Terminals Of Ecu

WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

Check Instrument Panel Junction Block Assy. (Body ECU)

Fig 1: Locating Instrument Panel Junction Block Assy.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the IB, IE, IF, IH, IK, IL, B4 and B6 J/B connectors, and check the voltage or continuity of each terminal of the vehicle side connectors.
  
  Fig 2: Standard Specifications (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, there may be a malfunction on the wire harness side.
2. Reconnect the J/B connectors IB, IE, IF, IH, IK, IL, B4 and B6, and check the voltage of each terminal of the connectors.
  
  Fig 3: Standard Specifications (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, the vehicle may be defective. In this case, check the harness, connector and fuse between the ECU and battery. Then repair or replace it if necessary.
Check Multiplex Network Door ECU Back (Back Door ECU)

Fig 4: Identifying Multiplex Network Door ECU (Back Door ECU)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the B8 and B9 ECU connectors, and check the voltage or continuity of each terminal of the wire harness side connectors.
  
  Fig 5: Standard Specifications (Disconnect)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, there may be a malfunction on the wire harness side.
2. Reconnect the connectors, and check the voltage of each terminal of the connectors.
  
  Fig 6: Standard Specifications (Reconnect)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, the vehicle may be defective. In this case, check the harness, connector and fuse between the ECU and battery. Then repair or replace it if necessary.