Diagnostic Manual, Body and Accessories,
Volume 2
Diagnosis - Diagnostic Trouble Code (DTC) Memory
Preliminary work:
Function test 11
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Preparation for Test (DTC readout):
1. Fuses OK.
2. Battery voltage >11 V.
3. Unlock vehicle.
4. Ignition ON.
5. Connect Hand-Held Tester (HHT) according to connection diagram shown
in section 0.
Note:
The diagnostic trouble codes (DTC's) can only be read out and erased using
the Hand-Held Tester (HHT).
Note regarding Diagnostic Trouble Codes (DTC's):
Current diagnostic trouble codes are highlighted in black on the display.
Additional detailed fault information based on fault type is displayed with
nearly all diagnostic codes (DTC's) such as:
> Resistance too great
< Resistance too low
![](../../../logos/other/lceil.gif) -
Short circuit to ground (GND)
![](../../../logos/other/lceil.gif) +
Short circuit to positive (POS)
-//- Open circuit
Additionally, further diagnostic info. such as fault frequency is displayed
with some of the diagnostic trouble codes.
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![](../../../volumes/ba2/4_7/12_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/zerdg.gif) ![](../../../logos/mb/zerdg.gif) |
IR DAS control module (N54/1) |
Replace N54/1 |
![](../../../logos/mb/ubdg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/zerdg.gif) ![](../../../logos/mb/zerdg.gif) |
Control line deactivation, ![](../../../logos/other/lceil.gif) +
or ![](../../../logos/other/lceil.gif) -,
(SN1) |
23 17.0, 18.0,
21.0, 22.0 |
![](../../../logos/mb/ubdg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/zerdg.gif) ![](../../../logos/mb/uidg.gif) |
Control line activation, ![](../../../logos/other/lceil.gif) +
or ![](../../../logos/other/lceil.gif) -,
(SN2) |
23 19.0 - 22.0 |
![](../../../logos/mb/ubdg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/zerdg.gif) ![](../../../logos/mb/thrdg.gif) |
Red indicator lamp, ![](../../../logos/other/lceil.gif) +
or ![](../../../logos/other/lceil.gif) - |
23 5.0 |
![](../../../logos/mb/ubdg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/zerdg.gif) ![](../../../logos/mb/foudg.gif) |
Green indicator lamp, ![](../../../logos/other/lceil.gif) +
or ![](../../../logos/other/lceil.gif) - |
23 6.0 |
![](../../../logos/mb/ubdg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/sevdg.gif) ![](../../../logos/mb/zerdg.gif) ![](../../../logos/mb/uidg.gif) |
Incorrect authorization code, motor
electronics (CAN) |
11 7.0 |
![](../../../logos/mb/ubdg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/sevdg.gif) ![](../../../logos/mb/zerdg.gif) ![](../../../logos/mb/twodg.gif) |
Incorrect authorization code, engine
control module, left cylinder bank, (CAN) |
11 7.0 |
![](../../../logos/mb/ubdg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/sevdg.gif) ![](../../../logos/mb/zerdg.gif) ![](../../../logos/mb/thrdg.gif) |
Attempt was made to start vehicle
with invalid transponder identification code |
IR transmitter key fault - replace
key.
Erase DTC's. |
![](../../../logos/mb/ubdg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/sevdg.gif) ![](../../../logos/mb/zerdg.gif) ![](../../../logos/mb/foudg.gif) |
Coil for transponder (coil will not
saturate) |
23 23.0, 24.0 |
![](../../../logos/mb/ubdg.gif) ![](../../../logos/mb/uidg.gif) ![](../../../logos/mb/sevdg.gif) ![](../../../logos/mb/zerdg.gif) ![](../../../logos/mb/fivdg.gif) |
Activationof locking confirmation
relay module [K54), turn signal system,
![](../../../logos/other/lceil.gif) +
or ![](../../../logos/other/lceil.gif) - |
23 9.0, 10.0 |
1) Observe Preparation
for Test, see 22. |
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