Central locking not working
- Make
- Alfa Romeo
- Model
- Brera and Spider Factory Service Manual
- Year
- 2005–2010
- Section
- Doors › Central locking not working
CENTRAL LOCKING NOT WORKING
When the central locking is operated via the driver''s door using the mechanical key and/or from the inside, via the locking/unlocking buttons, the central locking system does not work.
The door locking/unlocking command reaches the Body Computer Node via the CAN. The body computer node sends the signal received to the rear door and boot locks.
| 0 | PRELIMINARY CHECK | All OK | Problems encountered | Operation |
|---|---|---|---|---|
| - Check that the door locking/unlocking system is working properly using the interior buttons | Move on to Step 4 | System not working using the buttons | Move on to Step 1 | |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
Keeping the Examiner diagnostic equipment connected, check: - no control units inactive; - no faulty control units; - no control units with faulty CAN line; | Move on to Step 2 | Presence of faults | Continue following the instructions for the diagnostic equipment. | |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Using the Examiner diagnostic equipment, check that the learning of the change of status of the door locking/unlocking switch is correct by turning the key in the lock barrel | Move on to Step 3 | The door lock change of status has not been learnt. | Move on to Step 3 | |
| 3 | ELECTRICAL CIRCUIT CHECK | All OK | Problems encountered | Operation |
- Check the continuity/insulation of the electrical connection between the door node and the body computer - Check the condition of the door lock protective fuse | Move on to Step 4 | Electrical connection broken or not insulated. | Restore the electrical connection | |
| Door lock protective fuse blown | Replace the fuse after having identified the cause | |||
| 4 | ELECTRICAL CHECKS | All OK | Problems encountered | Operation |
| Check that the door node is correctly supplied with power. Check the body computer is correctly supplied with power. | End of diagnosis. | Door node not correctly supplied with power. | Restore the correct power supply to the door node | |
| Body Computer power supply defective. | Restore the correct power supply to the body computer | |||
| Body Computer defective | Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R only after ensuring that none of the parts indicated above is defective. |
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