Faulty Signal. Permanent Fault

Faulty signal. Permanent fault

Checking the live signal




- Ignition on.
Check if a live signal is obtained from the rear right side impact sensor.





Is a live signal obtained?

Yes - Verification

No - Checking the wiring

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Checking the wiring








- Ignition off
- Disconnect the side impact sensor connector
- Disconnect the SRS control module connector.

Hint: There is a connector between the control module and the side impact sensor.

Measure the resistance between the side impact sensor:
- terminal #1 and control module terminal #72 (#47)
- terminal #2 and control module terminal #66 (#41).
for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
The resistance must be approximately 0 ohms. If not there is an open-circuit.
Connect an ohmmeter between control module terminal #72 (#47) and chassis ground. Connect an ohmmeter between side impact sensor terminal #1 and chassis ground. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
The resistance must be infinite.
Connect an ohmmeter between control module terminal #72 (#47) and chassis ground. Connect an ohmmeter between side impact sensor terminal #1 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.
The voltage must be 0 V. If not there is a short-circuit to supply voltage.
Remedy as necessary.

Other information:
- To access and replace the control module see SRS control module Removal and Replacement
- To access and replace the side impact sensor, see SIPS sensor (C-post) SIPS Sensor (C-Post)
- 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).









Was a fault detected?

Yes - Verification

No - Replacing the component

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Replacing the component




- Ignition off.
Try a new side impact sensor according to SIPS sensor (C-post) SIPS Sensor (C-Post).





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 live signal

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