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Home › Mercedes Benz › 2001 › ML430 › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Tests › DTC P0341: Camshaft Hall-Effect Sensor (B6/1) › Testing Procedure

Testing Procedure

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.
  1. 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 SIGNAL PATTERN IDENTIFICATION  .
  2. Increase engine speed. When engine speed is increased, voltage should increase. If voltage signal is not okay or voltage does not increase with increase in engine speed, possible cause wiring harness failure or camshaft hall-effect sensor (B6/1) defective. Repair as necessary.
  3. 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.
  4. Camshaft Hall-Effect Sensor Voltage Supply -  Disconnect camshaft hall-effect sensor. Turn ignition on. Connect DVOM between camshaft hall-effect sensor (B6/1) 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.
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