What does it mean?
B2195 is a Body (airbags, seat belts, body electronics) fault code. It indicates: DTC Detection Logic (Chain of ECM-IMMU) . This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.
Symptoms
- Driver window will not move at all, or moves slowly and stops
- Window fuse blowing repeatedly, or the thermal protection cutting in after one attempt
- Burning smell or a hot connector at the door module
- Express up and down and anti pinch functions lost
- Engine cranks but will not start, with the security lamp on, when the immobiliser link is the problem
- Window position needs relearning after any repair
Likely causes
- Window motor with shorted internal windings drawing excessive current
- Window regulator jammed, iced up or off its track, so the motor stalls and overloads
- Loom pinched inside the door boot and shorting a motor feed to ground
- Water inside the door module or the master switch after a blocked drain or a torn vapour barrier
- Master switch with internal contamination shorting an output
- Communication line between the engine control unit and the immobiliser open, shorted or corroded
- Engine control unit or immobiliser replaced without carrying out the matching procedure
- Poor ground shared by the door module and the window motor
How to fix it
- Confirm the manufacturer definition for this vehicle, the two meanings are unrelated
- Disconnect the window motor and measure both motor circuits to ground, a short with the motor unplugged is a harness fault
- Operate the regulator by hand with the motor unplugged and check it moves freely through its whole travel
- Measure the motor current draw with a clamp meter and compare with specification
- Inspect the door boot loom, the door module connector and the vapour barrier for pinch damage and water
- For the immobiliser variant, check continuity of the link between the engine control unit and the immobiliser, then carry out the matching procedure
- Replace the motor or regulator if the mechanism binds or the motor draws excessive current
- Clear the code, perform the window position relearn and verify express and anti pinch operation