Code No.P10C1: On board charger start signal LO



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. P10C1 when the on-board charging start signal circuit fails (short to earth).

PROBABLE CAUSES



  • Damaged harness or connector
  • Malfunction of the on board charger/DC-DC converter
  • 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 9: Charge contactor (diag)
Check condition
Normal condition
When any of the conditions below is satisfied:

  • Immediately before the READY (ready to drive) indicator illuminates
  • Immediately before the charging indicator illuminates
ON
Other than above
OFF

  • Item 263: On-Board 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 14.
NO (Vehicles with MITSUBISHI remote control) : Go to Step 4.
NO (Vehicles without MITSUBISHI remote control) : Go to Step 5.

STEP 4. M.U.T.-III other system diagnosis code.



  • Use M.U.T.-III to check whether the EV remote ECU related diagnosis code is stored or not. (Refer to GROUP 54A - Diagnosis code chart ).

Q. Is the check result normal?

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

STEP 5. Resistance measurement at the on board charger/DC-DC converter connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Resistance between CGND terminal and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 7.
Go to Step 6.

STEP 6. Check the earth line for open circuit (On board charger/DC-DC converter and body earth).



  • Check the wiring harness on board charger/DC-DC converter (CGND terminal) connector and body earth.

Q. Is the check result normal?

Go to Step 9.
Repair the connector or wiring harness. Then go to Step 9.

STEP 7. Voltage measurement at the EV remote ECU connector or EV remote ECU empty connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Ignition switch: ON
(3)Measure the voltage between WUCO, WUCI terminals and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 10.
Go to Step 8.

STEP 8. Check the power supply line for open and short circuit (On board charger/DC-DC converter and EV remote ECU connector or EV remote ECU empty connector)



  • Check the wiring harness on board charger/DC-DC converter (CHOT, CHIN terminals) connector and EV remote ECU (WUCO, WUCI terminals) connector or EV remote ECU empty connector terminal No.14, 13.

Q. Is the check result normal?

Go to Step 9.
Repair the connector or wiring harness. Then go to Step 9.

STEP 9. 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 on board charger/DC-DC converter (Refer to ).
The procedure is complete.

STEP 10. Voltage measurement at the PHEV-ECU connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the voltage between CHGP terminal and body earth
OK: System voltage

Q. Is the check result normal?

Go to Step 12.
Go to Step 11.

STEP 11. Check the power supply line for open and short circuit (On board charger/DC-DC converter and PHEV-ECU)



  • Check the wiring harness on board charger/DC-DC converter (CHOT terminal) connector and PHEV-ECU (CHGP terminal) connector.

Q. Is the check result normal?

Replace the PHEV-ECU (Refer to ).
Repair the connector or wiring harness.

STEP 12. Resistance measurement at the on board charger/DC-DC converter connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Resistance between GND, GND2 terminals and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 14.
Go to Step 13.

STEP 13. Check the earth line for open circuit (PHEV-ECU and body earth).



  • Check the wiring harness PHEV-ECU (GND, GND2 terminals) connector and body earth.

Q. Is the check result normal?

Replace the PHEV-ECU (Refer to ).
Repair the connector or wiring harness.

STEP 14. 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 trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).