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NHTSA ID Number: 10179957

Manufacturer Communication Number: LI54.10-P-071596

TSB/Document Date: 2020-09-21


Summary

Vehicle does not start / Vehicle cannot be un- locked - starter battery may be discharged


Vehicle does not start / Vehicle cannot be unlocked - starter battery may be discharged
Topic number

LI54.10-P-071596

Version

1

Function group

54.10 Battery, power supply, voltage converter

Date

08-07-2020

Validity

BR167

Reason for change
Reason for block

Complaint:

- Vehicle does not start / Vehicle cannot be unlocked
- Display message in instrument cluster "Battery - Start Engine - see Operator's Manual"

Attachments
File

Description

Beispiel_Buswachhalter.pdf

Example for reading bus keepawake event from electrical
system data

Beispiel Kl. 15 EIN_de.pdf

Example for terminal 15 ON

example terminal 15 active.pdf

Example for terminal 15 ON

example_BUS_keep_awake.pdf

Example for bus keepawake event

Cause:

Bus keepawake control units are flagged up by event code U116000 "A bus keepawake control unit has been detected" in the electronic ignition switch (EZS) control unit.
If prolonged CAN activity (40 mins or longer) is evident in the on-board electrical system data, but this is Not flagged
by the EZS, go directly to cause 3.
Cause 1. The ESP control unit is keeping the CAN bus awake.
Affected software: A1679020202, A1679025704, A1679026603, A1679021403, A1679028301
Cause 2. Concerns All vehicles with code 631/632/640/641/642
LED Head Light Module control unit is keeping the bus awake.
Affected software: A2479026401
08-07-2020 11:33 PM
© Copyright Mercedes-BenzeBay logo AG

RUTHERE

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Cause 3. Only concerns vehicles with CAN activity lasting 40 minutes or longer, and without DTC U116000 in the EZS
The EZS control unit itself is keeping the bus awake

Remedy:

Remedy 1. Flash the ESP with the latest software release
Invoice under damage code 43181-72
Remedy 2. Concerns only vehicles with code 631/632/640/641/642
Flash LED Head Light Module control unit with the latest software release.
Invoice under damage code 82B01- 73
Remedy 3. Replace the EZS.
Invoice under damage code 8000N-54
Remedy 4. Continue with the analysis (create a PTSS case)
The following information is required for the analysis:
- Control unit event log of electronic ignition lock, EZS (N73)
- Control unit event log of SAM-F (N10/6)
- Up-to-date no-load current measurement
For all causes, discuss the following questions with the customer:
- Were there any messages in the instrument cluster?
- Did this behavior occur once only, or has it occurred before?
If so, when (approximately)?
- Was the vehicle parked in a particular location or with high traffic levels?
- Has the vehicle been modified or are there any installations in the vehicle?

Symptoms
Overall vehicle / Power supply / Battery/On-board electrical system / Battery function / Battery discharges
Overall vehicle / Power supply / Battery/On-board electrical system / Battery function / Battery cannot be charged
Overall vehicle / Power supply / Battery/On-board electrical system / Battery/on-board electrical system display message / Low voltage Charge battery
Overall vehicle / Power supply / Battery/On-board electrical system / Battery/on-board electrical system display message / Charging

Parts
Part number

ES1 ES2 Designation

08-07-2020 11:33 PM
© Copyright Mercedes-BenzeBay logo AG

Quantity Note
RUTHERE

EPC

Page 2/3

A 001 982 81 08

80 Ah starter battery

1

X

A 001 982 82 08

92 Ah starter battery

1

X

Operation numbers/damage codes
Op. no.

Operation text

Time

Damage
code

Note

54-1011

PERFORM QUICK TEST

Use the damage code for the component causing the damage!

54-0640

CHECK BATTERY SYSTEM (AFTER
QUICK TEST)

Use the damage code for the component causing the damage!

54-1109

CHECK CONDITION OF BATTERY

Use the damage code for the component causing the damage!

54-1126

REPLACE BATTERY (AFTER CHECK)

Use the damage code for the component causing the damage!

54-0650

MAINTAIN ON-BOARD ELECTRICAL
SYSTEM VOLTAGE (FOR TESTING
AND DIAGNOSIS WORK)

Use the damage code for the component causing the damage!

54-0991

PROGRAM CONTROL UNIT ...............
(AFTER QUICK TEST)

Use the damage code for the component causing the damage!

54-0992

CODE CONTROL UNIT............. (AFTER QUICK TEST)

Use the damage code for the component causing the damage!

54-0645

CHECK NO-LOAD CURRENT CONSUMPTION

Use the damage code for the component causing the damage!

54-2536

REPLACE ELECTRONIC IGNITION
LOCK CONTROL UNIT (AFTER QUICK
TEST)

Use the damage code for the component causing the damage!

WIS-References
Document number

Title

AR54.10-P-1129LW

Battery - Check condition

Cause

AR54.10-P-1130LW

Charge battery

Remedy

AR54.21-P-0038ME

Remove/install electronic
ignition lock control unit

Remedy

08-07-2020 11:33 PM
© Copyright Mercedes-BenzeBay logo AG

Note

RUTHERE

Allocation

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1

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TSB/Document ID: LI54.10-P-071596

Replacement Service Bulletin Number:

MFR Communication Date: 2020-08-07

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: ELECTRICAL SYSTEM:STARTER ASSEMBLY

MFR Component System:

MFR Component Subsystem:


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