Signal Too High. Permanent Fault

Signal too high. Permanent fault

Checking the connector








- Ignition off
- Disconnect the battery negative lead
- Disconnect the SRS control module and combined instrument panel connector B.
- Ignition on
- Connect the battery negative lead.

Warning! There must not be anyone inside the passenger compartment.

Check the control module and combined instrument panel connector B. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.













Other information:
- To access and replace the control module see SRS control module Removal and Replacement
- To access and replace the combined instrument panel, see Driver information module (DIM), installation/removal, component replacement Removal and Replacement
- For information about signals, see Signal specification Signal Description. Supplementary Restraint System (SRS).

Continue - Checking the cable

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Checking the cable








- The SRS control module and combined instrument panel disconnected.
- Ignition on.
Connect an ohmmeter between control module terminal #54 (#29) and chassis ground. Check for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Hint: The voltage must be approximately 0 V.

There is a short-circuit to supply voltage if the voltage is greater than 0 V.
The fault is in the combined instrument panel if there is no short-circuit to supply voltage.
Connect an ohmmeter between control module terminal #54 (#29) and the battery positive terminal.
The resistance must be approximately 1.5 kohms.
Remedy as necessary.

Other information:
- To access and replace the control module, see SRS control module Removal and Replacement
- To access and replace the combined instrument panel, see Driver information module (DIM), installation/removal, component replacement Removal and Replacement
- To connect the breakout box, see Connecting the breakout box Connecting The Breakout Box
- For information about signals, see Signal specification Signal Description. Supplementary Restraint System (SRS).









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 the connector

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