DTC C1860-98

DTC C1860-98  : Differential Fluid Overheats

NOTE: 

• Before you troubleshoot, review the General Troubleshooting Information .
• When the clutch is presumed to be overheated, DTC C1860-98 is set and the system turns off the clutch engagement to protect the clutch. This DTC may also set under the following conditions.
• • -

    When spinning the rear wheels while the vehicle is stuck in sand, mud, snow, etc

  • -

    When the VSA system is OFF

• If other DTCs are stored at the same time as DTC C1860-98 and/or DTC C1861-9A, troubleshoot other DTCs first, then recheck for DTC C1860-98 and/or DTC C1861-9A.

DTC (Real Time AWD)

1. DTC check

   -1. Turn the vehicle to the ON mode.

   -2. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame

   Is DTC C1860-98, C1861-9A, or other DTC indicated?

   DTC C1860-98 or C1861-9A is indicated

   Go to step 2.

   Other DTC is indicated

   Go to the indicated DTC's troubleshooting.

2. Tire size check

   -1. Check the tire size of the four wheels.

   Are all tire sizes same?

   YES 

   The tire sizes are OK. Go to step 3.

   NO 

   Replace the tire with the standard size .

3. Brake drag check

   -1. Check for brake drag.

   Are the brakes OK?

   YES 

   The brakes are OK. Go to step 4.

   NO 

   Repair the front/rear hydraulic brake system or the parking brake system.

4. Rear differential fluid temperature sensor check

   -1. Check the parameter(s) below with the HDS.

   Signal	Current conditions
   	Values	Unit
   Oil temperature for rear differential

   -2. Measure the actual temperature of the rear differential fluid, then compare it with the HDS value checked in step 4

   Are the values almost the same?

   YES 

   The rear differential fluid temperature sensor is OK. Go to step 5.

   NO 

   Replace the rear differential fluid temperature sensor .

5. Rear differential fluid pressure sensor test

   -1. Do the rear differential fluid pressure sensor test .

   Is the test result OK?

   YES 

   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.

   NO 

   Do the repair depending on the test result .