Code No. P10AD: Oil pump drive circuit fails




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. 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 power supply terminal and body earth.
OK: System battery

Q. Is the check result normal?

Go to Step 3.

Check the power supply circuit and repair if necessary. Then go to Step 8.

STEP 3. 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 OPMP terminal and body earth.
OK: System battery

Q. Is the check result normal?

Go to Step 5.

Go to Step 4.

STEP 4. 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 6.

Repair the harness. Then go to Step 8.

STEP 5. 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 OPMP terminal is in good condition.
OK: OPMP waveform: 10%

Q. Is the check result normal?

Go to Step 8.

Go to Step 6.

STEP 6. 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 electric oil pump. (Refer to GROUP 14B - EV Cooling System .) Then go to Step 8.

Go to Step 7.

STEP 7. 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 8.

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

STEP 8. 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.