DTC Troubleshooting: 86

DTC 86:  F-CAN Communication

1.Clear the DTC.

2.Turn the ignition switch OFF, then ON (II) again.

Is DTC 86 indicated?


YES - Go to 3.


NO - The system is OK at this time.n


3.Start and run the engine for at least 5 seconds then turn the engine off.

4.Check for DTCs by selecting the DTCs MENU (DTCs) from the HDS.

Is DTC 86 indicated?


YES - Go to 5.


NO - Intermittent failure; the F-CAN communication line is OK at this time.n


5.Turn the ignition switch OFF.

6.Disconnect the VSA control unit 47P connector and ECM/PCM 31P connector.

7.Turn the ignition switch ON (II).

8.Measure the voltage between body ground and the VSA control unit 47P connector terminal No. 11 and No. 15 individually.

 

Is there 1 V or more?


YES - Repair short to power in the wire between the VSA control unit and the ECM/PCM.n


NO - Go to 9.

9.Turn the ignition switch OFF.

10.Check for continuity between body ground and the VSA control unit 47P connector terminal No. 11 and No. 15 individually.

 

Is there continuity?


YES - Repair short to body ground in the wire between the VSA control unit and the ECM/PCM.n


NO - Go to 11.


11.Check for continuity between the VSA control unit 47P connector terminal No. 11 and ECM/PCM 31P connector terminal No. 11.

 

Is there continuity?


YES - Go to 12.


NO - Repair open in the wire between the VSA control unit and the ECM/PCM.n

12.Check for continuity between the VSA control unit 47P connector terminal No. 15 and ECM/PCM 31P connector terminal No. 24.

 

Is there continuity?


YES - Go to 13.


NO - Repair open in the wire between the VSA control unit and the ECM/PCM.n


13.Check for DTCs in the ECM/PCM.

Are any DTCs indicated?


YES - Troubleshoot the ECM/PCM DTCs.n


NO - Replace the VSA modulator-control unit.n