Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2007HIGHLANDER 4WD L4-2.4L (2AZ-FE)REPAIR AND DIAGNOSISACCESSORIES AND OPTIONAL EQUIPMENTNAVIGATION SYSTEMTESTING AND INSPECTIONPROGRAMMING AND RELEARNING
2007 Toyota Highlander 4WD L4-2.4L (2AZ-FE)
Programming and Relearning
2007 Toyota Highlander 4WD L4-2.4L (2AZ-FE)SECTION Programming and Relearning
INITIALIZATION
NOTE: Initialize the navigation system (screen noise automatic adjustment) to reduce noise when screen noise occurs upon replacing the multi-display or the navigation ECU.
HINT: Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. SCREEN NOISE AUTOMATIC ADJUSTMENT

a. Turn the ignition switch to the ACC position and wait for at least 6 seconds to activate the diagnostic mode.
b. Select "Navigation Check" from the "Diagnosis MENU" screen.

c. Adjustment is completed when the "Navigation Check" screen appears with a beep.
HINT:
- Make sure that the orange completion mark is displayed on the upper left corner of the screen.
- If automatic adjustment has not been performed after replacing the multi-display, the following condition will occur:
When the ignition switch is turned to the ACC position, a beep sounds for approximately 3 seconds after the initial screen appears.
- A beep does not sound even if automatic adjustment has not been preformed after replacing the navigation ECU.
- If a beep still sounds when the ignition switch is turned to the ACC position after completing automatic adjustment, perform the adjustment again.
d. Cancel the diagnostic mode.
NOTE: Initialize the navigation system (screen noise automatic adjustment) to reduce noise when screen noise occurs upon replacing the multi-display or the navigation ECU.
HINT: Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. SCREEN NOISE AUTOMATIC ADJUSTMENT
a. Turn the ignition switch to the ACC position and wait for at least 6 seconds to activate the diagnostic mode.
b. Select "Navigation Check" from the "Diagnosis MENU" screen.
c. Adjustment is completed when the "Navigation Check" screen appears with a beep.
HINT:
- Make sure that the orange completion mark is displayed on the upper left corner of the screen.
- If automatic adjustment has not been performed after replacing the multi-display, the following condition will occur:
When the ignition switch is turned to the ACC position, a beep sounds for approximately 3 seconds after the initial screen appears.
- A beep does not sound even if automatic adjustment has not been preformed after replacing the navigation ECU.
- If a beep still sounds when the ignition switch is turned to the ACC position after completing automatic adjustment, perform the adjustment again.
d. Cancel the diagnostic mode.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.