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Volume 1.1

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LOCATION:    3.5 Models 129, 140, 170   Pneumatic System Equipment (PSE) >   12 Diagnosis - Diagnostic Trouble Code (DTC) Memory (PSE)


Diagnosis - Diagnostic Trouble Code (DTC) Memory (PSE)

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.