DTC C1851-19: Control Module Internal Control Module Malfunction (2013-18)

DTC (AWD)

1. Problem verification (with engine idling):

   Press the engine start/stop button to select the ON mode.

   - 2. Clear the DTC with the HDS.

   Clear DTC

   - 3. Start the engine.

   - 4. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   C1851-19 Control Module Internal Control Module Malfunction

   Is DTC C1851-19 indicated?

   YES 

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

   NO 

   Go to step 2.

2. Problem verification (with rear differential pump motor running):

   Clear the DTC with the HDS.

   Clear DTC

   - 2. Select ADJUSTMENT in the AWD WITH INTELLIGENT CONTROL with the HDS.

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

   Air Bleeding

   - 4. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   C1851-19 Control Module Internal Control Module Malfunction

   Is DTC C1851-19 indicated?

   YES 

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

   NO 

   Intermittent failure, the system is OK at this time.