81-1

SH AWD DTC Troubleshooting: 81-1

DTC 81-1:

Left Search Coil Sensor Malfunction

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

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

2. Disconnect SH-AWD control unit connector A (20P).

3. Check for continuity between SH-AWD control unit connector terminals A1 and A11.





Is there continuity?

YES -

Go to step 4.

NO -

Go to step 7.

4. Check the REAR DIFFERENTIAL FLUID TEMPERATURE in the DATA LIST is above 68 °F (20 °C) with the HDS before proceeding to the next step. If the temperature is below 68 °F (20 °C), drive the vehicle to warm up the rear differential until the fluid temperature becomes above 68 °F (20 °C).

5. Measure the resistance between SH-AWD control unit connector terminals A1 and A11.





Is there 2.0 Ohms or more?

YES -

Go to step 6.

NO -

Go to step 10.

6. Check for continuity between SH-AWD control unit connector terminal A1 and body ground.





Is there continuity?

YES -

Repair a short to body ground in the wire between SH-AWD control unit connector terminal A1 and body ground.�

NO -

Check for loose connector terminals at the SH-AWD control unit and repair if necessary. 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.�

NOTE: If a new SH-AWD control unit was used in place of a known-good control unit and the new control unit will not initialize, replace the rear differential left side case Rear Differential Side Case Replacement.

7. Disconnect the left solenoid 4P connector.

8. Connect SH-AWD control unit connector terminals A1 and A11 with a jumper wire.






9. Check for continuity between left solenoid 4P connector terminals No. 3 and No. 4.





Is there continuity?

YES -

Replace the rear differential left side case Rear Differential Side Case Replacement.�

NO -

Repair an open in the wire between left solenoid 4P connector terminals No. 3 and No. 4.�

10. Disconnect the left solenoid 4P connector.

11. Check for continuity between left solenoid 4P connector terminals No. 3 and No. 4.





Is there continuity?

YES -

Repair a short in the wires between SH-AWD control unit connector A and the left solenoid 4P connector.�

NO -

Replace the rear differential left side case Rear Differential Side Case Replacement.�