Inspection Procedure

HINT:

Read freeze frame data using the Techstream. Freeze frame data record 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. INSPECT FUSE (ETCS FUSE) 
   1. Remove the ETCS fuse from the engine room relay block.
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      ETCS fuse	Always	Below 1 Ω

   3. Reinstall the ETCS fuse.

      NG: CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED TO FUSE 

      Fig 1: Identifying ETCS Fuse

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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 

      STANDARD VOLTAGE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      E11-23 (+BM) - E11-12 (E1)	Always	11 to 14 V

      NG: Go to step 3 

      Fig 2: Identifying E11 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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 relay block.
      2. Disconnect the ECM connector.
      3. Measure the resistance according to the value(s) in the table below.

         Standard Resistance (Check for Open) 

         STANDARD RESISTANCE SPECIFICATION
         
         

         Tester Connection	Condition	Specified Condition
         2 (ETCS fuse) - E11-23 (+BM)	Always	Below 1 Ω

         Standard Resistance (Check for Short) 

         STANDARD RESISTANCE SPECIFICATION
         
         

         Tester Connection	Condition	Specified Condition
         2 (ETCS fuse) or E11-23 (+BM) - Body ground	Always	10 kΩ or higher

      4. Reinstall the ETCS fuse.
      5. Reconnect the ECM connector.
   2. Check the harness and connector between the ETCS fuse and positive battery cable.
      1. Remove the ETCS fuse from the engine room R/B.
      2. Disconnect the positive battery cable.
      3. Measure the resistance according to the value(s) in the table below.
         Fig 3: Identifying ETCS Fuse And E11 ECM Connector

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

         Standard Resistance (Check for Open) 

         STANDARD RESISTANCE SPECIFICATION
         
         

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

         Standard Resistance (Check for Short) 

         STANDARD RESISTANCE SPECIFICATION
         
         

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

      4. Reinstall the ETCS fuse.
      5. Reconnect the positive battery cable.

         NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

         OK: REPLACE ECM  (See ECM  )