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:)

- Vacuum leak.
- Malfunction of the ignition system.
- Malfunction of the emission control system.

DIAGNOSIS

Required Special Tools:

- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A

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 the DTC set?

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

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: Evaporative Emission Purge Solenoid.
(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.
2. Check the ignition coil and spark plugs.
3. Check for vacuum leaks.

- Broken intake manifold gasket.
- Broken or disconnected vacuum hose.
- Improper operation of the PCV valve.
- Broken air intake hose.
4. Check the EGR valve.
Then confirm that the malfunction symptom is eliminated.

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