Chassis
generic / SAE
C0020
ABS Pump Motor Circuit
The ABS control module detects an electrical fault in the pump motor circuit. Without a working pump, the system cannot build hydraulic pressure for ABS or stability control interventions and disables those functions.
SystemChassis
Typegeneric / SAE
GroupC0
Range / number– / 20
Possible causes
- Pump motor seized after long inactivity high
- Pump motor relay welded or open medium
- Power supply connection corroded medium
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 300–1400 €
- Estimated time: 1.5–5 h
- Component: abs pump motor
- Component: abs control module
- Component: pump motor relay
- Component: power supply wiring
Sources
References
sae:J2012