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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
• The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor Open Duty/Throttle Motor Close Duty) can be read using the Techstream. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions

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
   Fig 1: Identifying Throttle Body Connector
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE THROTTLE BODY  (See REMOVAL )

   OK: Go to next step 

2. CHECK HARNESS AND CONNECTOR (THROTTLE ACTUATOR - 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
      E17-2 (M+) - E4-7 (M+)	Always	Below 1 Ω
      E17-1 (M-) - E4-6(M-)	Always	Below 1 Ω

      Standard Resistance (Check for Short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      E17-2 (M+) or E4-7 (M+) - Body ground	Always	10 kΩ or higher
      E17-1 (M-) or E4-6 (M-) - Body ground	Always	10 kΩ or higher

   4. Reconnect the throttle body connector and ECM connector.
   Fig 2: Identifying Throttle Body Connector E17 And ECM Connector E4
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

3. REPLACE THROTTLE BODY ASSEMBLY 
   1. Replace throttle body assembly (See REMOVAL ).
4. CHECK WHETHER DTC OUTPUT RECURS (THROTTLE ACTIVATOR DTC) 
   1. Connect the Techstream to the DLC3.
   2. Turn the engine switch on (IG) and turn the Techstream ON.
   3. Clear DTCs (See DTC CHECK/CLEAR )
   4. Start the engine.
   5. Drive the vehicle several minutes
   6. Enter the following menus. Powertrain / Engine / Trouble Codes.
   7. Read the DTCs

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC P2102 or P2103 is output	A
      DTC is not output	B

   B: SYSTEM OK 

   A: REPLACE ECM  (See REMOVAL )