Inspection Procedure

HINT:

Read freeze frame data using a hand-held tester or OBD II scan tool. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

1. Check throttle control motor (See  THROTTLE BODY (SMT)  ). 
   • NG: Replace throttle control motor (See  REMOVAL  ). 
   • OK: Go to next step. 
2. Check for open and short in harness and connectors between throttle control motor and ECM (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
   • NG: Repair or replace harness or connector. 
   • OK: Go to next step. 
3. Visually check throttle valve. 

   PREPARATION: 

   Remove the intake air connector.

   CHECK: 

   Visually check between the throttle valve and the housing for foreign objects.

   Also, check if the valve can open and close smoothly.

   • NG: Remove foreign object and clean throttle body. 
   • OK: Replace ECM (See  ENGINE CONTROL MODULE (ECM)  ).