Code No. P0ABA: Motor drive voltage sensor error (MCU)


ELECTRIC MOTOR UNIT CONTROL SYSTEM CIRCUIT



DIAGNOSIS CODE SET CONDITIONS



PROBABLE CAUSES



  • Damaged high-voltage harness wires
  • Malfunction of the MCU (smooth condenser voltage sensor)

DIAGNOSIS PROCEDURE

STEP 1. High-voltage connector check: G-05, G-06 MCU high-voltage terminal, G-18, G-19 main battery high-voltage terminal
danger Carry out the check on the high-voltage circuit while reading carefully the precautions on handling a high-voltage vehicle. (Refer to .)
danger Wear the specified protection equipment during the check.
(1)Shut down the high voltage.
(2)Check that the following terminals are tightened to the specified torque. (Refer to , .)

  • G-05, G-06 MCU high-voltage terminal
  • G-18, G-19 main battery high-voltage terminal

Q. Is the check result normal?
Go to Step 2.
Tighten the high-voltage terminal to the specified torque. Refer to , .)

STEP 2. G-05, G-06 MCU to G-18, G-19 main battery high-voltage harness check
danger Carry out the check on the high-voltage circuit while reading carefully the precautions on handling a high-voltage vehicle. (Refer to .)
danger Wear the specified protection equipment during the check.
(1)Shut down the high voltage.
(2)Visual check between the G-05, G-06 MCU high-voltage terminal and G-18, G-19 main battery high-voltage terminal

Q. Is the check result normal?
Go to Step 3.
Replace the high-voltage harness.

STEP 3. Diagnosis code recheck
Check again if the diagnosis code is set to the MCU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.
(3)Set the electric motor switch to the "START" position, and start the electric motor unit.
(4)Check if the diagnosis code is set.

Q. Is the diagnosis code set?
Replace the MCU.(Refer to .) Then go to Step 4.
The diagnosis is complete.

STEP 4. Diagnosis code recheck
Check again if the diagnosis code is set to the MCU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.
(3)Set the electric motor switch to the "START" position, and start the electric motor unit.
(4)Check if the diagnosis code is set.

Q. Is the diagnosis code set?
Go to Step 1.
The diagnosis is complete.