VSA DTC 86-17 (2014 2015)

DTC 86-17  : F-CAN Communication With ACC Unit Malfunction

NOTE: 

• Troubleshoot any PGM-FI DTCs first - Refer to:

  How to Troubleshoot the Fuel and Emissions Systems (2014-20) .

• 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. 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. Start the engine and let it idle for at least 5 seconds.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   86-11 F-CAN Bus-Off Malfunction
   86-17 F-CAN Communication With ACC Unit Malfunction

   Is DTC 86-17 indicated?

   YES 

   If only DTC 86-17 is indicated, go to step 2.

   YES 

   If DTC 86-11 is also indicated, go to DTC 86-11 - Refer to:

   VSA DTC 86-11 (2014 2015) 

   VSA DTC 86-11, 86-51  or

   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. Disconnect the following connectors.

   VSA modulator-control unit 38P connector

   ACC unit 20P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 38P connector: disconnected
   	ACC unit 20P connector: disconnected
   Test circuit	F-CAN_L
   Test point 1	VSA modulator-control unit 38P connector No. 26 (BLK)
   Test point 2	ACC unit 20P connector No. 13 (BLK)

   Test circuit	F-CAN_H
   Test point 1	VSA modulator-control unit 38P connector No. 38 (WHT)
   Test point 2	ACC unit 20P connector No. 2 (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 ACC unit and the VSA modulator-control unit.

3. ACC unit check (update or substitution)

   - 1. Reconnect the following connectors.

   VSA modulator-control unit 38P connector

   ACC unit 20P connector

   - 2. Update the ACC unit if it does not have the latest software,

   or substitute a known-good ACC unit. .

   - 3. Turn the vehicle to the ON mode.

   - 4. Clear the DTC with the HDS.

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

   - 6. Start the engine and let it idle for at least 5 seconds.

   - 7. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   86-17 F-CAN Communication With ACC Unit Malfunction

   Is DTC 86-17 indicated?

   YES 

   Go to step 4.

   NO 

   If the ACC unit was updated, troubleshooting is complete. If the ACC unit was substituted, replace the original ACC unit .

4. 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. Start the engine and let it idle for at least 5 seconds.

   - 4. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame

   Is DTC 86-17 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.