Code No. P0A43: Motor resolver open/short circuit


caution
  • Even when the vehicle is normal, a diagnosis code might be set depending on the service status. Therefore, check the interview information before the diagnosis.
ELECTRIC MOTOR UNIT CONTROL SYSTEM CIRCUIT



DIAGNOSIS CODE SET CONDITIONS



PROBABLE CAUSES



  • Malfunction of the resolver circuit system
  • Malfunction of the motor (electric motor unit)
  • Malfunction of the MCU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: E-07 MCU, motor (electric motor unit) connector check

Q. Is the check result normal?
YES : Go to Step 2.
Repair the damaged connector.

STEP 2. Measure the resistance of the resolver.
(1)Disconnect the E-07 MCU, motor (electric motor unit) connector.
(2)Measure the resolver resistance between the E-07 motor (electric motor unit) connector terminals.

RESISTANCE VALUE AT ROOM TEMPERATURE OF 25°C
Terminal No.
 Normal value
6 - 13
 31 to 41 Ω
5 - 12
 79 to 97 Ω
4 - 11
 72 to 88 Ω

Q. Is the check result normal?
Go to Step 3.
Replace the motor (electric motor unit) (). Then go to Step 3.

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)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)Check if the diagnosis code is set.

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