LI54.10-P-052655 Service Bulletin/Repair Instructions

smart ed - 12V battery discharged, undervoltage, vehicle not

drivable, fault messages concerning electric drive system

Topic number
LI54.10-P-052655
Version
3
Design group
54.10 Battery, voltage supply, voltage converter
Date
02-20-2013
Validity
451ev2 (smart electric drive Phase 2)
Reason for change
Software version updated
Reason for block
Complaint:
- Complaints relating to drive system/ vehicle cannot be started

- IC illumination and indicator lamps flicker

- 12V battery has insufficient voltage (discharged)

- Fault messages (Check Engine lamp ON in yellow/red) due to undervoltage

(This is identifiable from the message "Primary ign volt" in the Zytek snapshot:

At a voltage below 11.5V in this column, consequential faults in other systems are also possible)
Cause:
The following causes are possible in these situations:

- Drive system: Due to short-distance operations with frequent ignition cycles the 12V battery is insufficiently recharged or is excessively discharged during the operating period

- DC/DC converter: If there is a defect in the DC/DC converter, the 12V battery is not recharged sufficiently

- Additional consumers: Aftermarket accessories, such as light bars, two-way radios, Fleet Management or position

tracking equipment, place an additional load on the 12V on-board electrical system
Remedy:
1. Perform update of BMS to version 1.3.9 and EVCM/EDCM/OS to version 2E1.

(Note: With this software version the 12V battery is assisted even after charging is complete if the vehicle is

connected to the charging infrastructure.)

2. Check 12V battery using Midtronics tester, as required (test result) if necessary, replace 12V battery with an AGM

battery (see below for part number).

Depending on the vehicle body status it may be necessary to replace the battery bracket.

3. Check function of DC/DC converter (charging of 12V battery):

a) Check function (charge voltage) of DC/DC converter at key position 1

b) Check function (charge voltage) of DC/DC converter with activated charging of the high-voltage battery.

02-20-2013 3:54 PM

© Copyright Daimler AG
RWEINGA
Page 1/3
c) Unplug low-voltage connector from EDCM and check connection (condition of pins + correct locking of pins in

connector)

d) Check voltage between pins 23 and 14/15 on detached low-voltage connector of EDCM (12V must be present)

e) Check ground lines and ground connections (particularly the EDCM ground strap)

The voltage value must not drop below 13V when under load (i.e. including when driving lights and the radio are switched on). This value should be measured as close as possible to the 12V on-board electrical system battery using a

multimeter when the vehicle is at standstill + when it is driving. If the charging function of the DC/DC converter is not

OK, then create a TIPS case with all the information from the above-mentioned test steps.

4. Check whether additional consumers (accessories not belonging to the vehicle's standard equipment) are installed in the vehicle. In this case, the customer must be notified of the fact that retrofitting on this vehicle is not permitted (see vehicle lease contract) and that any such retrofitted parts must be removed subject to a separate invoice (not

W&G).

5. If the above tests are OK, please interview the driver about his driving style. You can also identify short-distance

operations by comparing the message "Ignition Cycles" in the Zytek snapshot with the current mileage (mileage/ignition cycles). If the vehicle is operated for short-distances only, please refer the customer to the following usage instructions:

a) If possible, start the charging process for the HV battery at the end of each journey (by connecting the vehicle to

the socket or wall box/charging station with the charging cable)

Note: During the HV battery charging process the 12V battery is recharged at the same time.

b) If the driver remains in his seat during short breaks in driving (e.g. while waiting), the ignition should not be switched off if possible.

Note: When the ignition is on, the 12V battery is recharged from the HV battery via the DC/DC converter.

Important: Make sure that the vehicle is secured to prevent it from rolling, e.g. by engaging P or by applying the

parking brake/service brake.

c) For longer idle periods (4-6 weeks or more) the 12V battery should be disconnected
Symptoms

Overall vehicle / Power supply / Alternator / Alternator function / Does not charge

Overall vehicle / Power supply / Alternator / Alternator function / Output too low

Power generation / Engine management / Engine management, display message / Displays fault code

Overall vehicle / Power supply / Battery/On-board electrical system / Battery/on-board electrical system indicator

lamp / Battery charge indicator/consumer shutoff / Illuminates red

Power generation / Engine management / Engine management indicator lamp / Engine diagnosis / lit

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

Power generation / Engine management / Engine management, function / Nonfunctional

Power generation / Engine management / Electric drive / Nonfunctional
Parts

Part number
ES1 ES2 Designation
02-20-2013 3:54 PM

© Copyright Daimler AG
Quantity Note
RWEINGA
EPC Other

make

part
Page 2/3
A 000 982 86 08
12V battery
1
60Ah AGM type
X
A 451 540 01 73
Battery bracket
1
Only where necessary (dependent on vehicle condition)
X
Validity

Vehicle
Engine
Transmission
451.391
*
*
451.491
*
*
02-20-2013 3:54 PM

© Copyright Daimler AG
RWEINGA
Page 3/3

Bestseller No. 1

KINGBOLEN Ediag Elite OBD2 Scanner Bluetooth, Bidirectional Test Scanner All System Diagnostic Tool for iOS & Android, 15+ Hot Reset, CANFD Protocol, FCA AutoAuth, No Subscriptions Lifetime Update

OBD2 Bluetooth Scanner Lifetime Update: Ediag Elite offers revolutionary Advantage Lifetime Updates with unlimited access to the superior 15+ reset service, bidirectional testing and full system diagnostics.The Ediag Elite is an excellent Bluetooth OBD2 scanner diagnostic tool ideal for DIY's and private car owners.
Bidirectional Test for Quickly Locating Problems: The Bidirectional Scan tool allows you to send commands directly from your smartphone to your vehicle for active testing. This feature helps to quickly narrow down problems such as air conditioning clutches, windows, doors, sunroofs, etc., reducing diagnostic time for mechanics and helping DIY users locate faults more easily. In addition, Ediag Elite provides fault analysis and repair guidance to help you solve problems efficiently.
15+ Maintenance Resets: The current version introduces 15+ popular special features: Oil Reset, Headlight Matching, Bleeding Reset, TPMS Reset, BMS Reset, Gear Box Relearn, Throttle Learning, Injector Coding, SAS Reset and more special functions in system diagnose menu. These functions make it easy for owners to carry out the necessary maintenance and servicing, ensuring that your vehicle stays in top condition, prolonging its service life and preventing common problems and breakdowns. Note: The Special function vary by model& year, Reach us check compatibility.
Wide Compatibility CANFD & FCA Autoauth: Compatible with GM, Ford, Toyota, Chrysler, Honda, Mazda, Nissan, Mitsubishi, Hyundai, KIA with standard OBD2 port from 1996 to newer. More car brands and features will be released gradually. Newest Ediag Elite scanner supports CANFD Protocol and FCA cars. Note: Coverage may vary on different vehicle by model& year ,Please contact us to confirm compatibility before purchase.
Perfect for Monitoring The Health of Your Vehicle: Ediag Elite is designed to make vehicle maintenance simple and efficient. With intelligent Auto VIN quick recognition, it is easy to connect to your car without the need for manual input. Real-time data is visualized in a variety of formats, including graphs, numeric, meter displays and clear 4-in-1 data charts, allowing you to effortlessly monitor real-time data. Data logging/reporting is available for playback and further analysis

SaleBestseller No. 2

KINGBOLEN K7 Bidirectional Scan Tool 2026 OBD2 Scanner Bluetooth with Lifetime Updates, No Annual Fees, 31+ Resets, Component Matching, All System Diagnostic, CAN FD, FCA AutoAuth, Crankshaft Relearn

No Annual Fees & 2026 Upgraded CAN FD: Why pay $199/year or more for updates? The 2026 newest Kingbolen K7 obd2 scanner features have been upgraded to Lifetime Updates without subscription fees, saving you significant costs in the long run. K7 scan tool also adds the CAN FD protocol for the latest GM models (2019+), enabling faster data transfer, reducing the risk of undetected errors
2026 Newest Top-tier Car Scanner: Kingbolen K7 diagnostic scan tool is equipped with most capabilities for daily repair/maintenance: Wireless diagnosis via Bluetooth, Bidirectional Test, ECU Online/Offline Code, 31+ Resets, PMI for Ford, Lincoln, Mazda, Global version for 100+ brand vehicles and 17 languages, no area limit, FCA AutoAuth
OE-Level Full Systems Scan Tool: K7 professional diagnostic scanner with Auto Vin can do one-click to scan ECUs on most of vehicles, like pcm, ecm, eps, bcm, tpms, sas, a/c system... to read/clear code, view live data, freeze frame, read ecu info. 4-in-1 data stream graphics can make data viewing more intuitive. Detailed diagnostic reports will help you easily master the car situation as it can be shared by bluetooth or email! Adding workshop information can help your customers to know more
Bidirectional Test/Active Test & ECU Code: Stop guessing and start fixing. Bidirectional scan tool Kingbolen K7 can perform real active test that can send commands to the vehicle's ECU to drive the actuators to work, like window, rear mirrors, sunroof, door, solenoids, wipers, headlamp, etc, helping you quickly find out bad parts and pinpoint faulty issues. K7 bidirectional scanner will be a good choice to save money and time on car repairs when performing complex maintenance and repair
31 Reset Functions: Avoid expensive dealership visits for simple services. Experience tells us that just a small repair service may cost a lot of money. Kingbolen K7 is a professional diagnostic scanner with 31 common maintenance services like Oil /SAS/EPB/TPMS Reset, Battery Matching, ABS Bleeding, Injector Code, etc. It effectively handles most of the car reset and relearning jobs, perfect for experienced DIYers and mechanics. Note: Functions in the menu vary across vehicles. Kindly check the compatibility before purchase

SaleBestseller No. 3

KINGBOLEN OBD2 Scanner S608, 2026 Bidirectional Scan Tool for ABS/SRS/Transmission/Engine, 9 Resets Oil Brake DPF Bleed Gear Injector Throttle BMS SAS, CAN FD & FCA/Renault SGW, Lifetime Free Update

WHY S608 STANDS OUT:2026 Kingbolen S608 is the only scanner <200 bucks that offers powerful active tests on Engine, ABS, SRS, and Transmission systems. Offers 9 resets,Covers 110+ global brands with a 6.2'' larger touchscreen
KINGBOLEN'S NEW BIDIRECTIONAL SCAN TOOL: As the 2026 upgraded version of S600, our Newest S608 obd2 scanner has the powerful Bi-directional Control on Engine, ABS, SRS, and Transmission systems. It can send commands to the ECUs of actuators for functional tests and work status checks, such as ABS, fuel injectors, adjusting throttle, coolant pumps, EVAP test, fuel trim reset, etc. No more Guesswork. Quickly identify problem components without teardown, get fuss-free results in seconds.
【9 HOT RESET SERVICES CAR SCANNER】Tired of costly mechanic trips for common resets? The Kingbolen S608 obd2 scanner lets you do it yourself, even for beginners—quickly and effortlessly! It offers 9 hot reset functions: Oil/EPB Reset, ABS Bleeding, SAS Calibration, DPF Regeneration, Injector Coding, BMS Matching, Throttle Adaptation, Gear Learning. Stop paying mechanics for 5-minute jobs. Save hundreds per year! 🚗*Function vary from vehicle models. reach us to check compatibility firstly!
【4 SYSTEM DIAGNOSTIC TOOL + FULL OBDII FUNCTIONS】Kingbolen S608 is an OBDII scanner and 4 systems diagnostic tool made for home mechanics, DIYers, and professionals. You can access Engine, ABS, SRS, Transmission fault codes, track live data in graphs, and onboard DTC library lookup to find the right troubleshooting procedure, and diagnose with full 10 OBD2 test modes to fix most of emission issues. Give your aging cars routine maintenance to avoid costly repairs, a breakdown, or even a crash.
【NEW CAN FD, FCA/RENAULT SGW, 140+ BRANDS】Kingbolen S608 scanner for car supports 140+ vehicle brands, 100,000+ models, 28 languages and can be used worldwide. S608 stays up-to-date with modern vehicles, allows secure access to 2017+ FCA cars and 2015+ Renault cars (📢*Need to purchase an AutoAuth/Renault account by yourself), and supports the latest CAN-FD protocol for 2019+ GM/Chrysler, enabling 2X faster data transfer and more precise diagnostics. 🚗*Check compatibility before purchase.

This product presentation was made with AAWP plugin.

Last update on 2026-05-11 / Affiliate links / Images from Amazon Product Advertising API

Buffer Email Facebook Flipboard Hacker News LinkedIn Messenger Mix Pinterest Print Reddit SMS Telegram Tumblr X VK WhatsApp Line Xing Threads Bluesky Copy Mastodon Nextdoor