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LOCATION:    3.5 Models 129, 140, 170   Pneumatic System Equipment (PSE) >   11 Diagnosis - Function Test (Central Locking)


Diagnosis - Function Test (Central Locking)

Preparation for Test:
1. Review 20, 21, 22, 31, 32,
2. RCL system for central locking is functional,
3. Vehicle is unlocked,
4. All doors and trunk lid are closed,
5. Side windows are open,
6. Battery voltage 11 to 14 V,
7. Fuses ok.

Test step/Test scope Test condition Nominal value Possible cause/Remedy 1)
1.0 Locking vehicle by pointing IR transmitter at the RCL receiver (roof frame) (A26/9) or via the IR receivers in the doors (A26/1, A26/2) Locking vehicle using transmitter key. All doors and filler flap lock
in 3 sec.
Model 129:
Interior CL switch locks.
Vehicle does not lock and pump motor in PSE control module (A37) does not run:
PSE version coding incorrect, see 3.5 PSE C/2,
PSE (A37)

Vehicle does not lock, or only partially, even though pump motor in PSE control module (A37) runs:

4.10 12,
32 PSE/CL 2.0,
32 PSE 1.0,
32 PSE 3.0,
32 PSE 5.0,
32 PSE 7.0
2.0 "Selective" unlocking of the vehicle by pointing the IR transmitter at the RCL receiver (roof frame) (A26/9) or via the IR receivers in the doors (A26/1, A26/2) Select "selective" opening.
Unlocking vehicle using transmitter key.
Driver's door and filler flap unlock
in 3 sec.
Model 129:
Interior CL switch unlocks.
Vehicle does not unlock and pump motor in PSE control module (A37) does not run:
Wiring,
PSE version coding incorrect, see 3.5 PSE C/2,
PSE (A37)

Vehicle does not unlock, or only partially, even though pump motor in PSE control module (A37) runs:
23 PSE/CL 1.0,
4.10 12,
32 PSE/CL 2.0,
32 PSE/CL 8.0,
32 PSE 1.0,
32 PSE 5.0,
3.0 "Global" unlocking of the vehicle by pointing the IR transmitter at the RCL receiver (roof frame) (A26/9) or via the IR receivers in the doors (A26/1, A26/2) Select "global" opening.
Unlocking vehicle using transmitter key.
All doors, trunk lid and filler flap lock
in 3 sec.
Model 129:
Interior CL switch unlocks.
Vehicle does not unlock and pump motor in PSE control module (A37) does not run:
Wiring,
PSE version coding incorrect, see 3.5 PSE C/2

Vehicle does not unlock, or only partially, even though pump motor in PSE control module (A37) runs:
23 PSE/CL 1.0,
4.10 12,
32 PSE/CL 2.0,
32 PSE/CL 4.0,
32 PSE/CL 6.0,
32 PSE/CL 8.0,
32 PSE 1.0,
32 PSE 3.0,
32 PSE 5.0,
32 PSE 7.0
4.0 Lock vehicle via interior switch (CL) Unlock vehicle via transmitter key.
Press interior switch in direction: Lock
All doors and trunk lid lock in 3 sec.
Fuel filler flap does not lock.
Vehicle does not lock and pump motor in PSE control module (A37) does not run:
PSE version coding incorrect, see 3.5 PSE C/2,
Wiring,
PSE (A37)

Vehicle does not lock, or only partially, even though pump motor in PSE control module (A37) runs:

23 PSE/CL 1.0,
32 PSE/CL 2.0,
32 PSE/CL 3.0,
32 PSE/CL 1.0,
32 PSE/CL 3.0,
32 PSE/CL 5.0,
32 PSE 2.0,
32 PSE 4.0,
32 PSE 6.0
5.0 Unlock vehicle via interior switch (CL) Press interior switch in direction: Unlock All doors and trunk lid unlock in 3 sec.

Vehicle does not unlock and pump motor in PSE control module (A37) does not run:
PSE version coding incorrect, see 3.5 PSE C/2,
Wiring,
PSE (A37)

Vehicle does not unlock, or only partially, even though pump motor in PSE control module (A37) runs.

23 PSE/CL 1.0,
32 PSE/CL 2.0,
32 PSE/CL 3.0,
23 PSE/CL 1.0,
32 PSE/CL 3.0,
32 PSE/CL 5.0,
32 PSE 2.0,
32 PSE 4.0
32 PSE 6.0
6.0 Unlock vehicle by opening one of the front doors. Select "selective opening".
Vehicle locked via interior switch.
Open one of the front doors via door interior handle.
Door which was unlocked via door interior handle, unlocks. Vehicle unlocks at all doors and the PSE control module (A37) runs:
transmitter key,
PSE (A37)
7.0 Unlock vehicle by opening one of the front doors. Select "global opening".
Vehicle locked via CL interior switch.
Open one of the front doors via door interior handle.
All doors and trunk lid unlock in 3 sec. Vehicle does not unlock and pump motor in PSE control module (A37) does not run:
PSE version coding incorrect, see 3.5 PSE C/2,
Wiring,
PSE (A37).

Vehicle does not unlock, or only partially, even though pump motor in PSE control module (A37) runs:

32 PSE/CL 8.0
32 PSE/CL 9.0
32 PSE/CL 1.0,
32 PSE/CL 3.0,
32 PSE/CL 5.0,
32 PSE 2.0,
32 PSE 4.0,
32 PSE 6.0
8.0 Unlock vehicle via lock switch on front door or trunk lid lock switch
(only ).
Turn mechanical key in lock switch towards unlock. All doors, trunk lid and filler flap unlock
in 3 sec.
Vehicle does not unlock and pump motor in PSE control module (A37) does not run:
Wiring,
PSE (A37).

Vehicle does not unlock, or only partially, even though pump motor in PSE control module (A37) runs:
4.10 23,
32 PSE/CL 1.0,
32 PSE/CL 3.0,
32 PSE/CL 5.0,
32 PSE/CL 7.0,
32 PSE 2.0,
32 PSE 4.0,
32 PSE 6.0,
32 PSE 8.0

9.0 Lock vehicle via lock switch on front door or trunk lid lock switch
(only ).
Turn mechanical key in lock switch towards lock. All doors, trunk lid and filler flap lock
in 3 sec.
Vehicle does not lock and pump motor in PSE control module (A37) does not run:
Wiring,
PSE (A37).

Vehicle does not lock, or only partially, even though pump motor in PSE control module (A37) runs:
4.10 23
32 PSE/CL 2.0,
32 PSE/CL 4.0,
32 PSE/CL 6.0,
32 PSE/CL 8.0,
32 PSE 1.0,
32 PSE 3.0,
32 PSE 6.0
32 PSE 7.0
10.0 Subsequent locking of vehicle via central locking (CL). Remove ignition key.
Lock vehicle via RCL.
Unlock vehicle via RCL.
Do not open any doors within 40 seconds.
Do not press interior switch (CL).
Elapsed time > 40 seconds.
All doors, trunk lid and fuel filler flap lock.
Vehicle does not lock and pump motor in PSE control module (A37) does not run:
PSE version coding incorrect, see 3.5 PSE C/2,
Wiring,
PSE (A37)

Vehicle does not lock, or only partially, even though pump motor in PSE control module (A37) runs:

23 PSE/CL 8.0
,
23 PSE/CL 9.0,
23 PSE/CL 10.0,
23 PSE/CL 11.0,
32 PSE/CL 2.0,
32 PSE/CL 4.0,
32 PSE/CL 6.0,
32 PSE/CL 8.0,
32 PSE 1.0,
32 PSE 3.0,
32 PSE 5.0,
32 PSE 7.0
11.0 Automatic locking of vehicle via central locking (CL). "Automatic locking activated".
Drive vehicle with a speed greater than 9 mph.


The "Automatic locking" feature should not have been deactivated via the CL interior switch (S6s1) or via the HHT.
All doors and trunk lid lock.
Fuel filler flap does not lock.
Vehicle does not lock and pump motor in PSE control module (A37) does not run:
PSE version coding incorrect, see 3.5 PSE C/2,
Wiring,
PSE (A37)

Vehicle does not lock, or only partially, even though pump motor in PSE control module (A37) runs:

32 PSE/CL 12.0,
32 PSE/CL 1.0,
32 PSE/CL 3.0,
32 PSE/CL 5.0,
32 PSE 2.0,
32 PSE 4.0,
32 PSE 6.0
1) Observe Preparation for Test, see 22.