77-1

SH-AWD DTC Troubleshooting: 77-1

DTC 77-1: The Functional Abnormalities of Fuel Emission

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

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

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. Clear the DTC with the HDS.

4. Start the engine.

5. Check for DTCs with the HDS.

Is DTC 77-1 indicated?
YES - Go to step 6.

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


6. Check for DTCs in the Fuel Emission with the HDS.

Are any Fuel Emission 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