Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking component












- Make a note of anti-theft radio code.
- Ignition off.
- Disconnect battery negative lead.
- Disconnect connector from seat belt tensioner.

Warning! Under no circumstances use ohmmeter or other live measuring instrument to take readings on a disconnected non-deployed pyrotechnical seat belt tensioner. This could deploy the seat belt tensioner!

- Install special tool 998 8695 TEST DEVICE 998 8695 Test Device on the seat belt tensioner connector.

Caution! The special tool should be checked and faultless. If the tool is defective it will cause errors in the diagnosis and make fault-tracing harder.

- Ignition on.
- Connect battery negative lead.
- Read DTCs.
If the fault is in the seat belt tensioner the DTC status should now have switched to intermittent fault. Try replacing the seat belt tensioner and carrying out a new verification afterwards.

Other information:
- To access/replace the seat belt tensioner, see Service and Repair.





Does the diagnostic trouble code (DTC) status change?

Yes - Verification

No - Checking component and wiring

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Checking component and wiring












- Ignition off.
- Disconnect battery negative lead.
- Remove special tool 998 8695 TEST DEVICE 998 8695 Test Device.
Connect an ohmmeter between seat belt tensioner #1 and ground, measure for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.

Other information:
- To access/replace the control module, see Service and Repair.









Continue - Verification

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Verification




Verification

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




- Ignition off
- Disconnect the battery negative lead
- Reinstall the connectors, components etc.
- Ignition on
- Connect the battery negative lead.

Warning! There must not be anyone inside the passenger compartment when the battery is connected.

- Read off diagnostic trouble codes (DTCs).
The fault is no longer present if the status of the diagnostic trouble code (DTC) has changed to intermittent.





Does the status change?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - 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 component

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