DTC Troubleshooting: B1075

DTC B1075: Headlight Signal Error

1. Clear the DTCs using the HDS.

1. Turn the headlights switch from the OFF position to the ON position.

1. Check the DTCs by selecting the DTCs MENU (DTCs) from the HDS.

Is DTC B1075 indicated?

YES | - | Go to Step 4 .
NO | - | Intermittent failure, the headlight circuit is OK at this time.■

1. With the headlight switch OFF, select the TEST MODE MENU from the HDS, and enter the DATA LIST.

1. Check the ON/OFF information of the HEADLIGHT BACKUP in the DATA LIST.

Is the information indicator OFF?

YES | - | Go to Step 6 .
NO | - | Go to Step 9 .

1. Turn the headlight switch ON.

1. Check the ON/OFF information of the HEADLIGHT BACKUP in the DATA LIST.

Is the information indicator ON?

YES | - | Troubleshoot DTC B1278.■
NO | - | Go to Step 8 .

1. Check for continuity between the No. 6 terminal of the relay module 10P connector and the No. 1 terminal of the wiper/washer switch (LHD type) or combination light switch (RHD type) (combination switch control unit) 8P connector.

Is there continuity?

YES | - | Faulty combination switch control unit; replace the wiper/washer switch (LHD type) or combination light switch (RHD type).■
NO | - | Repair an open in the WHT wire.■

1. Check for continuity between the No.6 terminal of the relay module 10P connector and body ground.

Is there continuity?

YES | - | Repair a short in the WHT wire.■
NO | - | Faulty combination switch control unit; replace the wiper/washer switch (LHD type) or combination light switch (RHD type).■