Engine Mechanical: 1D-16
Throttle Body Inspection and Cleaning
B823H11406012
Refer to “Throttle Body Disassembly and Assembly
(Page 1D-12)”.
Cleaning
WARNING
!
Some carburetor cleaning chemicals,
especially dip-type soaking solutions, are
very corrosive and must be handled carefully.
Always follow the chemical manufacturer’s
instructions on proper use, handling and
storage.
• Clean passageways with a spray-type carburetor
cleaner and blow dry with compressed air.
CAUTION
!
Never clean the throttle body main bore. Do
not use wire to clean passageways. Wire can
damage passageways. If the components
cannot be cleaned with a spray cleaner it may
be necessary to use a dip-type cleaning
solution and allow them to soak. Always
follow the chemical manufacturer’s
instructions for proper use and cleaning of
the throttle body components. Do not apply
carburetor cleaning chemicals to the rubber
and plastic materials.
Inspection
Check following items for any defects or clogging.
Replace the damaged part if necessary.
•O-rings
• Throttle valves
• Secondary throttle valves
• Vacuum hoses
• ISC valve hoses
• Fuel delivery pipes
• Cushion seals
• Fuel injectors
ISC Valve Visual Inspection
B823H11406045
Visually inspect the ISC valve if necessary.
• Inspect the ISC valve for any carbon deposition
defects. Clean or replace the ISC valve if necessary.
Throttle Valve Synchronization
B823H11406013
Use of SDS Tool
Check and adjust the throttle valve synchronization
among four cylinders.
1) Lift and support the fuel tank. Refer to “Fuel Tank
Removal and Installation in Section 1G (Page 1G-
10)”.
2) Disconnect the respective vacuum hoses (1) from
each vacuum nipple on the throttle body.
3) Disconnect the IAP sensor coupler (2).
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