STEP 1. Check if the EGR valve sounds during initialization.
STEP 2. Using scan tool (M.U.T.-IIISE), read the diagnostic trouble code (DTC).
caution | To prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE). |
(1) Connect scan tool (M.U.T.-IIISE). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE) . (2) Turn on the power supply mode of the electric motor switch.
(3) Read the DTC.
(4) Turn off the power supply mode of the electric motor switch.
Is any DTC set?
Refer to Diagnostic Trouble Code Chart . Go to Step 3.
STEP 3. Check the ignition timing.
STEP 4. Using scan tool (M.U.T.-IIISE), check data list.
(1) Turn on the power supply mode of the electric motor switch.
(2) Check the following items in the data list. Refer to Data List Reference Table .- Item 5: Intake Air Temperature Sensor
- Item 6: Engine Coolant Temperature Sensor
- Item AD: Heated Oxygen Sensor (rear)
- Item E1: Linear Air-fuel Ratio Sensor
(3) Turn off the power supply mode of the electric motor switch.
Are they operating properly?
Go to Step 5. Repair or replace it. Then confirm that the malfunction symptom is eliminated.
STEP 5. Check the fuel pressure.
STEP 6. Check the spark plugs.
STEP 7. Check the ignition coil.
STEP 8. Check the compression pressure.
STEP 9. Check the positive crankcase ventilation system.
STEP 10. Check the evaporative emission control system.