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: Identifying Instrument Panel Junction Block & Related Harness Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the B6 ECU connector.
2. Disconnect the IB, IC, ID, IE and IH instrument panel junction block connectors.
3. Check the voltage or continuity of each terminal of the wire harness side connectors.
  
  Fig 2: Instrument Panel Junction Block 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.
4. Reconnect the B6 ECU connector.
5. Reconnect the IB, IC, ID, IE and IH instrument panel junction block connectors.
6. Check the voltage of each terminal of the connectors.
Fig 3: Instrument Panel Junction Block Specifications (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, the instrument panel junction block (body ECU) may malfunction.