Inspection Procedure

HINT:

Read freeze frame data using the Intelligent tester or Techstream. Freeze frame data records the engine condition when malfunctions are detected. 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. CHECK FUSE (ETCS) 
   1. Remove the ETCS fuse from the engine room No. 2 junction block.
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      FUSE (ETCS)
      
      

      Tester Connection	Condition	Specified Condition
      ETCS fuse	Always	Below 1 Ω

      Fig 1: Identifying ECTS Fuse

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE 

   OK: GO TO NEXT STEP 

2. INSPECT ECM (+BM VOLTAGE) 
   1. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      ECM (+BM VOLTAGE)
      
      

      Tester Connection	Condition	Specified Condition
      E1-1 (+BM) - E3-1 (E1)	Always	11 to 14 V

      Fig 2: Identifying ECM Connector Terminal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: CHECK FOR INTERMITTENT PROBLEMS (See  CHECK FOR INTERMITTENT PROBLEMS  ) 

   NG: GO TO NEXT STEP 

3. CHECK HARNESS AND CONNECTOR (ECM - ETCS FUSE, ETCS FUSE - BATTERY) 
   1. Check the harness and connector between the ETCS fuse and ECM.
      1. Remove the ETCS fuse from the engine room No. 2 junction block.
      2. Disconnect the E1 ECM connector.
      3. Measure the resistance according to the value(s) in the table below.

         Standard resistance (Check for open) 

         ECM - ETCS FUSE (CHECK FOR OPEN)
         
         

         Tester Connection	Condition	Specified Condition
         ETCS fuse (2) - E1-1 (+BM)	Always	Below 1 Ω

         Standard resistance (Check for short) 

         ECM - ETCS FUSE (CHECK FOR SHORT)
         
         

         Tester Connection	Condition	Specified Condition
         ETCS fuse (2) or E1-1 (+BM) - Body ground	Always	10 kΩ or higher

   2. Check the harness and connector between the ETCS fuse and positive battery cable.
      1. Remove the ETCS fuse from the engine room No. 2 junction block.
      2. Disconnect the positive battery cable.
      3. Measure the resistance according to the value(s) in the table below.

         Standard resistance (Check for open) 

         ETCS FUSE - BATTERY (CHECK FOR OPEN)
         
         

         Tester Connection	Condition	Specified Condition
         Positive battery cable - ETCS fuse (1)	Always	Below 1 Ω

         Standard resistance (Check for short) 

         ETCS FUSE - BATTERY (CHECK FOR SHORT)
         
         

         Tester Connection	Condition	Specified Condition
         Positive battery cable or ETCS fuse (1) - Body ground	Always	10 kΩ or higher

         Fig 3: Identifying Connector Terminal Of E1 ECM Connector

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM (See  REMOVAL  )