Body, generic

B0132 A/V Sensor Washer Fluid D Control Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0132 concerns washer fluid channel D of a self-driving vehicle's sensor cleaning, the fourth in the series that starts at B012F. In Uber's patent US10173646B1 the vehicle computer judges how dirty each sensor is and then works out a cleaning order, so the cleaning units fire one after another instead of all at once; a dead channel removes one sensor from that rotation. Rain, snow, road salt, pollen, insect remains and bird droppings are the deposits named there. A KTH thesis written for Scania compared cleaning methods for heavy autonomous trucks and tuned fluid use by varying pump output. Nobody publishes which sensor sits on channel D, and no carmaker documents B0132. Typical faults are an open pump circuit or a short in its supply.

Likely causes

Open circuit in the channel D pump or valve, often a burnt-out winding
Supply or control lead of channel D shorted to ground or battery voltage
Pump blocked by frozen or contaminated fluid, drawing excess current

Symptoms

  • Sensor D is skipped in the cleaning sequence and stays dirty
  • Automated driving may limit itself or ask the driver to take over

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–400
Time0.3–2 h

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

Parts involved

av washer fluid pump dpump wiring

Related codes

B012FB0130B0131B0133B0134

References: patents.google.com, diva-portal.org, patents.google.com.