42-1

SH-AWD DTC Troubleshooting: 42-1

DTC 42-1: Differential Fluid Temperature Sensor (Short to Power)

NOTE:

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

- If the vehicle was driven prior to this troubleshooting procedure, allow the rear differential to cool for more than an hour before continuing.

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0), then turn the ignition switch back to ON (II), or select the OFF mode, then the ON mode.

4. Check for DTCs with the HDS.

Is DTC 42-1 indicated?
YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time.


5. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

6. Disconnect the rear differential fluid temperature sensor 2P connector.

7. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

8. Check the REAR DIFFERENTIAL FLUID TEMPERATURE SENSOR in the DATA LIST with the HDS.

Is there -28 °C or more?
YES - Go to step 9.

NO - Replace the rear differential fluid temperature sensor. Service and Repair


9. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

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

11. Check for continuity between rear differential fluid temperature sensor 2P connector terminals No. 1 and No. 2.

Is there continuity?
YES - Repair short in the wire between rear differential fluid temperature sensor 2P connector terminals No. 1 and No. 2.

NO - 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