Inspection Procedure

HINT:

• If DTCs related to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
• Read freeze frame data using the intelligent tester. 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.
   2. Measure the resistance of the battery current sensor.

      Standard resistance 

      CONNECTOR TERMINALS RESISTANCE REFERENCE AND CONDITION
      
      

      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

      Fig 1: Identifying B29 Battery Current Sensor Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      The resistance differs according to the tester type.

   NG: REPLACE BATTERY CURRENT SENSOR ASSEMBLY 

   OK: Go TO NEXT STEP. 

2. CHECK WIRE HARNESS (BATTERY CURRENT SENSOR - ECM) 
   1. Disconnect the B29 battery current sensor connector.
   2. Disconnect the B30 ECM connectors.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      CONNECTOR TERMINALS RESISTANCE REFERENCE AND CONDITION
      
      

      Tester Connection	Specified Condition
      B29-3 (IB) - B30-100 (IB)	Below 1 Ω
      B29-2 (VC5) - B30-80 (VCIB)	Below 1 Ω
      B29-4 (E2) - B30-101 (EIB)	Below 1 Ω
      B29-1 (THB) - B30-103 (THB)	Below 1 Ω
      B29-3 (IB) or B30-100 (IB) - Body ground	10 kΩ or higher
      B29-2 (VC5) or B30-80 (VCIB) - Body ground	10 kΩ or higher
      B29-1 (THB) or B30-103 (THB) - Body ground	10 kΩ or higher

      Fig 2: Identifying B29 Battery Current Sensor & B30 ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

   OK: REPLACE ECM