Inspection Procedure 13

INSPECTION PROCEDURE 13: 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:)
- Vacuum leak.
- Malfunction of the ignition system.

DIAGNOSIS

Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991911: Main Harness B

STEP 1. 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 DTC set?

YES: Refer to, Diagnostic Trouble Code Chart. Diagnostic Trouble Code Descriptions

NO: Go to Step 2.

STEP 2. 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: EGR Vacuum Regulator Solenoid Valve.

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

Q: Is the actuator operating properly?

YES: Check the following items, and repair or replace the defective items.
a. Check the ignition coil, spark plugs and spark plug cables.
b. Check for vacuum leaks.
- Broken intake manifold gasket.
- Broken or disconnected vacuum hose.
- Improper operation of the PCV valve.
- Broken air intake hose.
Then confirm that the malfunction symptom is eliminated.

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