Electrical/Instrument - Time and Date Lost In Sleep Mode
SI B 62 02 10Instruments
February 2010
Technical Service
SUBJECT
Time and Date Lost When Vehicle Sleeps
MODEL
E60, E61 (5 Series)
SITUATION
When the vehicle sits for more than an hour (vehicle enters sleep mode), and then the customer returns to the vehicle and starts the vehicle, the time and date memory are lost and need to be reset.
KOMBI fault code "A559 Instrument Cluster: power supply switched off" is stored.
On vehicles produced after 3/2007, the DSC/DXC warning lamp may also be illuminated, and fault code "5EBA Steering angle sensor, plausibility" is stored. Refer to SI B34 04 07 for further information about this fault.
CAUSE
The vehicle electrical system has experienced an under voltage situation which may compromise the starting capability of the vehicle. Terminal 30g-f was reset or switched off by the KGM (Body Gateway Module). The following can cause the terminal 30g-f relay to reset or switch off:
^ The battery reached the starting capability limit at terminal R off.
^ 60 minutes after terminal R off, the vehicle has not yet switched into sleep mode.
^ The vehicle was wakened unexpectedly at terminal R off more than 30 times.
PROCEDURE
Troubleshoot any voltage-related faults. Perform the energy diagnosis test plan (B6131_60112) using the most current version of ISTA.
The results of the energy diagnosis test plan will be displayed after the test plan reads and analyzes the data from the vehicle. Always start with the most likely cause and work your way down the list. Based on the results, proceed as follows:
1. If the energy diagnosis indicates "Frequent wake-ups" as the most likely cause, follow the recommendation in the test plan. In order for the test plan to yield proper results, the battery must have a sufficient charge. This includes reading and clearing the wake-ups and letting the vehicle sit unattended for an extended period. The ISTA session can be "Interrupted". Later return to diagnosis (opening the interrupted session) and perform the service function for "B6131_60102- Analysis of bus wake-ups".The test plan can be accessed via the following path: "Service function/Body/Power supply/waking of vehicle/Analysis of prompters; or via "Text search". Further troubleshooting is provided in the FUB (functional description) document provided in the test plan.
2. If the energy diagnosis indicates that "Closed-circuit current fault" or "Closed-circuit current monitoring" is the most likely cause, follow the recommendation in the test plan and troubleshoot as per SI B61 08 00, using the 50 or 100 AMP clip-on probe and the IMIB (Integrated Measurement Interface Box).
3. If the energy diagnosis indicates that "Unfavorable customer profile" was the most likely cause, this needs to be brought to the attention of the customer in order for it not to happen again. Unfavorable customer profiles consist of: "Terminal 15 or Terminal R was switched on for too long"; "Sidelights, parking light or hazard warning lights were switch on for too long"; "Long parking periods"; or "Unfavorable driving profile". In most cases, these are not considered warranty. Please refer to SI B61 13 05.
4. If the energy diagnosis indicates that "Terminal 30 g-f shutdown" was the most likely cause and no other causes are listed, this usually indicates a weak or faulty battery. Test the battery using the BMW battery tester as per SI B61 11 09, and replace if necessary.
Note that batteries, like light bulbs, have a specific life, and therefore wear out. Depending on the usage of the vehicle and the demands put on the electrical system by the vehicle owner, battery wear-out (battery failure) may occur within the warranty period. The replacement battery must be the same type as the failed battery. Upgrades from a wet battery to an AGM (Advanced Glass Mat) battery are not allowed under warranty, unless the upgraded battery is specifically listed by the Parts department as the replacement part.
5. If the energy diagnosis indicates that "No causes" are listed, this usually indicates a weak or faulty battery. Test the battery using the BMW battery tester as per SI B61 11 09, and replace if necessary. See the notes above regarding battery replacement.
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.
Defect Code: Refer to KDS
Labor Operation: Labor Allowance: Description:
Refer to KDS Refer to KDS Refer to KDS
Note that battery replacements must be the same type as the failed battery. Upgrading from a wet battery to an AGM battery is not acceptable as a warranty claim unless listed by the Parts department.