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.
Test 55A - Diagnosing Compass/Temperature Module Problems
Compass/temperature module diagnostics are separated into various categories. Verify customer complaint and identify problem area before performing appropriate test. Perform tests in order indicated. See DIAGNOSING COMPASS/TEMPERATURE PROBLEMS table.
| Description | Perform Test |
|---|---|
| Module Shows Trouble Codes | Replace Module |
| COMP/TEMP & US/M Buttons | Replace Module |
| Blank Display | 55B |
| VFD Segment | 55C |
| Display Illumination | 55D |
| Compass Direction Reading | 55E |
| Ambient Temperature Reading | 56A |
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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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