Network
generic / SAE
U0151
Lost Communication with Restraints Control Module
The Restraints Control Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. The airbag/restraints controller is unreachable — airbags and belt tensioners may not deploy. Safety-critical. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number1 / 51
Possible causes
- SRS module unpowered (often water damage under seat) high
- CAN wiring to SRS broken medium
- Gateway module routing CAN messages incorrectly 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: 150–2000 €
- Estimated time: 1–5 h
- Component: restraints control module
- Component: can bus wiring
- MIL / check engine light
Sources
References
sae:J2012