Code No. P0562: Battery voltage (low voltage)


HIGH VOLTAGE POWER SUPPLY CONTROL SYSTEM








OPERATION



DIAGNOSIS CODE SET CONDITIONS



  • When the control power supply voltage of 9 V or less continues or when it is 7 V or less, the diagnosis code No. P0562 will be set.
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
  • Loose auxiliary battery terminal
  • Damaged wiring harness or connector(s)
  • Malfunction of the DC-DC converter
  • Malfunction of the EV-ECU

DIAGNOSIS PROCEDURE

STEP 1. ?Check whether the diagnosis code is set.
Check if the diagnosis code No. P0A09 is set to the EV-ECU.

Q. Is the diagnosis code set?
Carry out troubleshooting for the diagnosis code P0A09. (Refer to .)
Go to Step 2.

STEP 2. Auxiliary battery check
Refer to GROUP 54A - Battery Test (). In addition, check the auxiliary battery terminal for looseness.

Q. Is the check result normal?
Go to Step 3.
Charge the auxiliary battery. (Refer to GROUP 54A - Charge .) Or, replace the auxiliary battery. (Refer to GROUP 54A - Battery Removal and Installation .)

STEP 3. Connector check: E-01 on board charger/DC-DC converter connecter, fusible link (No. 26)

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

STEP 4. Check the wiring harness between E-01 on board charger/DC-DC converter connector terminal No. 1 and the fusible link (No. 26).
Check the power supply line for open circuit.

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

STEP 5. Voltage measurement at A-08X EV control relay (relay box) connecter
(1)Disconnect the A-08X EV control relay, 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 A-08X EV-ECU connector terminal No. 4 and the body earth.
OK: Battery voltage

Q. Is the check result normal?
Go to Step 8.
Go to Step 6.

STEP 6. Connector check: A-08X EV control relay (relay box) connecter

Q. Is the check result normal?
Go to Step 7.
Correct or replace the relay box.

STEP 7. Check the wiring harness between A-08X EV control relay (relay box) connector terminal No. 4 and the relay box fuse (No. 7).
Check the power supply line for open circuit.

Q. Is the check result normal?
Go to Step 8.
Repair the wiring harness.

STEP 8. EV control relay check
Check the EV control relay. (Refer to .)

Q. Is the check result normal?
Go to Step 9.
Replace the EV control relay.

STEP 9. Connector check: C-111 EV-ECU, A-08X EV control relay (relay box) connecter

Q. Is the check result normal?
Go to Step 10.
Repair the damaged connector. Or, correct or replace the relay box.

STEP 10. Check the wiring harness between A-08X EV control relay (relay box) connector terminal No. 1 and C-111 EV-ECU connector terminal No. 120.
Check the power supply line for open circuit.

Q. Is the check result normal?
Go to Step 11.
Repair the wiring harness.

STEP 11. M.U.T.-III actuator test and service data
Perform the actuator test (refer to ), and check the service data of the EV control relay (refer to ).
Actuator test
  • Item No. 2 : 12 V DC DC shutdown
Data list
  • Item No. 83 : Control power supply voltage
OK: The voltage value varies between 3.7 V and 3.9 V / 3.3 V and 3.5 V depending on activation / deactivation of the DC-DC converter.

Q. Is the check result normal?
Go to Step 12.
Carry out the troubleshooting for the EV-ECU diagnosis code P0A09. (Refer to .)

STEP 12. Diagnosis code recheck
Check again if the diagnosis code 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.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?
Replace the EV-ECU. (Refer to .) Then go to Step 13.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)

STEP 13. Diagnosis code recheck
Check again if the diagnosis code 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.
(3)Check if the diagnosis code is set.

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