1A-356 Engine Control System (4HK1)
Air Intake System Checks Inspect the air intake system for the following conditions.
• Air cleaner, air intake ducts and charge air cooler for a restriction, holes, or
leaks.
• A restriction in the turbocharger inlet duct.
• Intake throttle valve for a stuck condition.
• A restriction or leak in the intake manifold.
• Turbocharger nozzle control solenoid for a stuck condition. Refer to
Turbocharger Assembly in Section 1J Induction.
Exhaust System Checks Inspect the exhaust system for a possible restriction. Refer to Exhaust System
in Section 1G Engine Exhaust.
Additional Checks • Inspect the EGR system operating correctly. Refer to EGR Control System
Check in this section.
• Inspect the A/C operation.
• Inspect the lock up clutch operation. (Smoother only)
• Inspect deformed tire(s) that may cause surges at fixed vehicle speed
range.
Checks Action
LG4HKED-WE-0871.book 356 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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