Code No. P1B0E: Motor coil U phase temperature sensor fails (short to power supply, short circuit)
Code No. P1B0F: Motor coil U phase temperature sensor fails (short to earth, open circuit)
Code No. P1B12: Motor coil W phase temperature sensor fails (short to power supply, short circuit)
Code No. P1B13: Motor coil W phase temperature sensor fails (short to earth, open circuit)




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnosis


Q. Is the check result normal?

Go to Step 2.

Repair the CAN bus line.

STEP 2. Use M.U.T.-III to confirm a diagnosis code of other systems.


Check whether the PHEV-ECU stores a diagnosis code.

Q. Is diagnosis code stored?

Diagnose the system according to the stored diagnosis code.

Go to Step 3.

STEP 3. Power drive unit connector, front motor connector check


Visually check them for damage or water ingress.

Q. Is the check result normal?

Go to Step 4.

Replace the connector.

STEP 4. Check the resistance in the coil temperature sensor.


(1)Disconnect the power drive unit and the front motor connectors.
(2)Measure the resistance in the coil temperature sensor (U and W phases) between the front motor connector terminals.
Terminal code
Normal value
TH1 - TH1G (U phase)

    Approx. 400kΩ - 600kΩ at -20°C
    Approx. 140kΩ - 200kΩ at 0°C
    Approx. 55kΩ - 70kΩ at 20°C
    Approx. 23kΩ - 30kΩ at 40°C

TH2 - TH2G (W phase)

Q. Is the check result normal?

Go to Step 6.

Go to Step 5.

STEP 5. Check the U-phase or W-phase wire between the power drive unit connector and the front motor (electric motor unit) connector for short to power supply, short circuit, short to earth, or open circuit.


Q. Is the check result normal?

Go to Step 6.

Replace the harness.

STEP 6. Service data check


Drive the vehicle to check the service data below: (Refer to .)

Q. Is the check result normal?

Go to Step 7.

Replace the front motor. (Refer to .) Then go to Step 8.

STEP 7. Check whether the diagnosis code is stored again.


Check whether the FEMCU stores a diagnosis code again.
(1)Erase the stored diagnosis code.
(2)Power supply mode of electric motor switch: OFF
(3)Power supply mode of electric motor switch: ON
(4)Power supply mode of electric motor switch: OFF
(5)Power supply mode of electric motor switch: ON
(6)Drive the vehicle.
(7)Check if the diagnosis code is stored.

Q. Is diagnosis code stored?

Replace the power drive unit. (Refer to .) Then go to Step 8.

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).

STEP 8. Check whether the diagnosis code is stored again.


Check whether the FEMCU stores a diagnosis code again.
(1)Erase the stored diagnosis code.
(2)Power supply mode of electric motor switch: OFF
(3)Power supply mode of electric motor switch: ON
(4)Power supply mode of electric motor switch: OFF
(5)Power supply mode of electric motor switch: ON
(6)Drive the vehicle.
(7)Check if the diagnosis code is stored.

Q. Is diagnosis code stored?

Return to Step 1.

This diagnosis is complete.