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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 370 (INTAKE AIR CONTROL SYSTEM)INTAKE AIR CONTROL SYSTEM (3MZ-FE)INSPECTION

2004 Toyota Celica GT, Standard

Intake Air Control System (3MZ-FE): Inspection

2004 Toyota Celica GT, StandardSECTION Inspection

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT INTAKE AIR CONTROL VALVE ASSY NO. 2
1. Check the operation.
  1. With vacuum of 26.7 kPa (200 mmHg, 7.9 in.Hg) applied to the actuator, check that the valve closes.
  2. 1 minute after applying the vacuum, check that the valve remains closed.
    
    Fig 1: Checking That Valve Remains Closed
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE: Do not adjust the adjust screw.

If the operation is not as specified, replace the intake air control valve No. 2.
INSPECT INTAKE AIR CONTROL VALVE ASSY NO. 3
1. Check the operation.
  1. With vacuum of 26.7 kPa (200 mmHg, 7.9 in.Hg) applied to the actuator, check that the valve opens.
  2. 1 minute after applying the vacuum, check that the valve remains opened.
    If the operation is not as specified, replace the intake air control valve No. 3.
    
    Fig 2: Checking That Valve Remains Opened
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the resistance.
  1. Using an ohmmeter, measure the resistance between the terminals.
    
    Fig 3: Tester Specification
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  If the resistance is not as specified, replace the intake air control valve No. 3.
  
  Fig 4: Measuring Resistance Between Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the continuity.
  1. Using an ohmmeter, check that there is no continuity between each terminal and the body.
  If there is continuity, replace the intake air control valve No. 3.
  
  Fig 5: Checking That No Continuity Between Terminal And Body
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check the operation.
  1. Check that air flows from port E to the filter.
    
    Fig 6: Checking That Air Flows From Port E To Filter
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Apply battery voltage across the terminals.
  3. Check that air flows from port E to F.
  If the operation is not as specified, replace the intake air control valve No. 3.
  
  Fig 7: Checking That Air Flows From Port E To F
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT VACUUM SWITCHING VALVE ASSY NO. 1
1. Inspect the resistance.
  1. Using an ohmmeter, measure the resistance between the terminals.
    
    Fig 8: Tester Specification
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  If the resistance is not as specified, replace the vacuum switching valve No. 1.
  
  Fig 9: Measuring Resistance Between Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the continuity.
  1. Using an ohmmeter, check that there is no continuity between each terminal and the body.
  If there is continuity, replace the vacuum switching valve No. 1.
  
  Fig 10: Checking That No Continuity Between Terminal And Body
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the operation.
  1. Check that air flows from port E to the filter.
    
    Fig 11: Checking That Air Flows From Port E To Filter
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Apply battery voltage across the terminals.
  3. Check that air flows from port E to F.
    If the operation is not as specified, replace the vacuum switching valve No. 1.
    
    Fig 12: Checking That Air Flows From Port E To F
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT AIR CLEANER CAP SUB-ASSY
1. Check the operation.
  1. Cover port C with your finger, then check that the air flow from port B to A.
  2. Cover port C with your finger, then check that the air does not flow from port A to B.
  3. Cover ports A and C with your fingers, then apply 60 kPa (450 mmHg, 18 in.Hg) of vacuum to port B. Check that there is no vacuum change after 1 minute.
If the operation is not as specified, replace the air cleaner cap.

Fig 13: Inspecting Air Cleaner CAP Sub-Assy
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002