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.
Vent Valve Check
Turn ignition on. Using jumper wire, apply battery voltage to CCU wiring harness connector terminal No. 7. See Figure . Using another jumper wire connected to ground, repeatedly touch terminal No. 12. If vent valve does not click, replace vacuum pump or repair open circuit. If vent valve clicks, check control unit, connector terminals and wiring harness connector. Repair or replace as necessary.
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.