DTC B1275: Headlight Switch OFF Position Circuit Malfunction DTC B1276: Headlight Switch Parking (SMALL) Position Circuit Malfunction DTC B1277: Headlight Switch AUTO Position Circuit Malfunction DTC B1278: Headlight Switch ON Position Circuit Malfunction Clear the DTCs using the HDS. Cycle the ignition switch to OFF, and then back ON. Check the DTCs by selecting the DTCs MENU (DTCs) from the HDS. Is DTC B1275, B1276, B1277 or B1278 indicated?
YES | - | Go to Step 4 .
NO | - | Intermittent failure, the headlight system is OK at this time.■
Reset the DTCs by CLEAR MENU (DTC CLEAR) of the HDS. Turn the ignition switch ON (II) and wait for 2 seconds. Turn the parking (small) light switch ON and wait for 2 seconds. Turn the headlight light switch (LOW) ON and wait for 2 seconds. Change the dimmer switch position from low beam to high beam and wait for 2 seconds. Check the DTCs by selecting the DTCs MENU (DTCs) from the HDS. Is DTC B1275, B1276, B1277, B1278 indicated?
YES | - | Go to Step 10 (LHD type) or faulty combination light switch control unit; replace the combination light switch (RHD type).
NO | - | Intermittent failure, the combination switch and the control unit are OK at this time.■
Disconnect the combination light switch 12P connector from the wiper/washer switch (LHD type) or combination light switch (RHD type). Perform the combination light switch test (LHD type). Is the continuity check OK?
YES | - | Faulty combination switch control unit, replace the wiper/washer switch (LHD type).■
NO | - | Replace the combination light switch (LHD type).■