DTC B1280: Turn Signal Switch Circuit Malfunction
| DTC Description | DTC |
|---|---|
| B1280 Turn Signal Switch Circuit Malfunction |
DTC (MICU)
- Turn signal/hazard warning lights system check
-1. Check the parameter (s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit Turn Signal Switch (LEFT) OFF Turn Signal Switch (RIGHT) OFF Are both data list values indicated OFF?
YES
Go to step 2 below.
NO
Go to step 4
- Turn signal/hazard warning lights system check 2
-1. Operate the turn signal switch to the left or right position.
- 2. Check the parameter (s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit Turn Signal Switch (LEFT) ON Turn Signal Switch (RIGHT) ON Are both data list values indicated ON?
YES
Go to step 3 below.
NO
Intermittent failure, the system is OK at this time.
- Shorted wire check (R TURN SW to L TURN SW line)
-1. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
- 2. Disconnect the following connector.
Combination light switch 12P connector - 3. Connect terminals A and B with a jumper wire.
Terminal A Combination light switch 12P connector No. 10 (RED) Terminal B Body ground - 4. Check the parameter (s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit Turn Signal Switch (LEFT) OFF Signal Threshold Current conditions Values Unit Values Unit Turn Signal Switch (RIGHT) ON Are both data list values correct?
YES
The R TURN SW wire and the L TURN SW wire is not shorted. Replace the combination light switch .
NO
Repair a short between the wires.
- Shorted wire check (L TURN SW line or R TURN SW line)
-1. Check the parameter (s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit Turn Signal Switch (LEFT) ON Turn Signal Switch (RIGHT) OFF Is TURN SIGNAL SWITCH (LEFT) value ON?
YES
Go to step 5 below.
NO
Go to step 6
- Shorted wire check (L TURN SW line)
-1. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
- 2. Disconnect the following connector.
Combination light switch 12P connector - 3. Check the parameter (s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit Turn Signal Switch (LEFT) ON Is TURN SIGNAL SWITCH (LEFT) value ON?
YES
Repair a short to ground in the wire.
NO
The L TURN SW wire is OK. Replace the combination light switch .
- Shorted wire check (R TURN SW line)
-1. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
- 2. Disconnect the following connector.
Combination light switch 12P connector - 3. Check the parameter (s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit Turn Signal Switch (RIGHT) ON Is TURN SIGNAL SWITCH (RIGHT) value ON?
YES
Repair a short to ground in the wire.
NO
The R TURN SW wire is OK. Replace the combination light switch .