Faulty Signal. Permanent Fault
Faulty signal. Permanent fault
Checking connectors
- Ignition off
- Check the seat heater module connectors B and C for contact resistance and oxidation. Remedy if necessary.
Check for damage carefully
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Wait for the three minutes so the climate control module (CCM) can carry out the diagnostic
- Read off diagnostic trouble codes (DTCs).
The fault was caused by loose connections in the connectors if the status of the diagnostic trouble code (DTC) has changed to intermittent.
Other information:
- To remove the control module, see Comfort module Removal and Replacement
- To access and replace the seat heater module, see Seat heater module, replacing Front Seat, Driver's Seat, Front Seat
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Has the status of the diagnostic trouble code (DTC) changed to intermittent?
Yes - FAULT FOUND
No - Checking the cable and component
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - FAULT FOUND
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Attempt New Test - Checking connectors
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Checking the cable and component
Check the seat heater pads and wiring between connector B terminal #1 and #4 and connector C terminal #1 and #2. Check for an open-circuit. Check for a short-circuit to ground.
Check the thermistor in the seat cushion and the wiring between connector B terminals #2 and #3. Check for an open-circuit. Check for short-circuit to supply voltage.
Check that the power supply to the seat heater module is OK between connector A terminals #1 (ground) and #4 (battery voltage).
The ignition must be on during this check.
Try a new seat heater module if the components, wiring and power supply is OK.
Remedy as necessary.
Other information:
- To access and replace the seat heater pad, see Heater pad backrest, replacing Heater Pad Backrest, Replacing and Heater pad seat cushion Heater Pad Seat Cushion
- To access and replace the seat heater module, see Seat heater module, replacing Front Seat, Driver's Seat, Front Seat
- For the resistance values, see Electrical / electronic system specifications [1][2]Specifications
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Continue - Verification
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Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
- Wait at least three minutes so that the control module has time to carry out its diagnostic
- Read off diagnostic trouble codes (DTCs).
The fault has been remedied if the status of the diagnostic trouble code (DTC) has changed to intermittent.
Has the status of the diagnostic trouble code (DTC) changed to intermittent?
Yes - FAULT FOUND
No - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking connectors
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