VSA DTC 86-11 (2014 2015)

DTC 86-11  : F-CAN Bus-Off Malfunction

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

How to Troubleshoot the VSA System (2014 2015 2016)

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 a few seconds or more.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   86-11 F-CAN Bus-Off Malfunction

   Is DTC 86-11 indicated?

   YES 

   The failure is duplicated. Go to step2.

   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)

   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. Open wire check (F-CAN_L, F-CAN_H lines)

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

   - 2. Short the SCS line with the HDS.

   - 3. Disconnect the following connectors.

   VSA modulator-control unit 38P connector

   PCM connector A (51P) - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2014-20)

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

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 38P connector: disconnected
   	PCM connector A (51P): disconnected
   Test circuit	F-CAN_L
   Test point 1	VSA modulator-control unit 38P connector No. 26 (BLK)
   Test point 2	PCM connector A (51P) No. 10 (BLK)

   Test circuit	F-CAN_H
   Test point 1	VSA modulator-control unit 38P connector No. 38 (WHT)
   Test point 2	PCM connector A (51P) No. 9 (WHT)

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

   Is there continuity?

   YES 

   The F-CAN_L and F-CAN_H wires are OK. Go to step 3.

   NO 

   Repair an open in the wire between the PCM and the VSA modulator-control unit.

3. VSA modulator-control unit check (update)

   - 1. Reconnect the following connectors.

   VSA modulator-control unit 38P connector

   PCM connector A (51P) - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2014-20)

   - 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 a few seconds or more.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame

   Is DTC 86-11 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.