VSA DTC 51-12, 51-80, 52-11

DTC 51-12  : Motor Drive Circuit Malfunction

DTC 51-80  : Motor Malfunction

DTC 52-11  : Motor Stuck OFF

NOTE:  Before you troubleshoot, review the how to troubleshoot the VSA system - Refer to:

How to Troubleshoot the VSA System (2014 2015 2016) or

How to Troubleshoot the VSA System (2017 2018 2019 2020) .

DTCs (VSA)

1. DTC check

   - 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 20 seconds or more.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   51-12 Motor Drive Circuit Malfunction
   51-80 Motor Malfunction
   52-11 Motor Stuck OFF
   53-11 Motor Relay Stuck ON

   Is DTC 51-12, 51-80, or 52-11 indicated?

   YES 

   If only DTC 51-12, 51-80, or 52-11 are indicated, go to step 2.

   YES 

   If DTC 53-11 is also indicated, go to DTC 53-11 .

   NO 

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

   How to Troubleshoot the VSA System (2014 2015 2016) or

   How to Troubleshoot the VSA System (2017 2018 2019 2020) .

   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.

2. Fuse check

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

   - 2. Check the following fuse.

   Fuse	No. B2-8 (40 A)
   Location	Main under-hood fuse box

   Is the fuse OK?

   YES 

   The fuse is OK. Reinstall the fuse, then go to step 5.

   NO 

   Go to step 3.

3. Shorted wire check (MTR+B line)

   - 1. Disconnect the following connector.

   VSA modulator-control unit 38P connector

   - 2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 38P connector: disconnected
   Test circuit	MTR+B
   Test point 1	VSA modulator-control unit 38P connector No. 2 (RED)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Repair a short to body ground in the wire between the No. B2-8 (40 A) fuse in the main under-hood fuse box and the VSA modulator-control unit.

   NO 

   The MTR+B wire is not shorted to body ground. Install a new No. B2-8 (40 A) fuse in the main under-hood fuse box, then go to step 4.

4. VSA modulator-control unit check

   - 1. Reconnect the following connector.

   VSA modulator-control unit 38P connector

   - 2. Turn the vehicle to the ON mode.

   - 3. Clear the DTC with the HDS.

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

   - 5. Turn the vehicle to the ON mode, then wait for at least 20 seconds or more.

   - 6. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   51-12 Motor Drive Circuit Malfunction
   51-80 Motor Malfunction
   52-11 Motor Stuck OFF

   Is DTC 51-12, 51-80, or 52-11 indicated?

   YES 

   Go to step 6.

   NO 

   Troubleshooting is complete.

5. Open wire check (MTR+B line)

   - 1. Disconnect the following connector.

   VSA modulator-control unit 38P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 38P connector: disconnected
   Test circuit	MTR+B

   Test point 1	VSA modulator-control unit 38P connector No. 2 (RED)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there battery voltage?

   YES 

   The MTR+B wire is OK. Go to step 6.

   NO 

   Repair an open in the wire between the No. B2-8 (40 A) fuse in the main under-hood fuse box and the VSA modulator-control unit.

6. VSA modulator-control unit check (update)

   - 1. Reconnect the following connector.

   VSA modulator-control unit 38P connector (if disconnected)

   - 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 ON mode, then wait for at least 20 seconds or more.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame

   Is DTC 51-12, 51-80, or 52-11 indicated?

   YES 

   Check for loose terminals in the VSA modulator-control unit 38P 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.