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

- Make sure the battery is fully charged and the charging system is working properly.

1. Check the No. 2-6 (30 A) fuse in the under-hood fuse/relay box.

Is the fuse OK?
YES - Go to step 2.

NO - Replace the blown fuse and recheck. If the No. 2-6 (30 A) fuse blows again, repair short to ground in the wire between the No. 2-6 (30 A) fuse in the under-hood fuse/relay box and the SH-AWD relay 4P connector, then replace the fuse and recheck.


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

3. Clear the DTC with the HDS.

4. Start the engine.

5. Check for DTCs with the HDS.

Is DTC 44-50 indicated?
YES - Go to step 6.

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


6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

7. Remove the SH-AWD relay, Service and Repair then test the SH-AWD relay. Testing and Inspection

Is the SH-AWD relay OK?
YES - Go to step 8.

NO - Replace the SH-AWD relay. Service and Repair


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

Is there battery voltage?
YES - Go to step 9.

NO - Repair open in the wire between the No. 2-6 (30 A) fuse in the under-hood fuse/relay box and the SH-AWD relay 4P connector.






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

10. Connect SH-AWD relay 4P connector terminals No. 1 and No. 2 with a jumper wire.






11. Measure the voltage between SH-AWD control unit connector terminal B1 and body ground.

Is there voltage?
YES - Go to step 12.

NO - Repair open in the wire between SH-AWD control unit connector terminal B1 and the SH-AWD relay 4P connector.






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

Is there continuity?
YES - Go to step 13.

NO - Repair open in the wire between the SH-AWD relay 4P connector and body ground, or repair poor body ground at G652.






13. Connect SH-AWD relay 4P connector terminals No. 3 and No. 4 with a jumper wire.






14. Check for continuity between SH-AWD control unit connector terminal A17 and body ground.

Is there continuity?
YES - 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

NO - Repair open in the wire between SH-AWD control unit connector terminal A17 and the SH-AWD relay 4P connector.