Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2008M5 (E60) V10-5.0L (S85)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSCUSTOMER INTERESTELECTRICAL - BATTERY DISCHARGED/CODE 93AB SET
2008 BMW M5 (E60) V10-5.0L (S85)
Electrical - Battery Discharged/Code 93AB Set
2008 BMW M5 (E60) V10-5.0L (S85)SECTION Electrical - Battery Discharged/Code 93AB Set
SI B 61 14 07
General Electrical Systems
December 2007
Technical Service
SUBJECT
Battery Discharged KGM FC 93AB MPM Relay Sticking
MODEL
E60, E61 (5 Series) from 9/05 production
E63, E64 (6 Series) from 9/05 production
SITUATION
The customer states that the "High Rate of Battery Discharge" check control message is displayed. A short test indicates KGM (Body Gateway Module) fault code "93AB MPM Relay Sticking" is one of many faults stored in the vehicle.
CAUSE
Battery discharged
PROCEDURE
Check the operation of the KGM MPM relay as follows:
1. After a short test is performed, follow the test plan linked to KGM fault code 93AB.
2. Continue in the test plan and select "[2] Function check MPM".
3. In the next step of the test plan, the MPM relay is switched from off to on.
4. If the relay is working properly, the CCC, MASK or CHAMP will switch off and on.
5. If the component switches off and on, the KGM is working properly and should not be replaced.
6. If the KGM is not switching the MPM, replace the KGM (note: in most cases the KGM is not faulty).
7. Continue troubleshooting the battery discharged issue by completing the "Energy Diagnosis" test plan. Refer to SI B61 13 05 and SI B61 08 00 for further information.
8. A revision to the DIS test plan will be made for this fault with DIS V53.
WARRANTY INFORMATION
For information only.
Disclaimer
General Electrical Systems
December 2007
Technical Service
SUBJECT
Battery Discharged KGM FC 93AB MPM Relay Sticking
MODEL
E60, E61 (5 Series) from 9/05 production
E63, E64 (6 Series) from 9/05 production
SITUATION
The customer states that the "High Rate of Battery Discharge" check control message is displayed. A short test indicates KGM (Body Gateway Module) fault code "93AB MPM Relay Sticking" is one of many faults stored in the vehicle.
CAUSE
Battery discharged
PROCEDURE
Check the operation of the KGM MPM relay as follows:
1. After a short test is performed, follow the test plan linked to KGM fault code 93AB.
2. Continue in the test plan and select "[2] Function check MPM".
3. In the next step of the test plan, the MPM relay is switched from off to on.
4. If the relay is working properly, the CCC, MASK or CHAMP will switch off and on.
5. If the component switches off and on, the KGM is working properly and should not be replaced.
6. If the KGM is not switching the MPM, replace the KGM (note: in most cases the KGM is not faulty).
7. Continue troubleshooting the battery discharged issue by completing the "Energy Diagnosis" test plan. Refer to SI B61 13 05 and SI B61 08 00 for further information.
8. A revision to the DIS test plan will be made for this fault with DIS V53.
WARRANTY INFORMATION
For information only.
Disclaimer
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.