91-1

SH AWD DTC Troubleshooting: 91-1

DTC 91-1:

SH-AWD Control Unit Programming Error

NOTE:

- Before you troubleshoot, review the general troubleshooting information Initial Inspection and Diagnostic Overview.
- DTC 91-1 is stored when the SH-AWD system update is not completed.
- Do not turn the ignition switch to LOCK (0) while updating the SH-AWD system. If you do, the SH-AWD system can be damaged.

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

2. Do the SH-AWD system update procedure SH-AWD Control Unit Update.

3. Check for DTCs with the HDS.

Is DTC 91-1 indicated?

YES -

Update the SH-AWD control unit if it does not have the latest software SH-AWD Control Unit Update, or substitute a known-good SH-AWD control unit Service and Repair, and recheck. If the symptom/indication goes away with the updated SH-AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good SH-AWD control unit, replace the original SH-AWD control unit Service and Repair.�

NO -

Update is complete.�