Inspection Procedure 12

Inspection Procedure 12: The Engine Stalls When Accelerating (Pass Out)

COMMENT
- In case such as the above, the cause is probably misfiring due to a weak spark, or an inappropriate air/fuel mixture when the accelerator pedal is depressed.

TROUBLESHOOTING HINTS (The most likely causes for this case:)
- Ignition system failed.
- Evaporative emission control system failed.
- EGR system failed.
- Improper operation of the PCV valve.
- Vacuum leak.
- 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.

Q: Is the initialization sound heard in the EGR valve?

YES : Go to Step 2.

NO : Refer to Emission Control - Exhaust Gas Recirculation (EGR) System - EGR Valve (stepper motor) Check. [1][2]Component Tests and General Diagnostics

STEP 2. Using scan tool MB991958, read the diagnostic trouble code (DTC).







CAUTION: To 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.

Q: Is any DTC set?

YES : Refer to, Diagnostic Trouble Code Chart. Multiport Fuel Injection (MFI)

NO : Go to Step 3.

STEP 3. 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. Actuator Test Reference Table
a. Item 10: Evaporative Emission Purge Solenoid

3. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the actuator operating properly?

YES : Go to Step 4.

NO : Repair or replace it. Then confirm that the malfunction symptom is eliminated.

STEP 4. Check the spark plugs.
Refer to Ignition System - On-vehicle Service - Spark Plug Check and Cleaning. Testing and Inspection

Q: Are there any abnormalities?

YES : Replace the spark plug. Then confirm that the malfunction symptom is eliminated.

NO : Go to Step 5.

STEP 5. Check the ignition coil.
Refer to Ignition System - On-vehicle Service - Ignition Coil Check. Component Tests and General Diagnostics

Q: Are there any abnormalities?

YES : Replace the ignition coil. Then confirm that the malfunction symptom is eliminated.

NO : Go to Step 6.

STEP 6. Check the positive crankcase ventilation system.
Refer to Emission Control - Positive Crankcase Ventilation System - Crankcase Ventilation System Check. Crankcase Ventilation System Check

Q: Is the positive crankcase ventilation system normal?

YES : Check the following item, and repair or replace the defective item.
a. Vacuum leak.

Then confirm that the malfunction symptom is eliminated.

NO : Repair it. Then confirm that the malfunction symptom is eliminated.