Code No. P10AE: Oil pump circuit, open circuit




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


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


Q. Is the check result normal?

Go to Step 2.

Repair the CAN bus line.

STEP 2. Use M.U.T.-III to confirm a diagnosis code of other systems.


Check whether the PHEV-ECU stores a power supply-related diagnosis code(s).

Q. Is the check result normal?

Go to Step 3.

Diagnose the system according to the stored diagnosis code.

STEP 3. Check the OPMP circuit wires between the oil pump and the power drive unit for short to earth or open circuit.


Q. Is the check result normal?

Go to Step 4.

Repair the harness. Then go to Step 11.

STEP 4. Measure the voltage at the oil pump connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Operate the electric motor switch without depressing the brake pedal and turn ON the power supply mode of electric motor switch. (READY indicator does not illuminate)
(3)Measure the voltage between the OPCP terminal and body earth.
OK: Battery voltage

Q. Is the check result normal?

Go to Step 6.

Go to Step 5.

STEP 5. Check the OPCP circuit wires between the oil pump and the power drive unit for short to earth or open circuit.


Q. Is the check result normal?

Go to Step 6.

Repair the harness. Then go to Step 11.

STEP 6. Check the wire between the oil pump connector and body earth for open circuit.


Q. Is the check result normal?

Go to Step 7.

Repair the harness. Then go to Step 11.

STEP 7. Check the OPCP circuit wires between the oil pump and the power drive unit for short to earth or open circuit.


Q. Is the check result normal?

Go to Step 8.

Repair the harness. Then go to Step 11.

STEP 8. Inspection using an oscilloscope


(1)Operate the electric motor switch without depressing the brake pedal and turn ON the power supply mode of electric motor switch. (READY indicator does not illuminate)
(2)Check whether the OPCP and OPMP terminals are in good condition.
OK:

  • OPCP waveform: 20%
  • OPMP waveform: 10%

Q. Is the check result normal?

Go to Step 11.

NO (OPCP waveform fails) : Go to Step 9.

NO (OPMP waveform fails) : Go to Step 10.

STEP 9. Check whether the diagnosis code is stored again.


Check whether the generator control unit stores a diagnosis code again.
(1)Erase the stored diagnosis code.
(2)Power supply mode of electric motor switch: OFF
(3)Power supply mode of electric motor switch: ON
(4)Drive the vehicle.
(5)Check if the diagnosis code is stored.

Q. Is diagnosis code stored?

Replace the oil pump. (Refer to GROUP 14B - Electric oil pump, EV oil cooler bypass valve, EV motor and generator oil chamber .) Then go to Step 11.

This diagnosis is complete.

STEP 10. Check whether the diagnosis code is stored again.


Check whether the generator control unit stores a diagnosis code again.
(1)Erase the stored diagnosis code.
(2)Power supply mode of electric motor switch: OFF
(3)Power supply mode of electric motor switch: ON
(4)Drive the vehicle.
(5)Check if the diagnosis code is stored.

Q. Is diagnosis code stored?

Replace the power drive unit. (Refer to .) Then go to Step 11.

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).

STEP 11. Check whether the diagnosis code is stored again.


Check whether the generator control unit stores a diagnosis code again.
(1)Erase the stored diagnosis code.
(2)Power supply mode of electric motor switch: OFF
(3)Power supply mode of electric motor switch: ON
(4)Drive the vehicle.
(5)Check if the diagnosis code is stored.

Q. Is diagnosis code stored?

Return to Step 1.

This diagnosis is complete.