Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. 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.

1. INSPECT THROTTLE W/ MOTOR BODY ASSEMBLY (THROTTLE CONTROL MOTOR) 
   1. Disconnect the throttle control motor connector.
   2. Measure the motor resistance between terminals 1 (M-) and 2 (M+).

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

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

   NG: REPLACE THROTTLE W/ MOTOR BODY ASSEMBLY 

   Fig 1: Identifying T2 Throttle Control Motor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to Next Step 

2. CHECK HARNESS AND CONNECTOR (ECM - THROTTLE CONTROL MOTOR) 
   1. Disconnect the E5 ECM connector.
      Fig 2: Disconnecting E5 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Disconnect the T2 throttle control motor connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      2 (Throttle control motor) - E5-6 (M+)	Below 1 Ω
      1 (Throttle control motor) - E5-5 (M-)	Below 1 Ω

      Fig 3: Identifying Throttle Control Motor Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      2 (Throttle control motor) or E5-6 (M+) - Body ground	10 kΩ or higher
      1 (Throttle control motor) or E5-5 (M-) - Body ground	10 kΩ or higher

   4. Reconnect the ECM connector and the throttle control motor connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

3. INSPECT THROTTLE W/ MOTOR BODY ASSEMBLY 
   1. Visually check between the throttle valve and the housing for foreign objects.

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

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

   NG: REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY 

   OK: REPLACE ECM