Chassis, generic

C052F ABS Pump Motor Supply Voltage Circuit/Open

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

The pump motor has its own battery feed, separate from the logic supply, and this code reports that feed as missing or open. Mitsubishi's 2023 Outlander PHEV manual shows the layout: motor and motor relay draw from a 60 A fusible link and must see 10–16 V at the unit connector, the valves from a separate 50 A link, the electronics from a 5 A fuse. Mitsubishi itself reports such a loss through its pump motor code and lists fuse, fusible link and 12 V battery as causes, not via C052F. An AlliedSignal patent (now Bosch) logs a separate fault when the motor voltage at switch-off is below about 7 V. Because the electronics stay powered, the module still communicates and lights the ABS lamp while the pump is dead.

Likely causes

Pump motor fuse or fusible link blown
Corroded or loose battery feed terminal at the ABS connector
Open or high-resistance ground of the ABS unit

Symptoms

  • ABS and ESC warning lamps on
  • Pump motor never runs, ABS and stability control off

Repair estimate

DifficultyMediumDIY possible
Parts and labour€10–400
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

abs pump motorfuse

Related codes

C055AC055BC055CC052C

References: mitsubishitechinfo.com, mitsubishitechinfo.com, patents.google.com, static.nhtsa.gov.