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DTC Troubleshooting: B1280

DTC B1280:
 Turn Signal Switch Circuit Malfunction
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch to LOCK (0) and then back to ON (II).
  1. Operate the turn signal switch in left and right positions.
  1. 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.■
  1. Select LIGHTING from the BODY ELECTRICAL system select menu, then enter the DATE LIST.
  1. Check each combination light switch position value with the DATA LIST menu.

    When the turn signal switch is in left position:

    Data List
    Value
    Turn Signal Switch (LEFT)
    ON
    Turn Signal Switch (RIGHT)
    OFF


    When the turn signal switch is in right position:

    Data List
    Value
    Turn Signal Switch (LEFT)
    OFF
    Turn Signal Switch (RIGHT)
    ON

Are all data list values correct?
YES -
NO -
Go to Step 7 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the combination light switch 12P connector.
  1. Turn the ignition switch to ON (II).
  1. Select the BODY ELECTRICAL system select menu, then enter the LIGHTING SYSTEM.
  1. Check each combination light switch position value with the DATA LIST menu.

    When the turn signal switch is in neutral position:

    Data List
    Value
    Turn Signal Switch (LEFT)
    OFF
    Turn Signal Switch (RIGHT)
    OFF

Are both data list values indicated OFF?
YES -
Go to Step 15 .
NO -
Go to Step 12 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect under-dash fuse/relay box connector M (34P).
  1. Check for continuity between under-dash fuse/relay box connector M (34P) No. 2 and No. 6 terminals and body ground individually.
Is there continuity?
YES -
Repair a short to ground in the wire.■
NO -
  1. Turn the ignition switch to LOCK (0).
Is the combination light switch OK?
YES -
Go to Step 17 .
NO -
Replace the combination light switch.■
  1. Disconnect under-dash fuse/relay box connector M (34P).

  1. Check for continuity between under-dash fuse/relay box connector M (34P) No. 2, No. 6, and No. 33 terminals and the combination light switch 12P connector No. 5 [No. 2], No. 6 [No. 1], and No. 7 [No. 12] terminals.
    [ ]: LHD model
Is there continuity?
YES -
NO -
Repair an open in the wire.■
RHD model
LHD model