DTC C1852-19 (62-04): Solenoid Valve Circuit High Current

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

DTC (Real Time AWD)

1. Problem verification (with engine idling)

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

   - 2. Clear the DTC with the HDS.

   - 3. Start the engine.

   - 4. 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)

   - 1. Select the ADJUSTMENT in the REAL TIME AWD with the HDS.

   - 2. With the engine running, do the AIR BLEEDING in the ADJUSTMENT with the HDS.

   Air Bleeding

   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 (DUTY1 line)

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

   - 2. Disconnect the following connectors.

   Rear differential solenoid valve 1P connector

   Real time AWD control unit 24P connector

   - 3. Check for continuity between test points 1 and 2.

   Is there continuity?

   YES 

   Repair a short to ground in the DUTY1 wire between the rear differential solenoid valve and the real time AWD control unit.

   NO 

   The DUTY1 wire is OK. Go to step 4.

4. 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 speeds 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
   	Real time AWD control unit 24P connector: disconnected
   Test point 1	Rear differential solenoid valve 1P connector No. 1
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there about 10 Ω or more?

   YES 

   Update the real time AWD control unit if it does not have the latest software , or substitute a known-good real time AWD control unit , and recheck. If the symptom/indication goes away with the updated real time AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good real time AWD control unit, replace the original real time AWD control unit .

   NO 

   Replace the rear differential solenoid valve.