Code No. P264B: Valve Lift Sensor Poor Sensitivity




OPERATION




FUNCTION




TROUBLE JUDGMENT


Check Conditions
  1. P264C: Valve lift sensor circuit low input
  2. P264D: Valve lift sensor circuit high input
  3. P265B: Malfunction of valve lift control motor-integrated Hall sensor
Judgement Criteria
or

or

note Virtual control angle: The value which the valve lift ECU has calculated in accordance with the valve lift sensor output signal (the engine-ECU communicates via VLC-CAN).
note Actual control angle: The value calculated from the valve lift sensor output

FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Check whether the valve lift sensor is installed properly.


Q. Is the check result normal?

Go to Step 2.
Repair

STEP 2. Check harness between engine-ECU connector terminal VLS5 and valve lift sensor connector terminal.



  • Check power supply line for damage.

Q. Is the check result normal?

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

STEP 3. Check harness between engine-ECU connector terminal VLSE and valve lift sensor connector terminal.



  • Check earthing line for open circuit and damage.

Q. Is the check result normal?

Go to Step 4.
Repair or replace the connector, or repair the damaged harness wire.

STEP 4. Check harness between engine-ECU connector terminal VLS and valve lift sensor connector terminal.



  • Check output 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. Variable valve lift mechanism check



  • Variable valve lift mechanism check (Refer to GROUP 11C - On-vehicle Service - Variable valve lift mechanism check ).

Q. Is the check result normal?

Go to Step 6.
Repair

STEP 6. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is diagnosis code set?

Replace the engine-ECU.
Check end.