STEP 1. Using scan tool (M.U.T.-III), read the diagnostic trouble code (DTC).
caution | To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III). |
(1) Connect scan tool (M.U.T-III). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) . (2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the diagnostic trouble code other than P2646 stored?
Refer to, Diagnostic Trouble Code Chart . Go to Step 2.
STEP 2. Check the variable valve lift control motor.
STEP 3. Check of harness damage in VLMV line between variable valve lift control motor connector and valve lift ECU connector.
STEP 4. Check of harness damage in VLMU line between variable valve lift control motor connector and valve lift ECU connector.
STEP 5. Check of harness damage in VLMW line between variable valve lift control motor connector and valve lift ECU connector.
STEP 6. Variable valve lift mechanism check
STEP 7. Replace the valve lift ECU.
STEP 8. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 23 . (2) Check the diagnostic trouble code (DTC).
Is DTC P2646 stored?
Retry the troubleshooting. The inspection is complete.