Network
generic / SAE
U014C
Lost Communication With Battery Energy Control Module D
ECU lost CAN communication with battery energy control module D (hybrid/EV high-voltage battery management).
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number1 / 4C
Possible causes
- Module unpowered high
- Gateway module routing CAN messages incorrectly low
- CAN terminating resistor (120 Ω) drifted out of spec low
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–2500 €
- Estimated time: 1–8 h
- Component: battery energy module d
- Component: can bus
- MIL / check engine light
- drive cycle required
- limp mode possible
Sources
References
sae:J2012