What does it mean?
B2310 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Rear Washer Switch Input Circuit Low .
Symptoms
- The driver mirror does not move when a memory button or the key fob memory function is used.
- The mirror moves to a slightly different place each time, or stops part way.
- New memory positions cannot be stored for that mirror.
- Automatic tilt down in reverse or mirror folding no longer works while manual adjustment still does.
- Seat and column memory recall may fail at the same time when they share the module.
Likely causes
- Mirror position feedback signal outside its learned range because the mirror glass was pushed by hand, a car wash or an impact.
- Broken conductor in the door harness where it passes through the rubber boot between the door and the body.
- Corroded or loose mirror connector, often after water has entered the mirror housing or the door.
- Memory positions never programmed for the driver mirror, or lost after a battery disconnection or module replacement.
- Mirror actuator binding, stripped drive gear or a motor that stalls before the stored position.
- Voltage drop during recall because of a weak battery or a poor door module ground.
- Memory or door module internal fault.
How to fix it
- Read the body and door module codes and check whether both mirror axes or only one report a fault.
- Watch the mirror position feedback values live while moving the mirror slowly with the manual switch in both axes.
- Look for a value that drops out, sticks or jumps, which identifies the failing potentiometer or the broken wire.
- Flex the door harness inside the rubber boot during the measurement, since this is where conductors usually break.
- Confirm the module supply and ground stay stable while the mirror motors run, and test the battery and charging system.
- Repair the harness or connector, dry and reseal the mirror if water has entered it, then reprogram the memory positions.
- Replace the mirror actuator or the memory module only after the wiring and feedback signals have been proven.