B2137
DTC B2137: Right Adaptive Front lighting Gearbox Motor Signal Error1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Turn the headlight switch ON.
4. Select the BODY ELECTRICAL menu from the HDS.
5. Select the AFS from the HDS, then enter the TEST MODE MENU.
6. Select the FUNCTION TEST, then select the ADAPTIVE FRONT LIGHTING.
7. Select the HEADLIGHT-LEFT/RIGHT and the HEADLIGHT-UP/DOWN with the HDS, and move the adaptive front lighting gearbox motor.
8. Check for the DTC with the HDS.
Is DTC B2137 indicated?
YES - Go to step 9.
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.
9. Turn the ignition switch OFF.
10. Test the left adaptive front lighting gearbox.
Is the right adaptive front lighting gearbox OK?
YES - Go to step 11.
NO - Replace the left adaptive front lighting gearbox.
11. Disconnect the adaptive front lighting control unit 40P connector.
12. Disconnect the left adaptive front lighting gearbox 8P connector.
13. Check for continuity between body ground and right adaptive front lighting gearbox 8P connector terminals No. 3, No. 4, No. 7, and No. 8 individually.
Is there continuity?
YES - Repair a short in the wire.
NO - Faulty adaptive front lighting control unit, replace it and do the adaptive front lighting learning procedure.