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.
CMTC Internal Failure
Monitored & Set Condition
- When Monitored: When a SELF TEST command is received from the scan tool, the CMTC performs a series of tests on the microprocessor, compass coil and internal circuitry.
- Set Condition: The code will be set, if during the self test the CMTC detects a problem with the microprocessor, compass coil or the internal circuitry.
Possible Causes:
- CMTC/EVIC Internal Failure
Testing
- When the trouble code FAILED SELF TEST is displayed, replace the CMTC or EVIC. See OVERHEAD CONSOLES - CONCORDE, INTREPID & 300M article. If the vehicle is equipped with a Tire Pressure Monitor (TPM), the EVIC must be retrained.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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