Inspection Procedure

HINT:

Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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. INSPECT THROTTLE BODY ASSY (THROTTLE ACTUATOR) 
   1. Disconnect the T13 throttle actuator connector.
   2. Measure the resistance of the throttle actuator terminals.
      Fig 1: Identifying Throttle Actuator Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION AND CONDITION SPECIFICATIONS
      
      

      Tester Connection	Specified Condition
      T13-2 (M+) - T13-1 (M-)	0.3 to 100 Ω (20 °C (68° F))

   1. NG: REPLACE THROTTLE BODY ASSY 
   2. OK: GO TO NEXT STEP. 
2. CHECK WIRE HARNESS (THROTTLE ACTUATOR - ECM) 
   1. Disconnect the T13 throttle actuator connector.
   2. Disconnect the E9 ECM connector.
   3. Measure the resistance of the wire harness side connectors.
      Fig 2: Identifying Throttle Actuator & ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      Fig 3: Testing Harness Resistance

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
   2. OK: GO TO NEXT STEP. 
3. INSPECT THROTTLE BODY ASSY 
   1. Visually check for foreign objects between the throttle valve and the housing. Also, check if the valve can open and close smoothly.

      OK: The throttle valve is not contaminated with foreign objects and can move smoothly. 

   1. NG: REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY 
   2. OK: REPLACE ECM (See  REPLACEMENT  )