Throttle Body Carbon Accumulation Check: Inspection

How to use this manual .

1. Throttle Body - Inspect

   Preconditions 

   • HDS Connected 
   • Engine Warmed Up

     NOTE:  Warm up the engine by raising the engine speed around 3,000 rpm until the cooling fan(s) comes on.

   • Transmission P or N Position/Mode
   • Following No Load Conditions
     • Set the front wheels in the straight ahead position
     • Headlights OFF
     • Blower Fan OFF
     • Rear Window Defogger OFF
     • Air Conditioner OFF
     • Radiator Fan OFF

   Procedure/Specifications 

   1. Keep idling under no load conditions for 1 minute or more.

   2. Select the following menu buttons on the HDS screen in sequence.

   • PGM-FI (System Selection Menu)
   • Data List
   • REL TP Sensor

   Specifications 

   HDS Item	Specification
   REL TP Sensor	Should be below 2.46°

   Result 

   • If the measurement is not within specifications, clean the throttle body - Refer to: Throttle Body Cleaning ()  or Throttle Body Carbon Accumulation Check () .