Network
generic / SAE
U013F
Lost Communication With Pedestrian Alert Control Module
ECU lost CAN communication with the pedestrian alert (acoustic vehicle alerting) module — required by law on EVs/hybrids at low speed.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number1 / 3F
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: shop recommended
- Estimated cost: 80–800 €
- Estimated time: 0.5–3 h
- Component: pedestrian alert module
- Component: can bus
- MIL / check engine light
- drive cycle required
Sources
References
sae:J2012