DTC Troubleshooting: 86-01

DTC 86-01:  F-CAN Bus-off Malfunction

1.Turn the ignition switch ON (II).

2.Clear the DTC with the HDS.

3.Turn the ignition switch OFF, then turn it ON (II) again.

4.Check for DTCs with the HDS.

Is DTC 86-01 indicated?


YES - Go to 5.


NO - Intermittent failure, the system is OK at this time. Check for loose terminals between the ECM/PCM connector A (44P), the gauge control module (tach) connector (36P) and the ABS modulator-control unit 25P connector. Refer to intermittent failures troubleshooting.n


5.Turn the ignition switch OFF.

6.Short the SCS line with the HDS.

7.Disconnect ECM/PCM connector A (44P).

8.Disconnect the ABS modulator-control unit 25P connector.

9.Check for continuity between the ABS modulator-control unit 25P connector terminal No. 1, No. 17 and body ground individually.

 

Is there continuity?


YES - Repair the short to ground in the appropriate wire.n


NO - Go to 10.

10.Check for continuity between ABS modulator-control unit 25P connector terminals No. 1 and No. 17.

 

Is there continuity?


YES - Repair short in the wire between ABS modulator-control unit 25P connector terminals No. 1 (CAN-H line) and No. 17 (CAN-L line).n


NO - Go to 11.

11.Check for continuity between ABS modulator-control unit 25P connector terminal and ECM/PCM connector A (44P) terminal (see table).

Sign Connector Terminal No. 
ABS Modulator-control Unit ECM/PCM 
CAN-L 17 37 
CAN-H 36 

 

Is there continuity?


YES - Check for loose terminals in the ABS modulator-control unit 25P connector. If necessary, substitute a known-good ABS modulator-control unit and retest: Except K20Z2 engine model, K20Z2 engine model.n


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