Battery discharged, vehicle does not start - Event code U116000 "A
bus keepawake event has been detected" is logged in the quick test
Topic number

LI54.10-P-064762

Version

10

Function group

54.10 Battery, power supply, voltage converter

Date

11-26-2018

Validity

BR 213, 238, 257, 217 (> code 808), 222 (> code 808),
205 (> code 809)

Reason for change

New BR 257
Remedy no. 4 revised

Reason for block

Complaint:

Battery discharged, vehicle does not start
Event code U116000 "A bus keepawake event has been detected" is logged in the quick test (electronic ignition lock
EZS (N73))

Cause:

The bus keepawake events are shown in the EZS control unit log under "Note to gateway event code" and are visible
as of Xentry Release 7.
Various possible causes.
1. Only affects BR213
The electronic ignition lock (EZS) control unit (N73) crashes. Event code: FF-FFFFFF
This causes the CAN BUS to be kept awake. A reset by the (internal) battery disconnect switch is not effective.
2. Only affects BR213
The Keyless-Go control unit (N69/5) crashes. Event code: 20-040000
This causes the CAN BUS to be kept awake. A reset by the (internal) battery disconnect switch is not effective.
3. BR 213, 238, 217 (> code 808), 222 (> code 808)
Customer had activated the hazard warning lights for longer than 15 min. Event code: 09-100000
During hazard warning lights "ON", all CAN BUS systems are awake and active. Required current approx. 20 Ah.
4. BR 213, 238, 217 (> code 808), 222 (> code 808) only vehicles with code 896: Vehicle access and vehicle start via
smartphone
11-26-2018 5:19 PM
© Copyright Daimler AG

MYNELSO

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The electronic ignition lock (EZS) control unit (N73) causes a bus keepawake event.
Event code: FF-FFFFFF in combination with code 896: Vehicle access and vehicle start via smartphone
Software error in electronic ignition lock (EZS) control unit (N73). The search for a functioning smartphone is not aborted under some circumstances, resulting in discharge of the 12 V starter battery.
Faulty software: A213 902 51 02 or A213 902 66 10.
5. BR 213, 238, 217 (> code 808), 222 (> code 808), 205 (> code 809)
The Electronic Stability Program system (ESP system) control unit (N30/4) causes a bus keepawake event. Event code: 87-000000;
6. Please see remedy #6 below for further instruction if none of the criteria above matches.

Remedy:

1. Only affects BR213
Event code: FF-FFFFFF
Up to production date 01.02.2017; up to FIN ...A2086618
--> Flash EZS
Invoice under damage code 8000N-90
2. Only affects BR213
Event code: 20-040000
Up to production date 17.05.2017;
--> Flash Key-Go control unit (N69/5) with new SW (min. A213 902 17 12).
Invoice to damage code 82190-90
3. BR 213, 238, 217 (only code 808), 222 (only code 808)
Event code: 09-100000
This is not a vehicle fault. Charge the battery and return the vehicle to the customer.
4. BR 213, 238, 217 (only code 808), 222 (only code 808)
Event code: FF-FFFFFF with vehicle code 896
--> Flash EZS (at least DVD07/2018 with addon 10872)
Invoice under damage code 8000N-90
Invoice under damage code 46262-90
5. BR 213, 238, 217 (> code 808), 222 (> code 808), 205 (> code 809)
Event code: 87-000000
--> Replace ESP control unit (including hydraulic unit)
11-26-2018 5:19 PM
© Copyright Daimler AG

MYNELSO

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Invoice under damage code 43181-90
6. Open PTSS case include required documentation and information below:
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
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 / Quiescent current/consumer shutoff / Does not switch off
Overall vehicle / Power supply / Battery/On-board electrical system / Battery/on-board electrical system display message / Low voltage Charge battery

Control unit/fault code
Control unit

Fault code

Fault text

N10/6 - Front signal acquisition and actuation module (Driverside SAM) (BC_F213)

-

N73 - Electronic ignition lock
(EZS) (EZS213)

A bus keepawake unit was detected. _

U116000

Operation numbers/damage codes
Op. no.

Operation text

54-1135

CHARGE BATTERY

11-26-2018 5:19 PM
© Copyright Daimler AG

Time

MYNELSO

Damage
code

Note

8000N 90

Flash EZS control unit N73

82190 90

Flash Key-Go control unit N69/5

46262 90

Flash EZS control unit N73

43181 90

Flash traction control system control
unit (N30/4)

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