C052BABS Pump Motor Control Range/Performance
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Range/performance fault of the ABS pump motor: the drive is commanded, but the motor or its relay does not behave as expected. On the 2023 Mitsubishi Outlander PHEV the brake unit maps C1051-04 (and C1051-49, added by bulletin TSB-23-35-002) to C052B; it is checked with normal supply voltage, set within 12 s; after a single trip the ASC, ABS and brake warnings plus the check-engine lamp come on. ESC, traction control, ABS, EBD, brake assist and regenerative braking are suspended. An AlliedSignal patent, now held by Bosch, shows one test: a healthy motor coasts after switch-off and its voltage decays slowly, so a decay faster than about 134 V/s marks a motor that did not turn. Usually motor or pump in the hydraulic unit are worn or seized; basic braking stays.
- What you may notice
- ABS, ESC and brake warning lamps on
- ABS and stability control unavailable, normal braking remains
- No pump noise during the self-test after starting off
- Likely causes
- LikelyPump motor worn (brushes) or pump seized in the hydraulic unit
- PossibleMotor relay or switching stage in the ABS unit faulty
- PossibleMarginal supply or ground connection under motor load
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.