL) illuminated
•Steering wheel controls unresponsive

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored codes related to the cruise control system.
2
Inspect the cruise control switch on the steering wheel for physical damage or wear.
3
Check the brake pedal switch operation; ensure it is functioning properly and not stuck.
4
Verify the vehicle speed sensor (VSS) operation; check for proper voltage and signal output.
5
Inspect the wiring and connectors associated with the cruise control system for corrosion, fraying, or disconnection.
6
Test the cruise control module for functionality, ensuring it receives input signals correctly.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Multimeter
•Screwdriver set
•Torque wrench

Parts Required

•Brake pedal switch
•Cruise control switch
•Vehicle speed sensor (if needed)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored codes related to the cruise control system.
2
Inspect the cruise control switch on the steering wheel for physical damage or wear.
3
Check the brake pedal switch operation; ensure it is functioning properly and not stuck.
4
Verify the vehicle speed sensor (VSS) operation; check for proper voltage and signal output.
5
Inspect the wiring and connectors associated with the cruise control system for corrosion, fraying, or disconnection.
6
Test the cruise control module for functionality, ensuring it receives input signals correctly.

Solution

1. Preparation

Gather tools and parts required.
Disconnect the negative terminal of the battery before beginning work to ensure safety.

2. Inspect and Replace Brake Pedal Switch

Locate the brake pedal switch, typically found above the brake pedal.
Disconnect the electrical connector from the brake pedal switch.
Remove the switch from its mounting bracket (usually involves unscrewing or unclipping).
Install the new brake pedal switch by reversing the removal steps.
Reconnect the electrical connector securely.

3. Check and Replace Cruise Control Switch

Remove the airbag module from the steering wheel (ensure the battery is disconnected).
Unscrew and remove the steering wheel cover to access the cruise control switch.
Disconnect the cruise control switch from its harness.
Install the new cruise control switch and ensure it clicks into place.
Reassemble the steering wheel cover and airbag module.

4. Verify Vehicle Speed Sensor (VSS)

Locate the VSS, usually mounted on the transmission.
Disconnect the VSS electrical connector.
Use a multimeter to test the output voltage; it should meet manufacturer specifications.
If the VSS is faulty, replace it by removing the mounting bolts and installing a new sensor.

5. Reconnect Battery

Reconnect the negative terminal of the battery.
Clear any stored error codes from the OBD-II scanner.

Tools Required:

OBD-II scanner
Socket set
Multimeter
Screwdriver set
Torque wrench (if applicable)

Parts Required:

Brake pedal switch
Cruise control switch
Vehicle speed sensor (if needed)

Estimated Repair Time: 2-4 hours

Safety Warnings:

Disconnect battery before working on electrical systems.
Allow time for airbag systems to discharge if working near the steering wheel.