Inspection Procedure

HINT:

• Read freeze frame data using 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 (See FREEZE FRAME DATA ).
• The throttle actuator current (THROTTLE MOT) and the throttle actuator duty ratio (THROTTLE OPN DUTY / THROTTLE CLS DUTY) can be read using Techstream. However, the ECM shuts off the throttle actuator current when the ETCS malfunctions.

1. INSPECT THROTTLE BODY (RESISTANCE OF THROTTLE CONTROL MOTOR) 
   1. Disconnect the E17 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
      M+ (E17-2) - M - (E17-1)	20°C (68°F)	0.3 to 100 Ω

   3. Reconnect the throttle body connector.
   Fig 1: Identifying Terminals Of E17 Throttle Body Connector
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE THROTTLE BODY 

   OK: Go to next step 

2. CHECK HARNESS AND CONNECTOR (THROTTLE CONTROL MOTOR - ECM) 
   1. Disconnect the E17 throttle body connector.
   2. Disconnect the E3 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	Specified Condition
      M+ (E17-2) - M+ (E3-2)	Below 1 Ω
      M - (E17-1) - M - (E3-1)	Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      M+ (E17-2) or M+ (E3-2) - Body ground	10 kΩ or higher
      M- (E17-1) or M- (E3-1) - Body ground	10 kΩ or higher

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

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   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.

   NG: REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY 

   OK: Go to next step 

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

   NG: REPLACE THROTTLE BODY 

   OK: REPLACE ECM