B1280

Control System DTCs

DTC Troubleshooting: B1280

DTC B1280 : Turn Signal Switch Circuit Malfunction

1. Turn signal/hazard warning lights system check 1:

-1. Check the parameter(s) below with the HDS.





Do the current condition(s) match the threshold?
-YES- Go to step 2.
-NO- Go to step 4.

2. 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.





Do the current condition(s) match the threshold?
-YES- Go to step 3.
-NO- Intermittent failure, the system is OK at this time.

3. Shorted wire check (R TURN SW to L TURN SW line):

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.





-3. Connect terminals A and B with a jumper wire.









-4. Check the parameter(s) below with the HDS.





Do the current condition(s) match the threshold?
-YES- The R TURN SW to L TURN SW wire is OK. Replace the combination light switch Service and Repair.
-NO- Repair a short between the wires.

4. Turn signal/hazard warning lights system check 2:

-1. Check the parameter(s) below with the HDS.





Do the current condition(s) match the threshold?
-YES- Go to step 6.
-NO- Go to step 5.

5. Shorted wire check (R TURN SW line):

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.





-3. Check the parameter(s) below with the HDS.





Do the current condition(s) match the threshold?
-YES- Repair a short to ground in the wire.
-NO- The R TURN SW wire is OK. Replace the combination light switch Service and Repair.

6. Shorted wire check (L TURN SW line):

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.





-3. Check the parameter(s) below with the HDS.





Do the current condition(s) match the threshold?
-YES- Repair a short to ground in the wire.
-NO- The L TURN SW wire is OK. Replace the combination light switch Service and Repair.