When servicing the high voltage system parts, always
shut off the high voltage by removing the service plug (refer to ).
When servicing the high voltage system parts, always wear the protective equipment
or armour to measure the high voltage (refer to ).
caution
If there is any problem in the CAN bus lines, an incorrect
diagnosis code may be set. Prior to this diagnosis, always diagnose the CAN bus lines.
OPERATION
The smooth condenser in the MCU is controlled by the EV-ECU, connects and
shuts down the high-voltage circuit via the main contactor (+) and (-) in
the main battery.
DIAGNOSIS CODE SET CONDITIONS
If a seizure of the main contactor (-) is determined
when the high-voltage circuit is activated, the diagnosis code No. P0AA4 will be set.
PROBABLE CAUSES
Damaged wiring harness or connector(s)
Malfunction of the main battery
Malfunction of the EV-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnosis
Use the M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 3.
Repair the CAN bus line. (Refer to GROUP 54C - Troubleshooting .)
Then go to Step 2.
STEP 2. Diagnosis code recheck after resetting CAN bus lines
Check again if the diagnosis code No. P0AA4 is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.
)
)
)
Go to Step 3.
Repair the CAN bus line. (Refer to GROUP 54C - Troubleshooting 
.)
Then go to Step 2.)
)
