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 turn the ignition switch to LOCK (0) before completion, the SH-AWD system can be damaged.

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

2. 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.