77-4

SH-AWD DTC Troubleshooting: 77-4

DTC 77-4: The Functional Abnormalities of Automatic Transmission

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

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Clear the DTC with the HDS.

3. Start the engine.

4. Check for DTCs with the HDS.

Is DTC 77-4 indicated?
YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time.


5. Check for DTCs in the A/T system with the HDS.

Are there any A/T system DTCs indicated?
YES - Go to the indicated DTC's troubleshooting.

NO - 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