DTC 86-11

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

NOTE: 

• Troubleshoot any PGM-FI DTCs first.
• Before you troubleshoot, review the general troubleshooting information .
• This DTC is stored by communication failure between the F-CAN line and the VSA modulator-control unit. When DTC 86-11 is indicated, the F-CAN line has already returned to normal. Check for loose terminals and poor connections in the connectors. If the connectors are OK, clear the DTC and follow this troubleshooting.

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, then to the ON mode.

   -4. 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 step 2.

   NO 

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

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.

   NOTE:  Always short the SCS line with the HDS before removing PCM connector(s).

   -3. Disconnect the following connectors.

   VSA modulator-control unit 21P connector

   PCM connector A (51P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 21P connector: disconnected
   	PCM connector A (51P): disconnected
   Test circuit 1
   Test point 1	VSA modulator-control unit 21P connector No. 15
   Test point 2	PCM connector A (51P) No. 4

   Test circuit 2
   Test point 1	VSA modulator-control unit 21P connector No. 8
   Test point 2	PCM connector A (51P) No. 3

   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 F-CAN_L and/or F-CAN_H wires 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 21P connector

   PCM connector A (51P)

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

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

   -4. 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 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.