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), or press the engine start/stop button to select the OFF mode.

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 12.

4. Check the REAR DIFFERENTIAL FLUID TEMPERATURE SENSOR in the SH-AWD mode menu DATA LIST. The temperature should be 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 about 2.0 Ohms or more?

YES -

Go to step 8.

NO -

Go to step 6.

6. Disconnect the left solenoid 4P connector.

7. 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.�

8. 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 -

Go to step 9.

9. Check the connections at the SH-AWD control unit.

Are the connections loose or poor?

YES -

Repair the connections as needed, and recheck.

NO -

Go to step 10.

10. Update the SH-AWD control unit with the latest software SH-AWD Control Unit Update, and recheck.

Does the symptom/indication go away?

YES -

Troubleshooting is complete.�

NO -

Go to step 11.

11. Substitute the SH-AWD control unit with a known-good control unit, and recheck.

Does the symptom/indication go away?

YES -

Replace the original SH-AWD control unit Service and Repair.�

NO -

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

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

12. Disconnect the left solenoid 4P connector.

13. Connect left solenoid 4P connector terminal No. 3 to body ground with a jumper wire.






14. Check for continuity between SH-AWD control unit connector terminal A11 and body ground.





Is there continuity?

YES -

Go to step 15.

NO -

Repair an open in the wire between SH-AWD control unit connector terminal A11 and the left solenoid 4P connector.�

15. Remove the jumper wire from left solenoid 4P connector terminal No. 3.

16. Connect left solenoid 4P connector terminal No. 4 to body ground with a jumper wire.






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





Is there continuity?

YES -

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

NO -

Repair an open in the wire between SH-AWD control unit connector terminal A1 and the left solenoid 4P connector.�