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 any DTC stored?
Refer to Diagnostic Trouble Code Chart . Go to Step 2.
STEP 2. Using scan tool (M.U.T.-III), check actuator test.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following item in the actuator test. Refer to Actuator Test Reference Table . (3) Turn the ignition switch to the "LOCK" (OFF) position.
Are they operating properly?
Go to Step 3. Repair or replace it. Then confirm that the malfunction symptom is eliminated.
STEP 3. Using scan tool (M.U.T.-III), check data list.
(1) Turn the ignition switch to the "ON" position.
(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 13: Throttle Position Sensor (main)
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Are they operating properly?
Go to Step 4. Repair or replace it. Then confirm that the malfunction symptom is eliminated.
STEP 4. Inspection of throttle body (throttle valve area) for dirtiness.
STEP 5. Check the fuel pressure.
STEP 6. Check the ignition timing.
STEP 7. Check the spark plugs.
STEP 8. Check the ignition coil.
STEP 9. Check the compression pressure.
STEP 10. Check the positive crankcase ventilation system.
STEP 11. Engine stall reproduction test.
Is it easy to reproduce the engine stall?
- Check the following items, and repair or replace the defective items.
- Vacuum leak.
- Check if fuel is contaminated.
- Check if the injectors are clogged.
- Check if the foreign materials (water, diesel fuel, etc.) got into fuel.
- Then confirm that the malfunction symptom is eliminated.
- Check if the following signals change suddenly by wiggling the circuit harness and connectors.
- Crankshaft position sensor signal.
- Mass airflow sensor signal.
- Injector drive signal.
- Primary and secondary ignition signal.
- Fuel pump drive signal.
- ECM power supply voltage.
- Then confirm that the malfunction symptom is eliminated.