DTC 111-12

DTC 111-12  : Back-Up Light Switch Stuck ON

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• If DTC 86-11 is indicated at the same time, do the DTC 86-11 troubleshooting first .

DTCs (VSA)

1. Back-up lights check

   -1. Turn the vehicle to the ON mode.

   -2. Check the back-up lights when the shift lever is in neutral.

   Are the back-up lights off?

   YES 

   Go to step 5.

   NO 

   Go to step 2.

2. Back-up light switch check 1

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Back-up light switch 4P connector

   -3. Turn the vehicle to the ON mode.

   -4. Shift the shift lever into neutral.

   Are the back-up lights off?

   YES 

   Go to step 4.

   NO 

   Go to step 3.

3. MICU check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Under-dash fuse/relay box connector Q (40P)

   -3. Turn the vehicle to the ON mode.

   -4. Shift the shift lever into neutral.

   Are the back-up lights off?

   YES 

   Repair a short to power in the BACK LT- wire between the back-up light switch and the under-dash fuse/relay box.

   NO 

   Replace the MICU.

4. Back-up light switch check 2

   -1. Check the back-up light switch .

   Is the back-up light switch OK?

   YES 

   Check the reverse shift mechanism in the transmission.

   NO 

   Replace the back-up light switch .

5. Back-up light switch performance check

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

   Signal	Current conditions
   	Values	Unit
   BACK-UP LIGHT SWITCH

   Does it indicate ON when the shift lever is in reverse, and OFF when the shift lever is in neutral?

   YES 

   Go to step 7.

   NO 

   Go to step 6.

6. Body electrical system DTC check

   -1. Check for gauge control module DTCs with the HDS.

   DTC Description	DTC

   Are any DTCs indicated?

   YES 

   Go to indicated DTC's troubleshooting.

   NO 

   Replace the MICU.

7. VSA modulator-control unit check

   -1. Clear the DTC with the HDS.

   -2. Turn the vehicle to the OFF (LOCK) mode.

   -3. Test-drive the vehicle.

   NOTE:  Drive the vehicle on the road, not on a lift.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   111-12 Back-Up Light Switch Stuck ON

   Is DTC 111-12 indicated?

   YES 

   Go to step 8.

   NO 

   Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting . If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.

8. VSA modulator-control unit check (update)

   -1. Update the VSA modulator-control unit if it does not have the latest software .

   -2. Turn the vehicle to the OFF (LOCK) mode.

   -3. Test-drive the vehicle.

   NOTE:  Drive the vehicle on the road, not on a lift.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame

   Is DTC 111-12 indicated?

   YES 

   Check for loose terminals and poor connections in the VSA modulator-control unit 21P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit .

   NO 

   Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.