ESP, BAS, PRE-SAFE - Fault message in instrument cluster
Topic number

LI54.18-P-062956

Version

6

Function group

54.18 Cable harnesses

Date

01-25-2019

Validity

Model 205 and 253

Reason for change

Repair method and validity revised

Reason for block

Complaint:

ESP®, BAS, PRE-SAFE®, HOLD function, Hill-Start Assist and ESP® trailer stabilization may be unavailable, and the
adaptive brake lights, Adaptive Brake Assist and/or ATTENTION ASSIST may be deactivated. The brake system continues to operate with normal effectiveness. The support functions listed will be available again after an ignition off/on
cycle.
One or more of the faults listed under 'Control unit/fault code' for the accelerator pedal (B37) is logged in the engine
control unit, or in model 205 as of code 809 in the PTCU control unit (N127). Consequential faults may have been logged in the ESP control unit.

Cause:

The fault entry could have been caused by occasional high resistance at contacts.

Remedy:

The remedy refers only to the model series listed and is not compatible with other published TIPS documents for other
model series.
If all the test steps stored in XENTRY Diagnostics have been performed and no component faults were found, the following work must be carried out:
•
Replace the female contacts at the connector/ feed line of the accelerator pedal sensor (B37).
•
These could be female contacts of the contact family MLK 1.2, which must be replaced by female contacts of the
contact family MCP 1.2 LL (safety spring) (see parts table).
•
The coupling housing is suitable for both families of female contacts and can be reused.
Only in model 205 before code 809 (Facelift) and model 253:
- Disconnect engine control unit "plug connector - F" once and reconnect.
Please do not replace any other components (e.g. accelerator pedal sensor).
Reoccurrence of the complaint:
1.
If the fault occurs again, or if this is a reoccurrence of the same complaint, please make sure that the female
contacts have been crimped properly.
2.
In case of doubt, please repeat the repair. Historically, we have seen repetition of the repair to be effective.
3.
If the complaint reoccurs after the second repair attempt, please create a PTSS case with informative photos of
all six crimps on the female contacts.

Symptoms
Power generation / Engine management / Indicator lamp / Engine diagnosis / lit
Chassis/suspension / Brake system / Brakes/traction regulation system / Brake assist system BAS / Display message / Brake assist - not available
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Chassis/suspension / Brake system / Brakes/traction regulation system / Starting-off aid / Malfunction
Chassis/suspension / Brake system / Brakes/traction regulation system / Brake assist system BAS / Indicator lamp /
Goes on
Communication/information / Assistance and warning systems / Brake Assist / Malfunction
Chassis/suspension / Brake system / Brakes/traction regulation system / Electronic Stability Program (ESP) / Display
message

Control unit/fault code
Control unit

Fault code

Fault text

N3/9 - Motor electronics
'CR43' for combustion engine
'OM651' (CDI)

P213800

The values from the position sensors of the accelerator pedal are
implausible relative to each other. _

N3/10 - Motor electronics
'MED40' for combustion engine 'M274' (ME)

P060D64

There is an internal control unit fault affecting the calculation of
the accelerator pedal position. There is an implausible signal.

N127 - Control unit
'Powertrain' (PTCU) (CPC_
NG) (C (205))

P213800

The values from the position sensors of the accelerator pedal are
implausible relative to each other. _

N30/4 - Electronic stability pro- U040181
gram (ESP®) (ESP167) (C
(205))

Implausible data were received from control unit 'combustion engine'. Incorrect data were received.

N30/4 - Electronic stability pro- U0401EC
gram (ESP®) (ESP167) (C
(205))

Implausible data were received from control unit 'combustion engine'. _

N30/4 - Electronic stability pro- U0401FC
gram (ESP®) (ESP167) (C
(205))

Implausible data were received from control unit 'combustion engine'. _

N30/4 - Electronic stability pro- U0416FA
gram (ESP®) (ESP167) (C
(205))

Implausible data were received from control unit 'Traction system'. _

N3/9 - Motor electronics
'CR43' for combustion engine
'OM651' (CDI)

P212100

Position sensor 1 for the accelerator pedal has a malfunction. _

N3/9 - Motor electronics
'CR43' for combustion engine
'OM651' (CDI)

P2121FA

Position sensor 1 for the accelerator pedal has a malfunction. _

N3/9 - Motor electronics
'CR43' for combustion engine
'OM651' (CDI)

P212164

Position sensor 1 for the accelerator pedal has a malfunction.
There is an implausible signal.

Parts
Part number

ES1 ES2 Designation

Quantity Note

EPC

A 021 545 13 26

Female contact MCP 1.2 LL

6

B37 - Accelerator pedal sensor

X

A 000 545 69 80

Single-wire seal

6

B37 - Accelerator pedal sensor

X

W22058901992 5

Release tool MLK 1.2

1

Special tool

W22058904991 0

Crimping set MCP 1.2 ELA

1

Special tool

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Operation numbers/damage codes
Op. no.

Operation text

Time

Damage
code

Note

59202 74

Connector/line for accelerator pedal
sensor

WIS-References
Document number

Title

AR00.19-P-0100A

Wiring harness general repair methods

Remedy

AR54.18-P-0100-06A

Repair wiring harness using
axial solder connectors

Remedy

AH00.19-P-1000-11A

Notes on protecting lines

Remedy

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Note

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Allocation

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