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.
Central Electronic Module (CEM) (2000-2004): Lighting: Wash/wipe
If rear window washing is used for shorter time than 350 ms, a wiper stroke (impulse function) is performed, which cancels the interval function.
For rear window wiper, the wiper performs three strokes after washing. The windshield wipers perform two strokes, followed by an extra stroke.
Washer functions front and rear are not synchronized.
The rear window washer is activated when reversing if the windshield wiper is engaged and reverse gear is selected. The rear window wiper does not have to be activated.
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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