DTC Troubleshooting: C1852-19 (62-04)
DTC C1852-19: Solenoid Valve Circuit High Current
NOTE: Before you troubleshoot, review the General Troubleshooting Information.

DTC Description
DTC
Freeze Frame
C1852-19 Solenoid Valve Circuit High Current
    

1.
Problem verification (with engine idling):

Problem verification (with engine idling)
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Turn the vehicle to the OFF (LOCK) mode.

?4.
Start the engine.

?5.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
C1852-19 Solenoid Valve Circuit High Current
    

Is DTC C1852-19 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 3.
     
NO
     
     
     
Go to step 2.
2.
Problem verification (with rear differential pump motor running):

Problem verification (with rear differential pump motor running)
?1.
Clear the DTC with the HDS.


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

?3.
Turn the vehicle to the ON mode.

?4.
Select the ADJUSTMENT in the REAL TIME AWD with the HDS.

?5.
With the engine running, do the AIR BLEEDING in the ADJUSTMENT with the HDS.

  

?6.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
C1852-19 Solenoid Valve Circuit High Current
    

Is DTC C1852-19 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.
Shorted wire check (DTYH1 line):

Shorted wire check (DTYH1 line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
Rear differential solenoid valve 1P connector
AWD control unit 24P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Rear differential solenoid valve 1P connector: disconnected
 
AWD control unit 24P connector: disconnected
Test point 1
AWD control unit 24P connector No. 15
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Repair a short to ground in the DTYH1 wire between the rear differential solenoid valve and the AWD control unit.?
     
NO
     
     
     
The DTYH1 wire is OK. Go to step 4.
4.
Rear differential solenoid valve check:

Rear differential solenoid valve check
?1.
Turn the vehicle to the ON mode.

?2.
Check the parameter(s) below with the HDS.
NOTE: The rear differential fluid temperature should be 50 °F (10 °C) - 86 °F (30 °C). If the value is not within the enable temperature, warm up the rear differential fluid temperature by raising the vehicle on a lift and run the vehicle at 13 mph (20 km/h) for 5 seconds then slow down, and stop the wheels.

Signal
Current conditions
Values
Unit
Oil temperature for rear differential
    

?3.
Turn the vehicle to the OFF (LOCK) mode.

?4.
On the solenoid valve side, measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Rear differential solenoid valve 1P connector: disconnected
 
AWD control unit 24P connector: disconnected
Test point 1
Rear differential solenoid valve 1P connector (male terminals) No. 1:
Test point 2
Body ground


Is there about 10 ? or more?

     
YES
     
     
     
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.?
     
NO