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TSB Revision SYMPTOM PROCEDURES 13Ad-49 STEP 4. Inspection of throttle body (throttle valve area) for YES : Refer to GROUP 13A, On-vehicle Service − Clean the throttle valve area . NO : Check the following items, and repair, replace or clean the defective sections. a. Check the ignition coil, spark plugs, spark plug cables. b. Check the EGR valve. Then confirm that the malfunction symptom is eliminated. INSPECTION PROCEDURE 15: Hesitation, sag or stumble. . COMMENT • In cases such as the above, the ignition system, air/fuel mixture, electronic control throttle valve . TROUBLESHOOTING HINTS (The most likely • Malfunction of the ignition system. • Malfunction of air/fuel ratio control system. • Malfunction of the electronic control throttle valve system. • Malfunction of the fuel supply system. • Malfunction of the EGR system. • Poor compression pressure. DIAGNOSIS Required Special Tool: • MB991502: Scan Tool (MUT-II) STEP 1. Using scan tool MB991502, read the diagnostic CAUTION To prevent damage to scan tool MB991502, always turn the YES : Refer to GROUP 13A, Diagnostic Trouble Code Chart NO : Go to Step 2. ACX01539 16-PIN MB991502 AC |