Part 1

Checking the door locking function

Query
Which door does the problem affect?
1. Driver's door
2. Passenger door
3. Left rear door
4. Right rear door.

Select the button that corresponds to the option above.

1 - Driver's door

2 - Passenger door

3 - Left rear door

4 - Right rear door

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Driver's door

Checking the driver's door

Check

Is the lock for the passenger door also not functioning?

Yes - Checking fuses

No - Check

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Checking fuses
Remove fuse 11C/27 from the cargo compartment fusebox.
Check that the fuse is intact. Check for contact resistance and oxidation.

Other information
- To access the integrated relay / fusebox in the cargo compartment, see Relay/fuse box cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- Checking wiring and terminals Checking Wiring And Terminals.

Is the fuse intact?

Yes - Checking for an open-circuit

No - Checking for a short-circuit

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Check
1. The window lift mechanism functions in the relevant door
2. The window lift mechanism does not function in the relevant door.

Select an alternative that corresponds to the above.

1 - Checking the cables for the lock motor

2 - Check

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Check
1. The car is left-hand drive
2. The car is right-hand drive.

Select an alternative that corresponds to the above.

1 - Checking fuses

2 - Checking fuses

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Checking fuses
Remove fuse 11C/35 from the cargo compartment fusebox.
Check that the fuse is intact. Check for contact resistance and oxidation.

Other information
- To access the integrated relay / fusebox in the cargo compartment, see Relay/fuse box cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- Checking wiring and terminals Checking Wiring And Terminals.

Is the fuse intact?

Yes - Checking the voltage

No - Checking for a short-circuit

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Checking fuses
Remove fuse 11C/36 from the cargo compartment fusebox.
Check that the fuse is intact. Check for contact resistance and oxidation.

Other information
- To access the integrated relay / fusebox in the cargo compartment, see Relay/fuse box cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- Checking wiring and terminals Checking Wiring And Terminals.

Is the fuse intact?

Yes - Checking the voltage

No - Checking for a short-circuit

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Checking for an open-circuit
Check terminal #B7 in the connectors for the door control modules. Check for contact resistance and oxidation.
Check the cable between the secondary side of the fuse holder (left) and terminal #B7 in the connectors for the door control modules. Check for an open-circuit.
If a fault is detected, check in particular the intermediate connector in the cable harness (1 connector per control module). Check for contact resistance and oxidation.
If there is an open-circuit, the fault is probably between the fuse and the common junction point 53/427.

Other information
- Checking wiring and terminals Checking Wiring And Terminals.

Continue - Fault Found

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Checking for a short-circuit
Measure the resistance between the fuse holder secondary side (left) and ground.
The ohmmeter should read infinite resistance.

Note! If the value is correct the fault may be intermittent.

Now fault-trace for an intermittent short-circuit to ground.
If the ohmmeter displays a fault (short-circuit), fault-trace the cables between the fuse and terminal #B7 on the connectors for the driver/passenger door module (DDM/PDM). Check for a short-circuit to ground.
The fault is probably between the fuse and the common junction point 53/427.
Replace fuse.

Other information
- Checking wiring and terminals Checking Wiring And Terminals.

Continue - Fault Found

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Checking the voltage
Check the voltage in door control module connector terminal #B12.

Does the voltmeter read battery voltage?

Yes - Checking the cables for the lock motor

No - Checking for an open-circuit

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Checking for an open-circuit
Check door control module connector terminal #B12. Check for contact resistance and oxidation.
Check the cable between the secondary side of the fuse holder (left) and terminal #B12 in the connectors for the door control modules. Check for an open-circuit.
If a fault is detected, check in particular the intermediate connector in the cable harness. Check for contact resistance and oxidation.

Other information
- Checking wiring and terminals Checking Wiring And Terminals.

Continue - Fault Found

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Checking for a short-circuit
Measure the resistance between the fuse holder secondary side (left) and ground.
The ohmmeter should read infinite resistance.

Note! If the value is correct the fault may be intermittent.

Now fault-trace for an intermittent short-circuit to ground.
If the ohmmeter displays a fault (short-circuit), fault-trace the cables between the fuse and terminal #B12 on the connectors for the door control modules. Check for a short-circuit to ground.
Replace fuse.

Other information
- To access the integrated relay / fusebox in the cargo compartment, see Relay/fuse box cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- Checking wiring and terminals Checking Wiring And Terminals.

Continue - Fault Found

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Checking the cables for the lock motor
Check the connectors for the door control module and lock unit. Check for contact resistance and oxidation.
Check the cable between door control module connector terminal #B2 and lock unit connector terminal #8. Check for an open-circuit.
Check the cable between door control module connector terminal #B6 and lock unit connector terminal #7. Check for an open-circuit.

Other information
- To access and replace the rear electronic module (REM), see Relay/fuse box cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- Checking wiring and terminals Checking Wiring And Terminals.

Was a fault detected?

Yes - Fault Found

No - Replacing the component

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Replacing the component
Replace the lock unit. See Lock mechanism front side door, replacing Lock Mechanism Front Side Door, Replacing.

Was a fault detected?

Yes - Fault Found

No - Replacing the component

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Replacing the component
Replace the rear electronic module (REM). See Relay/fuse box cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing.

Continue - Fault Found

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FAULT FOUND - Fault Found

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Passenger door

Checking the passenger door

Check

Is the lock for the driver's door also not functioning?

Yes - Checking fuses

No - Check

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Checking fuses
Remove fuse 11C/27 from the cargo compartment fusebox.
Check that the fuse is intact. Check for contact resistance and oxidation.

Other information
- To access the integrated relay / fusebox in the cargo compartment, see Relay/fuse box cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- Checking wiring and terminals Checking Wiring And Terminals.

Continue - Fault Found

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Checking for a short-circuit
Measure the resistance between the fuse holder secondary side (left) and ground.
The ohmmeter should read infinite resistance.

Note! If the value is correct the fault may be intermittent.

Now fault-trace for an intermittent short-circuit to ground.
If the ohmmeter displays a fault (short-circuit), fault-trace the cables between the fuse and terminal #B7 on the connectors for the door control modules. Check for a short-circuit to ground.
The fault is probably between the fuse and the common junction point 53/427.
Replace fuse.

Other information
- Checking wiring and terminals Checking Wiring And Terminals.

Continue - Fault Found

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Checking the voltage
Check the voltage in door control module connector terminal #B12.

Continue - Fault Found

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Checking for a short-circuit
Measure the resistance between the fuse holder secondary side (left) and ground.
The ohmmeter should read infinite resistance.

Note! If the value is correct the fault may be intermittent.

Now fault-trace for an intermittent short-circuit to ground.
If the ohmmeter displays a fault (short-circuit), fault-trace the cables between the fuse and terminal #B12 on the connectors for the door control modules. Check for a short-circuit to ground.
Replace fuse.

Other information
- To access the integrated relay / fusebox in the cargo compartment, see Relay/fuse box cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- Checking wiring and terminals Checking Wiring And Terminals.

Continue - Fault Found

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