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

2. Make sure the HDS communicates with vehicle and the SH-AWD control unit. If it doesn't, troubleshoot the DLC circuit. Testing and Inspection

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 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 8.






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

Is there continuity?
YES - Repair 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






7. 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 open in the wire between left solenoid 4P connector terminals No. 3 and No. 4.










8. Disconnect the left solenoid 4P connector.

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

Is there continuity?
YES - Repair 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