Code No. P264D: Valve Lift Sensor Circuit High Input

A power voltage of 5 V is applied to the valve lift sensor connector terminal from the engine-ECU connector terminal VLS5.
The power voltage is earthed to the engine-ECU connector terminal VLSE from the valve lift sensor connector terminal.
The sensor signal is inputted to the engine-ECU connector terminal VLS from the valve lift sensor output terminal.

The valve lift sensor converts valve lift amount to voltage signal, and then sends it to the engine-ECU.
The engine-ECU uses this signal to control the valve lift mount.

Check Conditions

After 2 seconds since the ignition switch is turned ON or since the completion of engine start.
Battery positive voltage is more than 10 V and is less than 16.5 V.

Judgement Criteria

Failed valve lift sensor
Open circuit or harness damage in valve lift sensor circuit or loose connector contact
Failed engine-ECU

DIAGNOSIS PROCEDURE

OK: 0.2 - 4.8 V (depends on engine operation condition)

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

	Go to Step 2.

OK: Continuity (2 Ω or less)

	Go to Step 5.

	Go to Step 3.

	Go to Step 4.

	Repair or replace the connector, or repair the damaged harness wire.

OK: 0.2 - 4.8 V (depends on engine operation condition)

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

	Replace the engine-ECU.

OK: 0.2 - 4.8 V (depends on engine operation condition)

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

	Go to Step 6.

After replacing the valve lift sensor, reconfirm whether the diagnosis code is set.

	Replace the engine-ECU.

	Check end.