Preparation for Test:
1. Unlock vehicle via remote central locking,
2. Battery voltage 11 - 14 V,
3. Fuses ok,
4. Review C/1, 
20,
21,
22,
31,
32,,
5. Connect the Hand-Held Tester (HHT) to X11/4, according to diagram, see
section 0. Readout and note DTCS's.
The DTC memory can only be readout and erased via the HHT.
DTC's can be readout only for models 129 and 140.
Voltage supply to control modules and CAN data lines ok.
Readout DTC memory and note failure codes.
Perform repairs of noted failures as per fault table. There is a separate
fault table for each model in this section.
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.
>  resistance too great
< resistance too low
  +
short circuit to positive (POS)
-
short circuit to ground (GND)
-//- open circuit
Actual values for Model 140 and 170 only, see
11
The tests and activations within the Function Test Section (
11) can be performed using the HHT.
Within 12, the DTC's are arranged
by model, please see header as necessary. |
 |
Model 129 only
DTC
 |
Possible
cause |
Hints |
Test step/Remedy
1) |
   |
Central locking, driver's
door - safety switch time exceeded. |
|
32 PSE  1.0,
32 PSE 2.0,
32 PSE/CL 1.0,
32 PSE/CL
2.0
|
 |
Central locking, fuel filler
flap - safety switch time exceeded. |
|
32 PSE 7.0,
32 PSE 8.0,
32 PSE/CL 5.0,
32 PSE/CL 6.0
|
 |
Central locking, passenger
door - safety switch time exceeded. |
|
32 PSE 3.0,
32 PSE 4.0,
32 PSE/CL 3.0,
32 PSE/CL 4.0
|
| 1) Observe Preparation
for Test, see 22. |
Model 140 only
DTC
|
Possible
cause |
Hints |
Test step/Remedy
1) |
|
Central locking: air demand
too high |
|
32 PSE/CL 1.0,
32 PSE/CL
2.0,
32 PSE/CL 3.0,
32 PSE/CL 4.0,
32 PSE/CL 5.0,
32 PSE/CL 6.0,
32 PSE/CL 7.0,
32 PSE/CL 8.0 |
|
Retractable trunk lid grip:
air demand too high |
D.M.,
B&A, Vol. 1.1, section 3.1,
32 |
|
|
RHR/RTR : air demand too
high |
|
See AD80.20-P-8003-01A,
AD80.20-P-8002-01A |
 |
Multi-contour seat backrest
(OSB): air demand too high |
|
See AD80.20-P-8004-01A,
AD80.20-P-8004-01B |
 |
MVA: vacuum too low |
|
See AD80.20-P-8005-01A |
 |
Lock switch circuit 1 (S86/1,
S87/1, S88/1):
Resistance too high |
|
4.10
23
4.10
23 |
 |
Lock switch circuit 2 (S86/1,
S87/1, S88/1):
Resistance too high |
|
4.10
23
4.10
23 |
 |
RHR release switch (S52):
Resistance too high |
|
See AD80.20-P-6003-01A |
|
Interior CL switch (S85):
Resistance too high |
|
23 PSE/CL 1.0
|
|
Left front door switch (S17/3,
S17/4):
Resistance too high |
|
23 PSE 3.0 |
|
Remote trunk release switch
(S15):
Resistance too high |
|
See AD80.20-P-6002-01A
|
|
Rotary tumbler/trunk lid
microswitch (S88/1):
Resistance too high |
|
See AD80.20-P-6002-02A |
|
Lock switch circuit 1 (S86/1,
S87/1, S88/1):
Signal > 2 minutes |
|
4.10
23
4.10
23 |
|
Lock switch circuit 2 (S86/1,
S87/1, S88/1):
Signal > 2 minutes |
|
4.10
23
4.10
23 |
|
Interior CL switch (S85):
Signal > 2 minutes |
|
23 PSE/CL 2.0 |
|
RHR release switch (S52):
Signal > 2 minutes |
|
See AD80.20-P-6003-01A |
|
RTR release switch (S15):
Signal > 2 minutes |
|
See AD80.20-P-6002-01A |
| 1) Observe Preparation
for Test, see 22. |
Model 170 only
DTC
|
Possible
cause |
Hints |
Test step/Remedy
1) |
|
Central locking, driver's
door - safety switch time exceeded. |
|
32 PSE 1.0,
32 PSE 2.0,
32 PSE/CL 1.0,
32 PSE/CL
2.0 |
|
Central locking, fuel filler
flap - safety switch time exceeded. |
|
32 PSE 7.0,
32 PSE 8.0,
32 PSE/CL 5.0,
32 PSE/CL 6.0 |
|
Central locking, passenger
door - safety switch time exceeded. |
|
32 PSE 3.0,
32 PSE 4.0,
32 PSE/CL 3.0,
32 PSE/CL 4.0 |
 |
Combination control module
(N10-3) |
|
Replace combination control
module. |
|
Low voltage |
|
|
|
System voltage too high |
|
|
|
CAN: no commumnication with
PSE control module |
|
23 PSE 9.0,
23 PSE 10.0,
23 PSE 11.0,
23 PSE 12.0,
23 PSE 13.0,
23 PSE 14.0,
23 PSE 15.0 |
|
CAN: Data line-Low |
|
23 PSE 9.0,
23 PSE 10.0,
23 PSE 11.0,
23 PSE 12.0,
23 PSE 13.0,
23 PSE 14.0,
23 PSE 15.0 |
|
CAN: Data line-High |
|
23 PSE 9.0,
23 PSE 10.0,
23 PSE 11.0,
23 PSE 12.0,
23 PSE 13.0,
23 PSE 14.0,
23 PSE 15.0 |
|
Control line SN1/SN2 from
N54/3 to N10-3,
-
short circuit to ground (GND)
+
short circuit to positive (POS) |
|
4.10
23,
4.10
23,
4.10
23,
4.10
23, |
|
Central locking, driver's
door - safety switch time exceeded. |
|
32 PSE 1.0,
32 PSE 2.0,
32 PSE/CL 1.0,
32 PSE/CL
2.0 |
|
Central locking, fuel filler
flap - safety switch time exceeded. |
|
32 PSE 7.0,
32 PSE 8.0,
32 PSE/CL 5.0,
32 PSE/CL 6.0 |
|
Central locking, passenger
door - safety switch time exceeded. |
|
32 PSE 3.0,
32 PSE 4.0,
32 PSE/CL 3.0,
32 PSE/CL 4.0 |
|
PSE control module,
combined functions, (A37) |
|
Replace PSE (A37). |
| 1) Observe Preparation
for Test, see 22. |
|
Printable
version
