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DTC U1910: Received error from MCU (K-line)
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
 
 
DTC SET CONDITIONS
The PHEV-ECU sets DTC U1910 when it cannot communicate with the power drive unit via K lines correctly.
 
 
 
PROBABLE CAUSES
  • Malfunction of the FEMCU.
  • Malfunction of the PHEV-ECU.
  • Noise interruption in bus wires.
 
 
 
 
DIAGNOSIS
STEP 1. Check the signal line for open circuit and short to ground circuit (PHEV-ECU and the FEMCU).
Check the wiring harness between brake PHEV-ECU connector (terminal KLN1) and the FEMCU connector (terminal KLN1).
Is the check result normal?
Go to Step 2.
Repair the connector or wiring harness.
 
STEP 2. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
Check if DTC U1900 is set in the PHEV-ECU.
Is the DTC set?
Carry out troubleshooting for the DTC U1900 (Refer to ).
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
Check whether the DTC U1910 is set in the power drive unit (FEMCU) [Refer to GROUP 54C- CAN Communication-related DTC (U-code) Table ].
Is the DTC set?
Troubleshoot for the relevant DTC.
Go to Step 4.
 
STEP 4. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Recheck the DTC.
(1) Erase the DTC.
(2) Turn off the power supply mode of the electric motor switch.
(3) Turn on the power supply mode of the electric motor switch.
(4) Check the DTC.
Is the DTC set?
Replace the power drive unit (FEMCU) (Refer to GROUP 54Db - Power Drive Unit Removal and Installation ). Then go to Step 5.
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
 
STEP 5. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Recheck the DTC.
(1) Erase the DTC.
(2) Turn off the power supply mode of the electric motor switch.
(3) Turn on the power supply mode of the electric motor switch.
(4) Check the DTC.
Is the DTC set?
Replace the PHEV-ECU (Refer to ).
The procedure is complete.