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 9.

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





Is there continuity?

YES -

Repair a short 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 the known-good control unit and the new control unit will not initialize, replace the rear differential left side case.

7. Disconnect the left solenoid 4P connector.

8. Connect SH-AWD control unit connector terminals A1 and A11 with a jumper wire. Disconnect the left solenoid 4P connector, then 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.�

9. Disconnect the left solenoid 4P connector.

10. 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 search coil sensor connector.�

NO -

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