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.
Acc Control Module Calibration
Automatic ACC control module calibration occurs when ignition has been turned on after ACC control module replacement or when power supply has been interrupted within 10 minutes of ignition being turned off. Calibration is required when a stepping motor has been replaced or position has been changed.
To manually recalibrate ACC control module, start engine and allow to idle. Simultaneously press AUTO and OFF buttons. See Figure. ACC display panel will flash one time, indicating that calibration and self-diagnostic test has started. During calibration "0" will be displayed or any Diagnostic Trouble Codes (DTCs) that have been detected. Calibration and self-diagnostic test should be completed in about 30 seconds.
Up to 6 DTCs can be stored at any time. The number stored will be indicated by up to 6 fan motor speed bars. All stored DTCs are cleared at the start and while calibration and self-diagnostic test are in progress. The number of faults found will be shown on the ACC control module display.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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