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. 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 1: Power Supply Voltage
- Item 6: Engine Coolant Temperature Sensor
(3) Turn off the power supply mode of the electric motor switch.
Is the sensor operating properly?
Go to Step 4. Repair or replace it. Then confirm that the malfunction symptom is eliminated.
STEP 4. Using scan tool (M.U.T.-IIISE), check actuator test.
(1) Turn on the power supply mode of the electric motor switch.
(2) Set scan tool (M.U.T.-IIISE) to the actuator test mode for item 9, Fuel Pump.- An operation sound of the fuel pump should be heard.
(3) Turn off the power supply mode of the electric motor switch.
Is the actuator operating properly?
Go to Step 5. Repair or replace it. Then confirm that the malfunction symptom is eliminated.
STEP 5. Inspection of throttle body (throttle valve area) for dirtiness.
STEP 6. Check the ignition timing.
STEP 7. Check the fuel pressure.
STEP 8. Check the injector.
STEP 9. Check of harness damage in power supply line between MFI relay connector and injector connector.
STEP 10. Check the spark plugs.
STEP 11. Check the ignition coil.
STEP 12. Check the compression pressure.