Inspection Procedure

HINT:

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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. INSPECT THROTTLE BODY (RESISTANCE OF THROTTLE ACTUATOR) 
   1. Disconnect the throttle body connector.
   2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

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

   3. Reconnect the throttle body connector.

      NG: REPLACE THROTTLE BODY  (See REMOVAL )

      Fig 1: Identifying Throttle Body Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

2. CHECK HARNESS AND CONNECTOR (THROTTLE BODY - ECM) 
   1. Disconnect the throttle body connector.
   2. Disconnect the ECM connector.
   3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance (Check for Open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      B27-2 (M+) - B48-18 (M+)	Always	Below 1 Ω
      B27-1 (M-) - B48-19 (M-)	Always	Below 1 Ω

      Standard Resistance (Check for Short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      B27-2 (M+) or B48-18 (M+) - Body ground	Always	10 kΩ or higher
      B27-1 (M-) or B48-19 (M-) - Body ground	Always	10 kΩ or higher

   4. Reconnect the ECM connector.
   5. Reconnect the throttle body connector.

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 2: Identifying ECM And Throttle Body Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

3. INSPECT THROTTLE BODY (VISUALLY CHECK THROTTLE VALVE) 
   1. Check for foreign objects between the throttle valve and the housing.

      OK: 

      No foreign objects between the throttle valve and housing. 

      NG: REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY 

      OK: Go to next step 

4. INSPECT THROTTLE BODY (THROTTLE VALVE) 
   1. Check if the throttle valve opens and closes smoothly.

      OK: 

      Throttle valve opens and closes smoothly. 

      NG: REPLACE THROTTLE BODY  (See REMOVAL )

      OK: REPLACE ECM  (See REMOVAL )