DTC B1280: Turn Signal Switch Circuit Malfunction
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0), and then back to ON (II).
- Operate the turn signal switch in left and right positions, and wait for at least 6 seconds.
- Check for DTCs with the HDS.
Is DTC B1280 indicated?
YES -Go to step 5.
NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections.
- Select LIGHTING from the BODY ELECTRICAL SYSTEM SELECT menu, then enter DATA LIST.
- Check each turn signal switch position value with the DATA LIST menu.
When the turn signal switch is in left position
TURN SIGNAL SWITCH POSITION VALUE CHARTData List Value Turn Signal Switch (LEFT) ON Turn Signal Switch (RIGHT) OFF When the turn signal switch is in right position
TURN SIGNAL SWITCH POSITION VALUE CHARTData List Value Turn Signal Switch (LEFT) OFF Turn Signal Switch (RIGHT) ON Are all data list values correct?
YES -Faulty driver's MICU; replace the driver's under-dash fuse/relay box, USA models (see DRIVER'S UNDER-DASH FUSE/RELAY BOX (MICU)REMOVAL AND INSTALLATION ), Canada models (see SPECIAL TOOLS REQUIRED ).
NO -Go to step 7.
- Turn the ignition switch to LOCK (0).
- Disconnect the combination light switch 12P connector.
- Disconnect driver's under-dash fuse/relay box connector R (24P).
- Check for continuity between body ground and driver's under-dash fuse/relay box connector R (24P) terminals No. 13 and No. 14 individually.
DRIVER'S UNDER-DASH FUSE/RELAY BOX CONNECTOR R (24P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Repair a short to ground in the wire.
NO -Go to step 11.
- Check for continuity between driver's under-dash fuse/relay box connector R (24P) terminals No. 13 and No. 14.
DRIVER'S UNDER-DASH FUSE/RELAY BOX CONNECTOR R (24P)
Is there continuity?
YES -Repair a short between the wires.
NO -Replace the combination light switch (see COMBINATION LIGHT SWITCH TEST/REPLACEMENT ).