Checking the Unlocking from the Deadlock Position BLL
Checking the unlocking from the deadlock position BLL
Selecting the door
Note! Trouble-shooting indicates that locking/unlocking using central locking is working normally.
Which door has the problem?
1. Front door
2. Rear door
Choose the correct option from above.
1 - Checking the front door
2 - Checking the rear door
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Checking the front door
Check the control unit connector B1 and lock unit connector 6 for contact resistance and oxidation as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and check the intermediate wire for an open circuit as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Is there a fault?
Yes - FAULT FOUND
No - Checking the components
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Checking the rear door
Which door has the problem?
1. One rear door
2. Both rear doors
Choose the correct option from above.
1 - Circuit test
2 - Circuit test
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Circuit test
The fault is caused by an open circuit in the wire from (or in) the lock unit. To find out which circuit contains the fault:
Remove the relay for locking to the deadlock position (2/115).
Remove lock unit connector and check for contact resistance and oxidation as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Additional information
- To access the relay/fuse box in the boot, see Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing.
- To access the lock unit, see Replacing the switch for the lock unit / cargo compartment lighting Replacing the Switch for the Lock Unit / Cargo Compartment Lighting.
Is there a fault?
Yes - FAULT FOUND
No - continued
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Circuit test, continued
Check the wire between 8 in the cable connector and 3 in the relay socket for an open circuit as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. If a fault is detected, check in particular the intermediate connector in the cable harness (2) for contact resistance and oxidation as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Additional information
- To access the relay/fuse box in the boot, see Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing.
- To access the lock unit, see Replacing the switch for the lock unit / cargo compartment lighting Replacing the Switch for the Lock Unit / Cargo Compartment Lighting.
Is there a fault?
Yes - FAULT FOUND
No - Checking the components
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Circuit test
Start by replacing the relay 2/115 for locking to the deadlock position in the boot relay/fuse box. At the same time check relay socket contacts for contact resistance and oxidation as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Additional information
- To access the relay/fuse box in the boot, see Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing.
Is there a fault?
Yes - FAULT FOUND
No - continued
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Circuit test, continued
- Remove relay 2/115.
Measure resistance between 4 in the relay socket and ground. The ohmmeter will indicate a short circuit.
Additional information
- To access the relay/fuse box in the boot, see Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing.
Does the ohmmeter display a short circuit?
Yes - FAULT FOUND
No - Replacing the component
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Replacing the component
Replace control unit as described in Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing.
Continue - FAULT FOUND
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Checking the components
Check the resistance between pin 8 and 6 in the lock unit chassis contact.
The ohmmeter should display approximately 5 ohm.
Additional information
- To remove the lock unit, see Replacing the switch for the lock unit / cargo compartment lighting Replacing the Switch for the Lock Unit / Cargo Compartment Lighting.
- For information on signals, see Signal specification Signal Specification.
Is the value correct?
Yes - Function test
No - Replacing the component
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Function test
Check that the lock unit mechanical/electrical function is ok before re-installing the lock unit.
Is function OK?
Yes - FAULT FOUND
No - Replacing the component
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Replacing the component
Replace lock unit as described in Replacing the switch for the lock unit / cargo compartment lighting Replacing the Switch for the Lock Unit / Cargo Compartment Lighting.
Continue - FAULT FOUND
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Checking the components
Check the resistance between pin 7 and 6 in the lock unit chassis contact.
The ohmmeter should display approximately 5 ohm.
Additional information
- To remove the lock unit, see Replacing the switch for the lock unit / cargo compartment lighting Replacing the Switch for the Lock Unit / Cargo Compartment Lighting.
- For information on signals, see Signal specification Signal Specification.
Is the value correct?
Yes - Function test
No - FAULT FOUND
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Function test
Check that the lock unit mechanical/electrical function is ok before re-installing the lock unit.
Is function OK?
Yes - Replacing the component
No - Replacing the component
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Replacing the component
Replace control unit as described in Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing.
Continue - FAULT FOUND
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Replacing the component
Replace lock unit as described in Replacing the switch for the lock unit / cargo compartment lighting Replacing the Switch for the Lock Unit / Cargo Compartment Lighting.
Continue - FAULT FOUND
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