Code No. P2648: Valve Lift Control Motor Coil Open




OPERATION




FUNCTION




TROUBLE JUDGMENT


Check Conditions
Judgement Criteria
  1. When the power supply voltage to the valve lift control motor is 8 V or more, all the terminal voltages at U, V and W phases are 7 V or less.

FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Check valve lift control motor itself.



  • Valve lift control motor connector check.
  • Check valve lift control motor (Refer to ).

Q. Is the check result normal?

Go to Step 2.
Repair or replace the connector, or replace the valve lift control motor.

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



  • Check power supply 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 3. Check harness between valve lift control motor connector terminal and valve lift ECU connector terminal VLMU.



  • Check power supply 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 valve lift control motor connector terminal and valve lift ECU connector terminal VLMW.



  • Check power supply line for open circuit and damage.

Q. Is the check result normal?

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

STEP 5. 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 ).