[Previous][Next]
Inspection procedure 5: Starts up and dies
 
 
 
 
COMMENT
  • In such cases as the above, the cause is usually improper air/fuel mixture. It is possible, though less likely, that the spark plugs are generating sparks but the sparks are weak.
 
 
TROUBLESHOOTING HINTS (The most likely causes for this case:)
  • Fuel pump system failed.
  • Ignition system failed.
  • Injector system failed.
  • Poor compression.
  • EGR system failed.
  • Contaminated fuel.
  • Dirtiness around throttle valve.
  • ECM failed.

 
 
DIAGNOSIS
Required Special Tool:
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: V.C.I.
    • MB991827: USB Cable
    • MB991910: Main Harness A
STEP 1. Check if the EGR valve sounds during initialization.
Is the initialization sound heard in the EGR valve?
Go to Step 2.
Refer to GROUP 17, Emission Control - Exhaust Gas Recirculation (EGR) System - EGR Valve (stepper motor) Check .
 
STEP 2. Using scan tool MB991958, read the diagnostic trouble code (DTC).
cautionTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(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 set?
Refer to, Diagnostic Trouble Code Chart .
Go to Step 3.
 
STEP 3. Using scan tool MB991958, 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 .
  1. Item 1: Power Supply Voltage
  2. Item 6: Engine Coolant Temperature Sensor
(3) Turn the ignition switch to the "LOCK" (OFF) position.
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 MB991958, 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 .
  1. Item 9: Fuel Pump
(3) Turn the ignition switch to the "LOCK" (OFF) position.
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.
Is the throttle valve area dirty?
Refer to, Throttle Body (throttle valve area) Cleaning .
Go to Step 6.
 
STEP 6. Check the ignition timing.
Refer to GROUP 11C, On-vehicle Service - Ignition Timing Check .
Is the ignition timing normal?
Go to Step 7.
Check for installed conditions of the timing chain. Then confirm that the malfunction symptom is eliminated.
 
STEP 7. Check harness connectors B-101, B-102, B-105 and B-106 at injector for damage.
Are the harness connectors in good condition?
Go to Step 8.
Repair or replace them. Refer to GROUP 00E, Harness Connector Inspection . Then confirm that the malfunction symptom is eliminated.
 
STEP 8. Check the injector.
(1) Disconnect the injector connectors B-101, B-102, B-105 and B-106.
(2) Measure the resistance between each injector side connector terminal No. 1 and No. 2.
Standard value: 10.5 - 13.5 Ω [at 20°C (68°F)]
Is the measured resistance between 10.5 and 13.5 Ω [at 20°C (68°F)]?
Go to Step 9.
Replace the faulty injector. Then confirm that the malfunction symptom is eliminated.
 
STEP 9. Check harness connector A-37X at MFI relay and harness connector A-70X at injector relay for damage.
Are the harness connectors in good condition?
  • Go to Step 10.
Repair or replace them. Refer to GROUP 00E, Harness Connector Inspection . Then confirm that the malfunction symptom is eliminated.
 
STEP 10. Check for harness damage between MFI relay connector A-37X (terminal No. 2) and injector relay connector A-70X (terminal No. 4).
Is the harness wire in good condition?
Go to Step 11.
Repair it. Then confirm that the malfunction symptom is eliminated.
 
STEP 11. Check for harness damage between injector relay connector and injector connector.
noteCheck harness after checking intermediate connector A-17. If intermediate connector is damaged, repair or replace it. Refer to GROUP 00E, Harness Connector Inspection . Then confirm that the malfunction symptom is eliminated.
  1. Check the harness wire between injector relay connector A-70X (terminal No. 3) and injector connector B-101 (terminal No. 1) at No. 1 cylinder injector.
  2. Check the harness wire between injector relay connector A-70X (terminal No. 3) and injector connector B-102 (terminal No. 1) at No. 2 cylinder injector.
  3. Check the harness wire between injector relay connector A-70X (terminal No. 3) and injector connector B-105 (terminal No. 1) at No. 3 cylinder injector.
  4. Check the harness wire between injector relay connector A-70X (terminal No. 3) and injector connector B-106 (terminal No. 1) at No. 4 cylinder injector.
Are the harness wires in good condition?
Go to Step 12.
Repair them. Then confirm that the malfunction symptom is eliminated.
 
STEP 12. Check the spark plugs.
Refer to GROUP 16, Ignition System - On-vehicle Service - Spark Plug Check and Cleaning .
Are there any abnormalities?
Replace the spark plug. Then confirm that the malfunction symptom is eliminated.
Go to Step 13.
 
STEP 13. Check the ignition coil.
Refer to GROUP 16, Ignition System - On-vehicle Service - Ignition Coil Check .
Are there any abnormalities?
Replace the ignition coil. Then confirm that the malfunction symptom is eliminated.
Go to Step 14.
 
STEP 14. Check the compression pressure.
Refer to GROUP 11C, On-vehicle Service - Compression Pressure Check .
Is the compression pressure normal?
  • Check the following items, and repair or replace the defective items.
    1. Check fuel lines for clogging.
    2. Check if fuel is contaminated.
    3. Check if the injectors are clogged.
  • Then confirm that the malfunction symptom is eliminated.
Repair it. Then confirm that the malfunction symptom is eliminated.