LI54 10-P-066344

Vehicle does not start, battery discharged.
Topic number
LI54.10-P-066344
Version
4
Function group
54.10 Battery, power supply, voltage converter
Date
10-26-2017
Validity
BR166/ BR292
Reason for change
Remedy for Cause 1 available
Reason for block
Complaint:
Vehicle does not start, battery discharged.
The on-board electrical system data indicates a high discharge in the engine-off cycle; "CAN bus awake unusually
long", "Charge balance UNUSUAL"
Attachments
File
Description
example_BUS_keep_awake.pdf
Example_BUS_keep_awake
Beispiel_Buswachhalter.pdf
Example_bus keepawake control unit
Cause:
To be able to assess whether a bus keepawake event caused the battery discharge, it is necessary to examine the
stationary cycles. A constantly active CAN is identified by the text "Interior CAN awake unusually long" (see attachment). If this text is not displayed, the battery discharge has a different cause.
Cause 1:
IC (instrument cluster) is keeping the CAN bus awake. Vehicle battery is being discharged. Affects
vehicles with Sales Codes 807 and 808 with production date up to to July 2017
Fault code identification:
1. Affects vehicles with code 807 and 808 with production date up to July 2017
2. The on-board electrical system data indicates a high discharge in the engine-off cycle; "CAN bus awake unusually
long", "Charge balance UNUSUAL"
3. The bus keepawake entry names the IC
Cause 2:
HERMES is keeping the CAN bus awake, only affects USA (code 494). Refer to LI82.85-P-066086
With code 362 (HERMES LTE communication module), code 522 (Audio 20) and code 807 (Model year 2017)
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© Copyright Daimler AG
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IMPORTANT:
***If the vehicle does not match Cause 1 or 2 but the OBS data indicates a high discharge in the engine-off cycle;
"CAN bus awake unusually long", "Charge balance UNUSUAL" please open a PTSS Case, see "Remedy" 3 below.***
Remedy:
Remedy 1:
Flash instrument cluster
Software available as of XENTRY DVD 09
Damage code: 54201-54
Remedy 2:
Refer to LI82.85-P-066086
Damage code: 8209Z-90
"Remedy" 3:
**If not identified in Cause 1 or 2, but the OBS data indicates a high discharge in the engine-off cycle; "CAN bus awake unusually long", "Charge balance UNUSUAL" please create a PTSS case with all the documents listed below and
include in the case attachments.**
Documents needed in case attachments:
1. Quick test
2. Control units event log for signal acquisition and actuation module (SAM)
3. Bus keepawake event detection (from EIS --> Actual values)
3.1. Last bus keepawake entry
3.2. Last-but-one bus keepawake entry
4. Up-to-date quiescent current measurement.
Symptoms
Overall vehicle / Power supply / Battery/On-board electrical system / Battery function / Battery discharges
Operation numbers/damage codes
Op. no.
Operation text
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© Copyright Daimler AG
Time
MYNELSO
Damage
code
Note
54201 54
Instrument cluster - no-load current
too high
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8209Z 90
Communication module for telematics service - software release
Validity
Vehicle
Engine
Transmission
GL/GLS (166)
*
*
GLE (292)
*
*
M/GLE (166)
*
*
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© Copyright Daimler AG
MYNELSO
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CAN activity during the entire park
cycle when vehicle is locked!
Interior CAN bus is
awake unusually long.
Charging balance
suspicious.
BODY-CAN keeps
awake – technical
issue