Inspection Procedure

HINT:

Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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 R/B No. 2.
   2. Measure the resistance of the ETCS fuse.
      Fig 1: Locating Engine Room R/B No.2 ETCS Fuse

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: Below 1 Ω 

   1. NG: REPLACE FUSE 
   2. OK: GO TO NEXT STEP. 
2. INSPECT ECM (+BM VOLTAGE) 
   1. Measure the voltage of the ECM connectors.
      Fig 2: Identifying EMC Voltage Test Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION AND CONDITION SPECIFICATIONS
      
      

      Tester Connection	Specified Condition
      E6-6 (+BM) - E9-4 (ME01)	9 to 14 V

   1. OK: REPLACE ECM (See  REPLACEMENT  ) 
   2. NG: GO TO NEXT STEP. 
3. CHECK WIRE HARNESS (ECM - ETCS FUSE, ETCS FUSE - BATTERY) 
   1. Check the wire harness between the ETCS fuse and ECM.
      1. Remove the ETCS fuse from the engine room R/B No. 2.
      2. Disconnect the E6 ECM connector.
      3. Measure the resistance of the wire harness side connectors.
      Fig 3: Checking Wire Harness Between ETCS Fuse And ECM
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION AND CONDITION SPECIFICATIONS
      
      

      Tester Connection	Specified Condition
      R/B No. 2 ETCS fuse terminal 2 - E6-6 (+BM)	Below 1 Ω
      R/B No. 2 ETCS fuse terminal 2 or E6-6 (+BM) - Body ground	10 kΩ or higher

   2. Check the wire harness between the ETCS fuse and battery.
      1. Remove the ETCS fuse from the engine room R/B No. 2.
      2. Disconnect the battery positive cable.
      3. Measure the resistance of the wire harness side connectors.
      Fig 4: Locating Engine Room J/B No.2 ETCS Fuse
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION AND CONDITION SPECIFICATIONS
      
      

      Tester Connection	Specified Condition
      Battery positive cable - R/B No. 2 ETCS fuse terminal 1	Below 1 Ω
      Battery positive cable or R/B No. 2 ETCS fuse terminal - Body ground 1	10 kΩ or higher

   1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
   2. OK: CHECK ENGINE ROOM RELAY BLOCK NO.2