B2338
Diagnostic trouble code B2333/Diagnostic trouble code B2338 - Driver airbag/Passenger airbag, short to the positive battery terminal.�0:
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.
NOTE: If no fault can be demonstrated during measuring, change the contact roller. The contact roller is the most common cause of intermittent faults.
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 8471 153 to the connector.
On Cars With Passenger Airbag:
a. Remove the glove compartment and unplug the connector on the underside of the passenger airbag.
b. Plug in 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 7.
If the diagnostic trouble code does not return:
The fault is in the steering wheel airbag or in the passenger airbag (if fitted). Conduct an extra test as described in point 5.
5. Switch off the ignition and remove the negative battery lead. Remove the reference resistor from the steering wheel airbag connector and plug in.the steering wheel airbag.
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, remove the negative battery lead and change the steering wheel airbag.
Then proceed to point 11.
If the diagnostic trouble code does not return: If the car is equipped with a passenger airbag, conduct an extra test as described in point 6.
If the car has no passenger airbag, switch off the ignition and remove the negative battery lead. Unplug the connector from the steering wheel airbag.
Refit the negative battery lead and then proceed to point 7.
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6. Switch off the ignition and remove the negative battery lead. Refit the reference the steering wheel airbag connector.
Remove the reference resistor from the passenger airbag connector and plug in the passenger airbag.
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, remove the negative battery lead and change the passenger airbag. Then proceed to point 11.
If the diagn6stic trouble code does not return: Switch off the ignition and remove the negative battery lead. Unplug the connector from the passenger airbag and refit the reference resistor.
Refit the negative battery lead and then proceed to point 7.
7. Switch off the ignition and remove the reference resistor from the steering wheel airbag connector.
Remove the connector from the SRS control module and connect a BOB to the cable assembly.
Switch on the ignition and connect a voltmeter between contact 10 on the BOB and a safe grounding point. Then connect the voltmeter between contact 11 and a safe grounding point.
In both cases, the voltmeter should show 0 V.
If the value is OK: If the car is equipped with a passenger airbag, proceed to point 10.
If the car is not equipped with a passenger airbag. Proceed to point 11.
If the value is incorrect: Proceed to point 8.
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8. Switch off the ignition and unplug connector H2-52. Switch on the ignition.
Connect a voltmeter between contact 10 on the BOB and a safe grounding point. Then connect a voltmeter between contact 11 on the BOB and a safe grounding point. The voltmeter should show 0 V.
If the value is OK: Proceed to point 9.
If the value is incorrect: If any of the measurements shows voltage, there is a bypass to the battery positive voltage on the lead in question between the SRS connector and connector H2-52. Investigate the cause and change the cable assembly. Then proceed to point 11.
9. Connect a voltmeter between pin 1 in connector H2-52 from the contact roller and a safe grounding point. Then connect the voltmeter between pin 3 in the connector and a safe grounding point.
The voltmeter should show 0 V. If the value is OK:
If the car is equipped with a passenger airbag, proceed to point 10.
If the car is not equipped with a passenger airbag. Proceed to point 11.
If the value is incorrect: If any of the measurements shows voltage, the fault is in the contact roller. Change the contact roller and then proceed to point 11.
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10. Switch off the ignition and remove the reference resistor from the passenger airbag connector. Switch on the ignition.
Connect a voltmeter between contact 13 on the BOB and a safe grounding point. Then connect the voltmeter between contact 14 on the BOB and a safe grounding point. In both cases, the voltmeter should show 0 V.
If the value is OK: Proceed to point 11.
If the value is incorrect: If any of the measurements shows voltage, there is a bypass to battery positive voltage on the lead in question. Investigate the cause and change the cable assembly. Then proceed to point 11.
11. Switch off the ignition and remove the negative battery lead.
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 with the ignition on. Check to see 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.