Faulty Signal

Faulty signal

Checking the sensor




- Ignition on.

Checking components and connectors
Check the connectors. Check for contact resistance. Check for oxidation. Check for loose connections.
Check the sensor in the seat. Take readings between:
- terminals #2 and #3 on connector B for the seat heating module (SHM). Check for an open-circuit
- terminal #2 on connector B and chassis ground. Check for a short-circuit to ground
- terminal #2 on connector B and terminal #4 on connector A. Check for a short-circuit to supply voltage.
Remedy as necessary.

Other information:
- For further information about the connectors, fuses and relays, see the Wiring Diagram
- Connecting the breakout box Connecting the Breakout Box, Climate Control Module (CCM)
- Signal description Signal Description, Climate Control Module (CCM)
- Component location Component Location, Climate Control Module (CCM)
- Seat Heating Module (SHM) Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals

Continue - Verification

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Activate the seat heating. Check that the seat heats up.

Is the seat heater functioning?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information

Attempt New Test - Checking the sensor

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