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.
Idle Speed Control
Idle speed is controlled by the ECU through the idle speed stepper motor. A latch relay is used to program the stepper motor for engine start-up. The relay is located on the right inner fender panel. See Figure . The ECU energizes the latch relay when engine is in cranking mode, and keeps the relay energized for 3-5 seconds after the engine is stopped. In this way, the stepper motor can provide the proper increased enrichment for the next engine start. Idle speed is nonadjustable.
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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.