DTC 56-11 (2016 2017 2018)

DTC 56-11  : Fail-Safe Relay Power Source Malfunction

NOTE: Before you troubleshoot, review the general troubleshooting information .

DTCs (VSA)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Turn the vehicle to the ON mode, then wait for at least 10 seconds or more.

   -5. Turn the vehicle to the OFF (LOCK) mode, then wait for at least 10 seconds or more.

   -6. Turn the vehicle to the ON mode.

   -7. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   56-11 Fail-Safe Relay Power Source Malfunction

   Is DTC 56-11 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting .

2. Determine possible failure area (+B ABS/VSA FSR line)

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

   -2. Disconnect the following connector.

   VSA modulator-control unit 21P connector

   -3. Turn the vehicle to the ON mode.

   -4. Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.

   -5. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	VSA modulator-control unit 21P connector: disconnected
   Test point 1	VSA modulator-control unit 21P connector No. 3
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Go to step 4.

   NO 

   Go to step 3.

3. Fuse check

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

   -2. Check the following fuse.

   Fuse	No. D5 (30 A)
   Location	Auxiliary under-dash fuse box A

   Is the fuse OK?

   YES 

   The fuse is OK. Reinstall the fuse. Repair an open in the +B ABS/VSA FSR wire between the No. D5 (30 A) fuse in the auxiliary under-dash fuse box A and the VSA modulator-control unit.

   NO 

   Replace the fuse. Turn the vehicle to the ON mode, then to the OFF (LOCK) mode. If the fuse blows again, repair the short to ground on the No. D5 (30 A) fuse circuit.

4. Determine possible failure area (IG1 VSA/EPS line)

   -1. Turn the vehicle to the ON mode.

   -2. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	VSA modulator-control unit 21P connector: disconnected
   Test point 1	VSA modulator-control unit 21P connector No. 6
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Go to step 5.

   NO 

   Go to step 6.

5. Shorted wire check (IG1 VSA/EPS line to power)

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

   -2. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 21P connector: disconnected
   Test point 1	VSA modulator-control unit 21P connector No. 6
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Repair a short to power in the IG1 VSA/EPS wire between the VSA modulator-control unit and the under-dash fuse/relay box.

   NO 

   Go to step 7.

6. Fuse check

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

   -2. Check the following fuse.

   Fuse	No. C27 (7.5 A)
   Location	Under-dash fuse/relay box

   Is the fuse OK?

   YES 

   The fuse is OK. Reinstall the fuse. Repair an open in the IG1 VSA/EPS wire between the No. C27 (7.5 A) fuse in the under-dash fuse/relay box and the VSA modulator-control unit.

   NO 

   Replace the fuse. Turn the vehicle to the ON mode, then to the OFF (LOCK) mode. If the fuse blows again, repair the short to ground on the No. C27 (7.5 A) fuse circuit.

7. VSA modulator-control unit check (update)

   -1. Reconnect the following connector.

   VSA modulator-control unit 21P connector

   -2. Update the VSA modulator-control unit if it does not have the latest software .

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Turn the vehicle to the OFF (LOCK) mode, then wait for at least 10 seconds or more.

   -5. Turn the vehicle to the ON mode.

   -6. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame

   Is DTC 56-11 indicated?

   YES 

   Check for loose terminals 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.