DTC 43-1: Differential Fluid Temperature Sensor Circuit Malfunction
WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Before you troubleshoot, review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION
).
- Turn the ignition switch to ON (II).
- Check for DTCs with the HDS.
Is DTC 42-1 or 42-2 indicated?
YES -Go to the indicated DTC'S TROUBLESHOOTING .
NO -Go to step 3.
- Clear the DTC with the HDS.
- Start the engine.
- Let the engine idle 1 minute.
- Test-drive the vehicle for 5 minutes.
- Check for DTCs with the HDS.
Is DTC 43-1 indicated?
YES -Go to step 8.
NO -Intermittent failure, the system is OK at this time.
- Turn the ignition switch to LOCK (0).
- Disconnect SH-AWD control unit connector A (20P).
- Disconnect the rear differential fluid temperature sensor 2P connector.
- Check for continuity between rear differential fluid temperature sensor 2P connector terminals No. 1 and No. 2.Fig 1: Checking Continuity Between Rear Differential Fluid Temperature Sensor 2P Connector Terminals No. 1 And No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Repair a short in the wires between rear differential fluid temperature sensor 2P connector terminals No. 1 and No. 2.
NO -Go to step 12.
- Reconnect all connectors.
- Update the SH-AWD control unit if it does not have the latest software (see SH-AWD® CONTROL UNIT UPDATE ), or substitute a known-good SH-AWD control unit (see SH-AWD® CONTROL UNIT REPLACEMENT ).
- Start the engine.
- Let the engine idle 1 minute.
- Check for DTCs with the HDS.
Is DTC 43-1 indicated?
YES -Replace the rear differential fluid temperature sensor (see REAR DIFFERENTIAL FLUID TEMPERATURE SENSOR REPLACEMENT ).
NO -Replace the original SH-AWD control unit (see SH-AWD® CONTROL UNIT REPLACEMENT ).