DTC Troubleshooting: C1841-11 (42-02)
DTC C1841-11: Differential Fluid Temperature Sensor Circuit Low Voltage
NOTE: Before you troubleshoot, review the General Troubleshooting Information.

DTC Description
DTC
Freeze Frame
C1841-11 Differential Fluid Temperature Sensor Circuit Low Voltage
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
Voltage of the oil temperature sensor for rear differential
Less than 0.08
V
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
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.?
2.
Rear differential fluid temperature sensor check:

Rear differential fluid temperature sensor check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Rear differential fluid temperature sensor 2P connector

?3.
Turn the vehicle to the ON mode.

?4.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
Voltage of the oil temperature sensor for rear differential
About 5
V
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
     
NO
     
     
     
The rear differential fluid temperature sensor is OK. Go to step 3.
3.
Shorted wire check (TOH line):

Shorted wire check (TOH line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
AWD control unit 24P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Rear differential fluid temperature sensor 2P connector: disconnected
 
AWD control unit 24P connector: disconnected
Test point 1
Rear differential fluid temperature sensor 2P connector (female terminals) No. 1:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to ground or the TOL wire in the TOH wire between the rear differential fluid temperature sensor and the AWD control unit.?
     
NO
     
     
     
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good AWD control unit, and recheck. If the symptom/indication goes away with a known-good AWD control unit, replace the original AWD control unit.?