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

• 1. Turn the ignition switch to ON (II).
• 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

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

DTC C1841-11 is indicated Go to DTC C1841-11 TROUBLESHOOTING .

DTC C1841-13 is indicated Go to DTC C1841-13 TROUBLESHOOTING .

DTC C1841-27 is indicated Go to step 2.

• 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.

• 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

• Turn the ignition switch to LOCK (0).
• Turn the ignition switch to ON (II).
• Check the parameter(s) below with the HDS then compare with the value checked in step  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 TOL wires between the rear differential fluid temperature sensor and the real time AWD control unit, and recheck.

NO  : REPLACE THE REAR DIFFERENTIAL FLUID TEMPERATURE SENSOR .