DTC C1841-27 (43-01): Differential Fluid Temperature Sensor Circuit Range/Performance Problem

NOTE:  Before you troubleshoot, Refer to: HOW TO TROUBLESHOOT THE REAL TIME AWD SYSTEM (AWD) .

DTC (Real Time AWD)

1. DTC check

   - 1. Turn the vehicle to the ON mode.

   - 2. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   C1841-11: Differential Fluid Temperature Sensor Circuit Low Voltage
   C1841-13: Differential Fluid Temperature Sensor Circuit High Voltage
   C1841-27: Differential Fluid Temperature Sensor Circuit Range/Performance Problem

   Is DTC C1841-11, C1841-13, or C1841-27 indicated?

   DTC C1841-11 is indicated

   Go to the DTC C1841-11 troubleshooting .

   DTC C1841-13 is indicated

   Go to the DTC C1841-13 troubleshooting .

   DTC C1841-27 is indicated

   Go to step 2.

2. Problem verification

   - 1. Clear the DTC with the HDS.

   - 2. Start the engine, and let it idle for 1 minute.

   - 3. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   C1841-27: Differential Fluid Temperature Sensor Circuit Range/Performance Problem

   Is DTC C1841-27 indicated?

   YES 

   The failure is duplicated. Go to step 3.

   NO 

   Intermittent failure, the system is OK at this time. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.

3. Rear differential fluid temperature sensor check

   - 1. Check the parameter(s) below with the HDS. Make note of this value as it will be needed in the following steps.

   Signal	Current Conditions
   	Values	Unit
   Voltage of the oil temperature sensor for rear differential

   - 2. Turn the vehicle to the OFF (LOCK) mode.

   - 3. Turn the vehicle to the ON mode.

   - 4. Check the parameter(s) below with the HDS then compare with the value checked in step 3- 1.

   Signal	Current Conditions
   	Values	Unit
   Voltage of the oil temperature sensor for rear differential

   Did the sensor value change?

   YES 

   Check for an intermittent open or short in the TOH and/or TOL wires between the rear differential fluid temperature sensor and the real time AWD control unit, and recheck.

   NO 

   REAR DIFFERENTIAL FLUID TEMPERATURE SENSOR REMOVAL & INSTALLATION(AWD) .