44-50

SH AWD DTC Troubleshooting: 44-50

DTC 44-50:

SH-AWD Control Unit Power Supply Voltage Low

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

1. Make sure the battery is fully changed and the charging system is working properly.

2. Turn the ignition switch to LOCK (0).

3. Check the No. 2 (SVTM-4) (30 A) fuse in the main under-hood fuse box.

Is the fuse OK?

YES -

Go to step 4.

NO -

Replace the blown fuse and recheck. If the No. 2 (30 A) fuse blows again, repair a short to ground in the wire between the fuse in the main under-hood fuse box and the SH-AWD relay 4P connector, then replace the fuse and recheck.�

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

5. Clear the DTC with the HDS.

6. Start the engine.

7. Check for DTCs with the HDS.

Is DTC 44-50 indicated?

YES -

Go to step 8.

NO -

Intermittent failure, the system is OK at this time.�

8. Turn the ignition switch to LOCK (0).

9. Remove the SH-AWD relay Service and Repair, then test the SH-AWD relay Power Relay Test.�

Is the SH-AWD relay OK?

YES -

Go to step 10.

NO -

Replace the SH-AWD relay Service and Repair.�

10. Measure the voltage between SH-AWD relay 4P connector terminal No. 1 and body ground.





Is there battery voltage?

YES -

Go to step 11.

NO -

Repair an open in the wire between the No.1 fuse in the main under-hood fuse box and the SH-AWD relay.�

11. Disconnect SH-AWD control unit connector A (20P) and connector B (8P).

12. Check for continuity between SH-AWD control unit connector terminal B1 and SH-AWD relay 4P connector terminal No. 2.





Is there continuity?

YES -

Go to step 13.

NO -

Repair an open in the wire between SH-AWD control unit connector B and the SH-AWD relay connector.�

13. Check for continuity between SH-AWD control unit connector terminal A17 and SH-AWD relay 4P connector terminal No. 4.





Is there continuity?

YES -

Go to step 14.

NO -

Repair an open in the wire between SH-AWD control unit connector A and the SH-AWD relay connector.�

14. Check for continuity between SH-AWD relay 4P connector terminal No. 3 and body ground.





Is there continuity?

YES -

Go to step 15.

NO -

Repair an open in the wire between the SH-AWD relay and body ground.�

15. Check for continuity between SH-AWD relay 4P connector terminals No. 2 and No. 4 to body ground (G501).





Is there continuity?

YES -

Repair a short in the wire between the SH-AWD relay and body ground.�

NO -

Check for loose connector terminals at the SH-AWD control unit. If the connections are OK, 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.�