DTC Troubleshooting: C1841-27 (43-01)
DTC C1841-27: Differential Fluid Temperature Sensor Circuit Range/Performance Problem
NOTE: Before you troubleshoot, review the General Troubleshooting Information.

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

1.
DTC check:

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
     
     
     
     
DTC C1841-13 is indicated
     
     
     
     
DTC C1841-27 is indicated
     
     
     
Go to step 2.
2.
Problem verification:

Problem verification
?1.
Clear the DTC with the HDS.


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

?3.
Start the engine, and let it idle for 1 minute.

?4.
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:

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 AWD control unit, and recheck.?
     
NO