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.
Principles of Operation
The compass is self-calibrating. This eliminates the need to manually set the compass. If the compass is displaying a heading and not displaying C or CAL, the compass is in auto-calibration mode. In this mode, the compass automatically calibrates for changes in vehicle magnetics over the life of the vehicle. This auto-calibration mode assures the compass heading is always accurate.
A display of C or CAL indicates the compass requires calibration. The compass may temporarily display C or CAL if the vehicle characteristics have changed (carwash, collision, etc.). Compass adjustment is controlled by the COMP switch which provides access to the calibration and zone adjustment procedures.
Excessive magnetism in or near the vehicle may cause the compass to display ALL SEGMENTS. In order to distinguish between vehicle magnetics and surrounding magnetics, drive the vehicle to an area that is free from large metal objects. Cycling the ignition switch ON and OFF will reset the compass. A display of ALL SEGMENTS within 20 seconds indicates excessive vehicle magnetism and the vehicle should be demagnetized. For additional information, refer to VEHICLE DEMAGNETIZING .
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.