VSA DTC Troubleshooting: 86-11
DTC 86-11: F-CAN Bus-Off Malfunction
NOTE:

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

1.
Problem verification:

Problem verification
?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Turn the ignition switch to LOCK (0), then turn it to ON (II) again, or select the OFF mode, then 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):

Open wire check (F CAN-L, F CAN-H lines)
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Short the SCS line with the HDS.


?3.
Disconnect the following connectors.

?4.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0) or OFF mode
 
VSA modulator-control unit 21P connector: disconnected
 
PCM connector A (51P): disconnected
Test circuit
F CAN-L
Test point 1
VSA modulator-control unit 21P connector No. 15 (RED)
Test point 2
L4 engine: PCM connector A (51P) No. 1 (RED)
V6 engine: PCM connector A (51P) No. 10 (RED)

Test circuit
F CAN-H
Test point 1
VSA modulator-control unit 21P connector No. 8 (WHT)
Test point 2
L4 engine: PCM connector A (51P) No. 2 (WHT)
V6 engine: PCM connector A (51P) No. 9 (WHT)
L4 engine

V6 engine


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):

VSA modulator-control unit check (update)
?1.
Reconnect the following connectors.

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

?3.
Turn the ignition switch to LOCK (0), then turn it to ON (II) again, or select the OFF mode, then 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.?