Code No. P0562: Battery voltage (low voltage)


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



note
  • If the vehicle is left with the electric motor switch set to ACC or ON or the vehicle is not used for a long time, the diagnosis code may be set.

PROBABLE CAUSES



  • Malfunction of the auxiliary battery
  • Damaged wiring harness or connector(s)
  • Malfunction of the DC-DC converter
  • Malfunction of the MCU

DIAGNOSIS PROCEDURE

STEP 1. Use M.U.T.-III to confirm a diagnosis code of other systems.
Check if the diagnosis code is set to the EV-ECU.

Q. Is the diagnosis code set?
Carry out troubleshooting for the EV-ECU. (Refer to .) Then go to Step 2.
Go to Step 2.

STEP 2. Measure the voltage at E-06 MCU connector.
(1)Disconnect the E-06 MCU connector, and measure the voltage at the wiring harness side.
(2)Turn the electric motor switch to the "ON" position.
(3)Measure the voltage between the E-06 MCU connector No.5 - the body earth.
OK: Battery voltage

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)
Go to Step 3.

STEP 3. Connector check: E-06 MCU connector, C-112 joint connector

Q. Is the check result normal?
Go to Step 4.
Repair the damaged connector.

STEP 4. Check the wiring harness between E-06 MCU connector terminal No. 5 and C-112 joint connector terminal No. 7.
Check the power supply line for open circuit.

Q. Is the check result normal?
Go to Step 5.
Repair the wiring harness.

STEP 5. 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 6.
The diagnosis is complete.

STEP 6. 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.