B1337
Diagnostic trouble code B1337 - Passenger airbag, interruption���:
1. Connect the ISAT Note the diagnostic trouble code and the type of fault. P=permanent fault, I=intermittent fault.
If the fault is permanent: Proceed to point 3.
If the fault is intermittent: Proceed to point 2.
2. The fault is intermittent. Try to provoke the fault at each measuring stage during fault diagnosis.
Manipulate connectors and leads and turn the steering wheel while taking measurements.
Proceed to point 3.
3. Switch off the ignition and disconnect the negative battery lead. Undo the bolts securing the steering wheel airbag. Unplug the connector on the rear of the airbag and connect reference resistor 84 71 153 to the connector.
Remove the glove compartment and unplug the connector on the underside of the passenger airbag. Connect reference resistor 84 71 153 to the connector.
Proceed to point 4.
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4. Refit the negative battery lead and switch on the ignition. Erase the diagnostic trouble code. Switch off the ignition and switch it back on again. Wait for at least 10 seconds with the ignition on.
Check to see if the diagnostic trouble code returns.
If the diagnostic trouble code returns: Proceed to point 6.
If the diagnostic trouble code does not return:
The fault is in the airbag. Conduct an extra test as described in point 5.
5. Switch off the ignition and remove the negative lead from the battery. Remove the reference resistor from the passenger airbag connector and plug in the passenger airbag to the connector.
Refit the negative battery lead and switch on the ignition. Wait for at least 10 seconds with the ignition on.
Check to see if the diagnostic trouble code returns.
If the diagnostic trouble code returns: Switch off the ignition and remove the negative battery lead. Change the passenger airbag. Then proceed to point 8.
If the diagnostic trouble code does not return: Switch off the ignition and remove the negative battery lead. Unplug the connector from the airbag and refit the reference resistor. Refit the negative battery lead and then proceed to point 6.
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6. Switch off the ignition. Free the SRS control module. Unplug the connector from the SRS control module and check sleeves 13 and 14 for breaks/bad connections. Refit the connector to the SRS control module and switch on the ignition.
Erase the diagnostic trouble code. Switch off the ignition and switch it back on again. wait for at least 10 seconds with the ignition on. Check to see if the diagnostic trouble code returns.
If the diagnostic trouble code returns: Proceed to point 7.
If the diagnostic trouble code does not return: The fault was in the SRS connector. Proceed to point 8.
NOTE: If no fault was detected in the connector, the fault may be intermittent. Try to provoke any intermittent fault and see if the SRS lamp lights.
7. Switch off the ignition Unplug the connector from the SRS control module and connect a BOB. Connect an ohmmeter between contacts 13 and 14 on the BOB.
The ohmmeter should show 2-3 ohms.
If the value is OK: Proceed to point 8.
If the value is incorrect: If the ohmmeter shows a high resistance, there is a break in the cable assembly between the SRS control module and the passenger airbag. Investigate the cause and change the cable assembly. Then proceed to point 8.
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8. Switch off the ignition and remove the negative lead from the battery.
Remove the reference resistors and plug in all connectors to their original components. Refit the negative battery lead and switch on the ignition.
Erase the diagnostic trouble code. Switch off the ignition and switch it back on again. Wait for at least 10 seconds.
Check if the diagnostic trouble code returns.
If the diagnostic trouble code returns: Description of On-Board Diagnostics
If the diagnostic trouble code does not return: Return the car to good order.