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.
Cruise Control System: Functions
The cruise control has the following functions:
- Constant Speed Control
- Set
- Coast
- Accel
- Resume
- Low Speed Limit Control
- High Speed Limit Control
- Automatic Transmission Control
- Manual Cancel
- Auto Cancel
- Tap-Down Control
- Tap-Up Control
- Diagnosis
- Fail Safe
If the ECM detects a malfunction in the cruise control system, the ECU stores the malfunction data in memory, in addition to illuminating the cruise indicator light. Then, the DTCs can be accessed by connecting a hand-held tester to the DLC3 terminal or the Diagnosis Check Wire No. 2 (SST 09843-18040) to the Tc and CG terminals of the DLC3 and reading the blinking of the cruise indicator light. See SELF-DIAGNOSTIC SYSTEM .
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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.