B2126

DTC B2126: Steering Angle Sensor Z Pulse Line or Supply Line Open

NOTE: Before troubleshooting, check the VSA system DTCs. If the VSA system is OK, do this troubleshooting.

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Turn the headlight switch ON.
4. Turn the steering wheel 10 degrees or more to the left or right, and keep it in that position.
5. Check for DTCs with the HDS.

Is DTC B2126 indicated?

YES - Go to step 6.

NO - Intermittent failure, the adaptive front lighting system is OK at this time. Check for loose or poor connections at the steering angle sensor connector and at the adaptive front lighting control unit connector.

6. Check the steering angle sensor.

Is the steering angle sensor OK?

YES - Go to step 7.

NO - Faulty steering angle sensor, replace it.

7. Turn the ignition switch OFF.
8. Remove the driver's dashboard undercover, and the driver's dashboard lower cover, then remove the steering column covers.
9. Disconnect the steering angle sensor 5P connector.
10. Disconnect the adaptive front lighting control unit 40P connector.
11. Check for continuity between steering angle sensor 5P connector terminal No. 3 and adaptive front lighting control unit 40P connector terminal No. 17.






Is the continuity?

YES - Faulty adaptive front lighting control unit, replace it and do the adaptive front lighting control unit learning procedure.

NO - Repair an open in the wire.