86-21

VSA DTC Troubleshooting: 86-11, 86-21, 86-22, 86-23, 86-24, 86-25, 86-41

DTC 86-11:

F-CAN Communication With ECM/PCM Malfunction

DTC 86-21:

F-CAN Communication With Engine Malfunction

DTC 86-22:

F-CAN Communication With Engine Malfunction

DTC 86-23:

F-CAN Communication With Engine Malfunction

DTC 86-24:

F-CAN Communication With Engine Malfunction

DTC 86-25:

F-CAN Communication With Engine Malfunction

DTC 86-41:

F-CAN Communication With EAT Malfunction

NOTE: Troubleshoot the fuel and emissions DTCs first.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Test-drive the vehicle. Drive the vehicle at 7 mph(10 km/h) or more.

NOTE: Drive the vehicle on a straight section of road, not on a lift.

4. Check for DTCs with the HDS.

Is DTC 86-11, 86-21, 86-22, 86-23, 86-24, 86-25, or 86-41 indicated?

YES -

If the DTC 86-01 is indicated at the same time, do the DTC 86-01 troubleshooting VSA System. If the DTC 86-01 is not indicated, go to step 5.

NO -

If any other DTCs are indicated, go to the indicated DTCs troubleshooting. If DTCs are not indicated, intermittent failure, the system is OK at this time. Check for loose terminals between ECM/PCM connector A (49P) and the VSA modulator-control unit 36P connector. Refer to intermittent failures troubleshooting.�

5. Turn the ignition switch to LOCK (0).

6. Short the SCS line with the HDS.

7. Disconnect ECM/PCM connector A (49P).

8. Disconnect the VSA modulator-control unit 36P connector.

9. Check for continuity between the VSA modulator-control unit 36P connector terminal and ECM/PCM connector A (49P) terminal (see table).









Is there continuity?

YES -

Go to step 10.

NO -

Repair an open in the wire between the ECM/PCM and the VSA modulator-control unit.�

10. Reconnect all connectors.

11. Update the ECM/PCM if it does not have the latest software ECM/PCM Update (A/T), or substitute a known-good ECM/PCM.

12. Clear the DTC with the HDS.

13. Test-drive the vehicle. Drive the vehicle at 7 mph (10 km/h) or more.

NOTE: Drive the vehicle on a straight section of road, not on a lift.

14. Check for DTCs with the HDS.

Is DTC 86-11, 86-21, 86-22, 86-23, 86-24, 86-25, or 86-41 indicated?

YES -

Go to step 15.

NO -

If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM Service and Repair.�

15. Update the VSA modulator-control unit if it does not have the latest software Testing and Inspection. If the already has the latest software, substitute a known-good VSA modulator-control unit Service and Repair.

16. Test-drive the vehicle. Drive the vehicle at 7 mph (10 km/h) or more.

NOTE: Drive the vehicle on a straight section of road, not on a lift.

17. Check for DTCs with the HDS.

Is DTC 86-11, 86-21, 86-22, 86-23, 86-24, 86-25, or 86-41 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 36P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit Service and Repair, then retest. If the VSA modulator-control unit was substituted, go to step 1.

NO -

If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit Service and Repair. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.�