Terminals Of Ecu

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DRIVER SIDE JUNCTION BLOCK ASSY (BODY ECU) (REAR SIDE)
1. Disconnect the 2B, 2E, 2F and 2R driver side J/B connectors.
2. Check the voltage and continuity of each terminal of the wire harness side connectors.
  
  Fig 1: Identifying Driver Side Junction Block Assy (Rear Side) ECU Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 2: Driver Side Junction Block Connectors Continuity Specification Chart (Rear Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  If the value is not as specified the vehicle may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
CHECK DRIVER SIDE JUNCTION BLOCK ASSY (BODY ECU) (LEFT SIDE)
1. Disconnect the B5 and B6 ECU connectors.
2. Check the continuity of each terminal of the wire harness side connectors.
  
  Fig 3: Identifying Driver Side Junction Block Assy (Left Side) ECU Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 4: Driver Side Junction Block Terminal Continuity Specifications (Left Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  If the value is not as specified the vehicle may be defective, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.
3. Reconnect the wire harness side connector to the B5 and B6 driver side J/B (body ECU) connectors.
4. Check the voltage of each terminal of the wire harness side connectors.
  Standard:
  
  Fig 5: Driver Side Junction Block Terminal Voltage Specification (Left Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  If the value is not as specified the vehicle may be defective. In this case, inspect the harness, connector and fuse between the ECU and battery, then repair or replace it if necessary.