DTC 44-50
DTC 44-50: SH-AWD Control Unit Power Supply Voltage Low1. Make sure the battery is fully changed and the charging system is working properly.
2. Turn the ignition switch OFF.
3. Check these fuse:
^ No. 22 (70 A) fuse in the under-hood fuse/relay box.
^ No. 1 (30 A) fuse in the passenger's under dash fuse/relay box.
Are the fuses OK?
YES - Go to step 4.
NO - Repair short to ground in the wire between the fuse and the SH-AWD relay, then replace the fuse and recheck.
4. Clear the DTC with the HDS.
5. Start the engine.
6. Check for DTCs with the HDS.
Is DTC 44-50 indicated?
YES - Go to step 7.
NO - Intermittent failure, the system is OK at this time.
7. Turn the ignition switch OFF.
8. Test the SH-AWD relay.
Is the SH-AWD relay OK?
YES - Go to step 9.
NO - Replace the SH-AWD relay.
9. Disconnect SH-AWD control unit connector A (26P) and connector B (8P).
10. Check for continuity between SH-AWD control unit connector terminal B1 and SH-AWD relay 4P connector terminal No. 1.
Is there continuity?
YES - Go to step 11.
NO - Repair open in the wire between SH-AWD control unit connector A and the SH-AWD relay connector.
11. Check for continuity between SH-AWD control unit connector terminal A3 and SH-AWD relay 4P connector terminal No. 3.
Is there continuity?
YES - Go to step 12.
NO - Repair open in the wire between SH-AWD control unit connector A and the SH-AWD relay connector.
12. Check for continuity between SH-AWD relay 4P connector terminal No. 4 and body ground.
Is there continuity?
YES - Go to step 13.
NO - Repair open in the wire between the SH-AWD relay and body ground.
13. Measure voltage between SH-AWD relay 4P connector terminal No. 2 and body ground.
Is there battery voltage?
YES - Check for loose connector terminals at the SH-AWD control unit. If the connections are OK, substitute a known-good SH-AWD control unit and recheck.
NO - Repair open in the wire between the No. 1 fuse in the passenger's under-hood fuse/relay box and the SH-AWD relay.