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.
Section 366 (Cruise Control System - Diagnosis): Pre-Check
- DIAGNOSIS SYSTEM
- Description
The ECM stores trouble codes. The diagnosis system allows for reading of the trouble codes from the DLC3. If the CRUISE MAIN indicator light does not come on after DTC check, it means a malfunction has occurred in the cruise control system.
Use the hand-held tester or SST to check and solve the problem.
- Check the DLC3.
The ECM uses ISO 9141-2 for data communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.
- Description
NO RELATED
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.