Diagnostic Manual, Body and Accessories,
Volume 1.1
Diagnosis - Function Test (PSE)
Preparation for Test:
1. Fuses for PSE system and PSE control module ok,
2. Battery voltage 11 - 14 V,
3. Unlock vehicle via remote central locking,
4. Ignition: ON
5. Connect the Hand-Held Tester (HHT) to X11/4, according to diagram, see
section 0.
Readout DTC memory and note failure codes.
Perform repairs of noted failures as per fault table.
Interrupt PSE control module power supply for approx. 3 seconds to erase
safety memory.
Since the DTC memory has been integrated into the combination control module
(N10-1 or N10-3), DTC memory must be erased after replacement of the PSE
control module.
|
![](../../../../volumes/ba1.1/3_3/PSE/12_1.gif) |
DTC
![](../../../../logos/mb/mbhht.gif) |
Possible
cause |
Test step/Remedy
1) |
![](../../../../logos/mb/ubdg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/zerdg.gif) ![](../../../../logos/mb/twodg.gif) ![](../../../../logos/mb/uidg.gif) |
CAN data line, no communication
with PSE control module (A37). |
23 1.0 - 8.0,
Combination control
module (N10-1 or N10-3),
PSE control module (A37).
|
![](../../../../logos/mb/ubdg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/zerdg.gif) ![](../../../../logos/mb/twodg.gif) ![](../../../../logos/mb/foudg.gif) |
CAN data line, LOW or combination
control module (N10-1 or N10-3). |
23 2.0,
4.0, 6.0,
8.0,
Combination control
module (N10-1 or N10-3).
|
![](../../../../logos/mb/ubdg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/zerdg.gif) ![](../../../../logos/mb/twodg.gif) ![](../../../../logos/mb/fivdg.gif) |
CAN data line, High or combination
control module (N10-1 or N10-3). |
23 3.0,
5.0, 7.0,
8.0,
Combination control
module (N10-1 or N10-3).
|
![](../../../../logos/mb/ubdg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/zerdg.gif) ![](../../../../logos/mb/zerdg.gif) |
Lock switch circuit SN1/SN2
from RCL control module (N54) to combination control module (N10-1
or N10-3) ![](../../../../logos/other/lceil.gif) -
or ![](../../../../logos/other/lceil.gif) +. |
4.5
23
19.0 - 20.0
4.7
23 25.0 - 26.0 |
![](../../../../logos/mb/ubdg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/sixdg.gif) |
RHR unlocking switch (S6/1s3),
signal > 25 sec. |
23 (PSE/RHR)
1.0
|
![](../../../../logos/mb/ubdg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/sevdg.gif) |
Interior switch (CL) (S6/1s2),
signal > 25 sec. |
23 (PSE/CL)
1.0
|
![](../../../../logos/mb/ubdg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/twodg.gif) ![](../../../../logos/mb/foudg.gif) |
Remote trunk release switch
(S15), signal > 25 sec., ![](../../../../logos/other/lceil.gif) -. |
23 (PSE/RTR)
1.0
|
![](../../../../logos/mb/ubdg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/foudg.gif) ![](../../../../logos/mb/thrdg.gif) ![](../../../../logos/mb/sixdg.gif) |
Central locking - faulty
function due to error signal from other consumers or CL pneumatic
system leak. |
32 PSE/CL 1.0
- 8.0
|
![](../../../../logos/mb/ubdg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/foudg.gif) ![](../../../../logos/mb/thrdg.gif) ![](../../../../logos/mb/sevdg.gif) |
Retractable head restraint
pneumatic system leak. |
32 (PSE/RHR)
1.0 - 3.0
|
![](../../../../logos/mb/ubdg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/foudg.gif) ![](../../../../logos/mb/thrdg.gif) ![](../../../../logos/mb/eigdg.gif) |
Multi-contour seat, air pressure
or safety time. |
32 (PSE/OSB)
1.0 - 4.0
|
![](../../../../logos/mb/ubdg.gif) ![](../../../../logos/mb/uidg.gif) ![](../../../../logos/mb/foudg.gif) ![](../../../../logos/mb/thrdg.gif) ![](../../../../logos/mb/nindg.gif) |
Manifold vacuum assist, Time
> max. |
32 (PSE/MVA)
1.0
|
1) Observe Preparation
for Test, see 22. |
|