Code No. P265B: Abnormal Hall Sensor Implanted Into Valve Lift Control Motor




Operation




FUNCTION




TROUBLE JUDGMENT


Check Condition
Judgement Criterion
  1. The system has detected an abnormal output pattern (all High or Low) in the U, V and W-phase position sensor signals.

FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Perform voltage measurement at valve lift control motor connector.



  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal valve lift ECU HS5V line and body earth.
OK: 4.9 - 5.1 V

Q. Is the check result normal?

Go to Step 4.
Go to Step 2.

STEP 2. Check harness between valve lift control motor connector terminal and valve lift ECU connector terminal HS5V.



  • Check power supply line for open/short circuit.

Q. Is the check result normal?

Go to Step 3.
Repair or replace the connector, or repair the damaged harness wire.

STEP 3. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is diagnosis code set?

Replace the valve lift ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 4. Check harness between valve lift control motor connector terminal and valve lift ECU connector terminal HS5V.



  • Check power supply line for damage.

Q. Is the check result normal?

Go to Step 5.
Repair or replace the connector, or repair the damaged harness wire.

STEP 5. Perform resistance measurement at valve lift control motor connector.



  • Disconnect connector, and measure at harness side.
  • Resistance between terminal valve lift ECU HSE line and body earth.
OK: Continuity (2 Ω or less)

Q. Is the check result normal?

Go to Step 7.
Go to Step 6.

STEP 6. Check harness between valve lift control motor connector terminal and valve lift ECU connector terminal HSE.



  • Check earthing line for open circuit and damage.

Q. Is the check result normal?

Go to Step 3.
Repair or replace the connector, or repair the damaged harness wire.

STEP 7. Check harness between valve lift control motor connector terminal and valve lift ECU connector terminal HSUS.



  • Check signal line for open circuit and damage.

Q. Is the check result normal?

Go to Step 8.
Repair or replace the connector, or repair the damaged harness wire.

STEP 8. Check harness between valve lift control motor connector terminal and valve lift ECU connector terminal HSVS.



  • Check signal line for open circuit and damage.

Q. Is the check result normal?

Go to Step 9.
Repair or replace the connector, or repair the damaged harness wire.

STEP 9. Check harness between valve lift control motor connector terminal and valve lift ECU connector terminal HSWS.



  • Check signal line for open circuit and damage.

Q. Is the check result normal?

Go to Step 10.
Repair or replace the connector, or repair the damaged harness wire.

STEP 10. Check harness between valve lift control motor connector terminal and body earth.



  • Check the shield line for open circuit and damage.

Q. Is the check result normal?

Go to Step 11.
Repair or replace the connector, or repair the damaged harness wire.

STEP 11. Replace the valve lift control motor.



  • After replacing the valve lift control motor, reconfirm whether the diagnosis code is set.

Q. Is the diagnosis code set?

Go to Step 12.
Check end.

STEP 12. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is diagnosis code set?

Replace the valve lift ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).