B2332

AIRBAG, DRIVER





Fault symptoms
Airbag warning lamp on.

Conditions
The following conditions are applicable to the respective diagnostic trouble codes:

B1332
- The resistance measured by the control module is higher than 5.57 ohms for 10 s.
- The resistance measured by the control module is higher than 225 ohms for 160 ms.
- Fault diagnosis will not be carried out if diagnostic trouble code B2332 or B2333 has been generated.

B1333
- The resistance measured by the control module is lower than 2.02 ohms for 20 s.
- Fault diagnosis will not be carried out if diagnostic trouble code B2332 or B2333 has been generated.

B2332
- The voltage applied to control module pin 2 is lower than 1.5 V for 1.25 s.

B2333
- The voltage applied to control module pin 1 is higher than 3.5 V for 1.25 s.

Action

1. Checking the coil spring (contact roller)




- Turn the ignition switch to the OFF position.




- Undo the connector: Control Module Airbag:(331)
- Connect a break-out box (BOB) to the mains.




- Undo the connector: Airbag, Driver: (333D)
- Check that the connection of the coil spring (contact roller) is in good order.




- Connect the reference resistor 86 12 095 to the 2-pin connector




- Undo the connector: Coil spring (contact roller),steering wheel:(336a)
- Check that the coil spring's orange 3-pin connector is in perfect condition.
- Select the trouble code that has been generated

B1332, B1333
- Go to step 2.
B2332, B2333
- Go to step 4.

2. Checking the coil spring (contact roller)
- Connect the coil spring's 3-pin connector.
- Measure resistance on the back of the connector.
- Red feed cable: Coil spring (contact roller), steering wheel:1




- Black feed cable: Coil spring (contact roller), steering wheel:3
- The value should be 2 - 4 ohms

Test results OK?

YES
- Go to step 3.
NO
- Change: Coil spring (contact roller), steering wheel
- Go to step 8.

3. Check the wiring harness between the control module and the airbag.




- Undo the connector: Coil spring (contact roller), steering wheel: (336a)
- Check the wiring's orange 3-pin connector for an open circuit and or pin slide-out and rectify it as necessary.




- Connect the connector. Coil spring (contact roller), steering wheel: (336a)




- Unplug connector: Break-Out Box: (BOB)
- Check pins 1 and 2 of the control module's 45- pin connector for an open circuit and/or pin slide-out and rectify them as necessary.




- Plug in the connector: Break-Out Box : (BOB)
- Take a resistance reading
- Red feed cable: Control module Airbag: 1




- Black feed cable: Control module Airbag: 2
- The value should be 3 - 5 ohms

Test results OK?

YES
- Change: Airbag, driver
- Go to step 8.
NO
- Repair or replace the wiring.
- Go to step 8.

4. Checking the coil spring (contact roller)
- Take a resistance reading




- Red feed cable: Coil spring (contact roller), steering wheel:1




- Black test lead: Car battery: B-.
- Try to touch off the fault by turning the steering wheel.
- The resistance should be infinite (O.L.).

Test results OK?

YES
- Go to step 5.
NO
- Change: Coil spring (contact roller), steering wheel
- Go to step 8.

5. Checking the coil spring (contact roller)
- Take a resistance reading




- Red feed cable: Coil spring (contact roller), steering wheel: 3




- Black test lead: Car battery: B-.
- Try to touch off the fault by turning the steering wheel.
- The resistance should be infinite (O.L.).

Test results OK?

YES
- Go to step 6.
NO
- Go to step 8.

6. Check the wiring harness between the control module and airbag




- Undo the connector: Coil spring (contact roller), steering wheel: (336a)
- Check the wiring's orange 3-pin connector for an open circuit and or pin slide-out and rectify it as necessary.




- Connect the connector. Coil spring (contact roller), steering wheel: (336a)




- Unplug connector: Break-Out Box: (BOB)
- Check pins 1 and 2 of the control module's 45- pin connector for an open circuit and/or pin slide-out and rectify them as necessary.





- Plug in the connector: Break-Out Box: (BOB)
- Take a resistance reading




- Red feed cable: Control module Airbag: 1




- Black test lead: Car battery: B-.
- The resistance should be infinite (O.L.).

Test results OK?

YES
- Go to step 7.
NO
- Repair or replace the wiring.
- Go to step 8.

7. Check the wiring harness between the control module and the airbag
- Take a resistance reading




- Red feed cable: Control module Airbag: 2




- Black test lead: Car battery: B-.
- The resistance should be infinite (O.L.).

Test results OK?

YES
- Change: Airbag, driver
- Go to step 8.
NO
- Repair or replace the wiring.
- Go to step 8.

8. Final check




- Clear the diagnostic trouble codes in all systems.
- Perform a driving cycle:
- Drive the car with varying engine loads and at varying engine speeds for five minutes.
- Evaluate the driving cycle:




- Check that the diagnostic trouble code has not recurred.

Test results OK?

YES
- The steps taken to rectify the fault were correct.
NO
- See before changing a control module.