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.
2002 Mercedes Benz S430FACTORY OEM SERVICE PROCEDURE
Camshaft Hall Sensor (B6/1)
NOTE:
Manufacturer recommends checking camshaft hall-effect sensor signal using an oscilloscope. If an oscilloscope is not available, testing can be performed with a DVOM.
- Camshaft Hall-Effect Sensor Signal (Testing With Oscilloscope) - Connect oscilloscope between ME-SFI control module connector "E" terminals No. 39 and 40 (socket box terminals No. 95 and 96). Observe oscilloscope with engine idling. See Fig 1 .
- If oscilloscope pattern is okay, go to step 4 . If oscilloscope pattern is not okay, possible cause wiring harness failure or camshaft hall-effect sensor (B6/1) defective. Repair as necessary.
- Camshaft Hall-Effect Sensor Signal (Testing With DVOM) - Connect DVOM between ME-SFI control module connector "E" terminal No. 40 (socket box terminal No. 96) and ME-SFI control module connector "A" terminal No. 2 (socket box terminal No. 2). Observe DVOM with engine idling. Voltage should be 1.2-2.2 volts. Voltage will vary slightly. If voltage is not okay, possible causes are wiring harness failure or camshaft hall-effect sensor (B6/1) defective. Repair as necessary.
- Camshaft Hall-Effect Sensor (Voltage Supply) - Disconnect camshaft hall-effect sensor (B6/1) connector. Turn ignition on. Connect DVOM between camshaft hall-effect sensor (B6/1) connector (harness side) terminals No. 1 (Brown/Green wire) and 3 (Red/Blue wire). Voltage should be 11-14 volts. If voltage is within specification, test is complete. If voltage is not within specification, possible cause is wiring harness failure. Repair as necessary.
Factory Service Tools
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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.