TL L5-2451cc 2.5L SOHC G25A4 FI (1995)
Intake Air Bypass (IAB) Control System: Testing and Inspection
Intake Air Bypass (IAB) Control Valve Testing
CAUTION: Do not adjust the IAB control valve full-close screw. It was preset at the factory.
1. Check the IAB control valve shaft for binding or sticking.
2. Check the IAB control valve for smooth movement.
3. Check that (A) of the IAB control valve is in close contact with the stopper when the vacuum hose is disconnected from the IAB control
diaphragm.
4. Check that (B) of the IAB control valve is in close contact with the full-close screw when you apply 51 kPa (380 mmHg, 15 inHg) of vacuum to
the IAB control diaphragm.
If any fault is found, clean the linkage and shafts with carburetor cleaner. If the problem still exists after cleaning, disassemble the intake manifold
and check the IAB valve body assembly.
