78-xx

SH-AWD DTC Troubleshooting: 78-xx (x can be 0 thru 9 or A thru F)

DTC 78-xx ("x" can be 0 thru 9 or A thru F): SH-AWD Control Unit Self-Diagnostic Malfunction

NOTE: Before you troubleshoot, review the general troubleshooting information. Initial Inspection and Diagnostic Overview

1. Clear the DTC with the HDS.

2. Make sure the HDS communicates with vehicle and the SH-AWD control unit. If it doesn't, troubleshoot the DLC circuit. Testing and Inspection

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

4. Check for DTCs with the HDS.

Is DTC 78-xx 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 - Intermittent failure, the system is OK at this time.