What does it mean?
B2182 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Heated Seat Module Power Supply High .
Symptoms
- Passenger front window goes up by itself or will not stop
- Window will not operate from the master switch but still works from its own switch
- One touch and express up or down functions lost
- Other window inputs on the same switch pack also behave strangely
- Module stays awake and the battery goes flat if the car is left standing
- Window position may need relearning after the fault is fixed
Likely causes
- Liquid spilled into the driver master switch, by far the most common cause on this circuit
- Wiring chafed inside the rubber boot between the door and the pillar, touching a live feed
- Connector terminal pushed back so it contacts an adjacent battery supply pin
- Master switch with internal corrosion bridging the input to the supply
- Aftermarket window closer or alarm module wired into the window switch circuit
- Water inside the door module connector from a blocked door drain or a torn vapour barrier
- Damaged loom in the passenger door if the fault is on the remote side of the circuit
- Door or body module input failure once the switch and harness are cleared
How to fix it
- Confirm the manufacturer definition and the pin for the passenger front up input
- Disconnect the master switch and measure the input circuit for voltage with the key on
- Voltage present with the switch unplugged means the harness is shorted to a live feed
- No voltage with the switch unplugged points at a shorted or contaminated master switch
- Open the door boot and inspect the loom for chafing, broken strands and green corrosion
- Check the door module connector and the vapour barrier for water ingress
- Dry, clean or replace the master switch and repair any damaged wiring
- Clear the code, carry out the window position relearn if the vehicle requires it, and test every window from both switches