Code No. P0A44: Motor speed fails




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 if the diagnosis code is stored in the PHEV-ECU.

Q. Is diagnosis code stored?

Diagnose the system according to the stored diagnosis code.

Go to Step 3.

STEP 3. 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: ON
(3)Power supply mode of electric motor switch: OFF
(4)Power supply mode of electric motor switch: ON
(5)Drive the vehicle.
(6)Check if the diagnosis code is stored.

Q. Is diagnosis code stored?

Replace the power drive unit. (Refer to .) Then go to Step 4.

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

STEP 4. 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: ON
(3)Power supply mode of electric motor switch: OFF
(4)Power supply mode of electric motor switch: ON
(5)Drive the vehicle.
(6)Check if the diagnosis code is stored.

Q. Is diagnosis code stored?

Return to Step 1.

This diagnosis is complete.