Code No. P1AFD: Quick charging voltage



caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be stored. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.

TROUBLE JUDGEMENT


The PHEV-ECU stores diagnosis code No. P1AFD when the quick charging voltage is abnormal.

PROBABLE CAUSES



  • Malfunction of quick charging contactor drive relay P or N
  • Malfunction of quick charging contactor
  • Damaged harness or connector
  • Malfunction of quick charging cable
  • Malfunction of quick charger
  • Malfunction of PHEV-ECU

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics


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 lines (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 2.

STEP 2. Check whether the diagnosis code is stored again.


Recheck if the diagnosis code is stored.
(1)Erase the diagnosis code.
(2)Turn on the power supply mode of the electric motor switch.
(3)Check if the diagnosis code is stored.

Q. Is the diagnosis code stored?

Go to Step 3.
The procedure is complete.

STEP 3. M.U.T.-III data list


Check that the following data list display contents are normal (Refer to ).
Data list
  • Item 262: Quick charger function
Check condition
Normal condition
The on-board charger cannot be used or identified.
NG
The on-board charger can be used.
OK

Q. Is the check result normal?

Go to Step 17.
Go to Step 4.

STEP 4. Is another diagnosis code related to the quick charging stored?


Q. Is the check result normal?

Go to Step 5.
Troubleshoot for the relevant diagnosis code. Then go to Step 5.

STEP 5. Check quick charging contactor drive relay P or N


Quick charging contactor drive relay P and N is checked (Refer to ).

Q. Is the check result normal?

Go to Step 6.
Replace the quick charging contactor drive relay P or N.

STEP 6. Check the power supply line for open and short circuit (IGCT relay and quick charging contactor drive relay P or N connector).


Check the followings.

  • Check the wiring harness IGCT relay and quick charging contactor drive relay P terminal No.2.

  • Check the wiring harness IGCT relay and quick charging contactor drive relay N terminal No.2.

Q. Is the check result normal?

Go to Step 7.
Repair the connector or wiring harness.

STEP 7. Check the signal line for open and short circuit (Quick charging contactor drive relay P or N and connector PHEV-ECU connector).


Check the followings.

  • Check the wiring harness quick charging contactor drive relay P terminal No.1 and PHEV-ECU connector (DFR+ terminal) connector.

  • Check the wiring harness quick charging contactor drive relay P terminal No.1 and PHEV-ECU connector (DFR- terminal) connector.

Q. Is the check result normal?

Go to Step 8.
Repair the connector or wiring harness.

STEP 8. Check the continuity between the quick charging connector terminal No. 4 and the PHEV-ECU connector (S2 terminal).


Q. Is the check result normal?

Go to Step 16.
Go to Step 9.

STEP 9. Voltage measurement at the drive battery connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Voltage between drive battery terminal No.2, 3 and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 11.
Go to Step 10.

STEP 10. Check the power supply for open and short circuit (Quick charger connector and quick charging contactor drive relay P or N).



  • Check the wiring harness quick charger connector terminal No.4 and quick charging contactor drive relay P and N terminal No.3.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
Repair the connector or wiring harness.

STEP 11. Resistance measurement at the PHEV-ECU connector.


(1)Measure by backprobing without disconnecting the connector.
(2)PHEV-ECU (S2 terminal) connector and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 13.
Go to Step 12.

STEP 12. Check the power supply line for open and short circuit (Drive battery and PHEV-ECU).



  • Check the wiring harness drive battery connector terminal No.1 and PHEV-ECU (S2 terminal) connector terminal.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
Repair the connector or wiring harness.

STEP 13. Service plug switch check


Refer to .

Q. Is the check result normal?

Go to Step 16.
Go to Step 14.

STEP 14. Resistance check (Quick charging contactor, main contactor)


Refer to .

Q. Is the check result normal?

Go to Step 15.
Replace the quick charging contactor or main contactor.

STEP 15. Check the power supply line for open and short circuit (Quick charger and drive battery).



  • Check the wiring harness quick charger connector terminal No.2, 1 and drive battery H-07, H-04 connector terminal No.1.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
Repair the connector or wiring harness.

STEP 16. Quick charging cable check


Check whether the drive battery is connected with the EV charger cable securely (Refer to ).

Q. Is the check result normal?

Check the quick charger. Then go to Step 17.
Tighten the drive battery to the quick charging cable with a torque of 7.0 ± 2.0 N·m.

STEP 17. Check whether the diagnosis code is stored again.


Recheck if the diagnosis code is stored.
(1)Erase the diagnosis code.
(2)Turn on the power supply mode of the electric motor switch.
(3)Check if the diagnosis code is stored.

Q. Is the diagnosis code stored?

Replace the PHEV-ECU (Refer to ).
The procedure is complete.