Network
generic / SAE
U0244
Lost Communication With Running Board Control Module A
ECU lost communication with running board (power side step) control module A. A communication loss with this module breaks any function relying on its data — diagnostic tools may show 'no response' and dependent modules can fall into limp mode.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number2 / 44
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: medium
- DIY: possible
- Estimated cost: 100–1000 €
- Estimated time: 0.5–4 h
- Component: running board module a
- Component: can bus
- MIL / check engine light
Sources
References
sae:J2012