Inspection Procedure

HINT:

• If different DTCs that are related to a different system are output simultaneously while terminal E2 is used as a ground terminal, terminal E2 may be open.
• Read freeze frame data using Techstream. Freeze frame data records the engine conditions when malfunctions are 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. INSPECT BATTERY CURRENT SENSOR ASSEMBLY 
   1. Disconnect the B29 battery current sensor connector.
      Fig 1: Identifying Battery Current Sensor Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Measure the resistance of the battery current sensor.

      Standard resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      2 (VC5) - 4 (E2)	3 to 10 kΩ
      2 (VC5) - 3 (IB)	Below 0.5 kΩ
      3 (IB) - 4 (E2)	3 to 10 kΩ

      HINT:

      The resistance differs according to the tester type.

   NG: REPLACE BATTERY CURRENT SENSOR ASSEMBLY 

   OK: Go to Next Step 

2. CHECK HARNESS AND CONNECTOR (BATTERY CURRENT SENSOR - ECM) 
   1. Disconnect the B29 battery current sensor connector.
   2. Disconnect the B30 ECM connectors.
      Fig 2: Identifying Battery Current Sensor And ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      B29-3 (IB) - B30-68 (IB)	Below 1 Ω
      B29-2 (VC5) - B30-69 (VCIB)	Below 1 Ω
      B29-4 (E2) - B30-92 (EIB)	Below 1 Ω
      B29-1 (THB) - B30-120 (THB)	Below 1 Ω

      Standard resistance (Check for short) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      B29-3 (IB) or B30-68 (IB) - Body ground	10 kΩ or higher
      B29-2 (VC5) or B30-69 (VCIB) - Body ground	10 kΩ or higher
      B29-1 (THB) or B30-120 (THB) - Body ground	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   OK: REPLACE ECM