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.

1. CHECK FUSE (ETCS) 
   1. Remove the ETCS fuse from the engine room No 2 relay block
   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
      ETCS fuse	Always	Below 1 Ω

   3. Reinstall the ETCS fuse
   Fig 1: Identifying ETCS Fuse From Engine Room No 2 Relay Block
   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 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      E3-1 (+BM) - E6-1 (E1)	Always	11 to 14 V

   Fig 2: Identifying ECM Connector E3 And E6
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: Go to step 3 

   OK: REPLACE ECM  (See REMOVAL )

3. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) 
   1. Disconnect the ECM 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
      E6-1 (E1) - Body ground	Always	Below 1 Ω

   3. Reconnect the ECM connector.
   Fig 3: Identifying ECM Connector E6
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

4. INSPECT FUSIBLE LINK BLOCK ASSEMBLY (E/G-B FUSE) 
   1. Remove the fusible link block assembly from the engine room No. 1 relay block.
   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
      1C-1 - 1B-1	Always	Below 1 Ω

   3. Reinstall the fusible link block assembly.
   Fig 4: Identifying Fusible Link Block Assembly From Engine Room No. 1 Relay Block
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE FUSIBLE LINK BLOCK ASSEMBLY (E/G-B FUSE) 

   OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BATTERY)