Terminals Of Ecu

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

INSPECT INSTRUMENT PANEL J/B ASSY (MULTIPLEX NETWORK BODY ECU)

Fig 1: Identifying Terminals Of ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the B6 ECU connector.
Disconnect the 1C, 1K and 1L J/B connectors.
Check the voltage and resistance between each terminal of the wire harness side connectors and body ground.
Standard:

Fig 2: Terminal Symbol Specified Condition Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the B6 ECU connector.

Reconnect the 1C, 1K and 1L J/B connectors, and check the voltage between the terminal of the connector and body ground.

Standard:

TERMINAL SYMBOL SPECIFIED CONDITION

Symbols (Terminal No.)	Wiring Color	Condition	Specified Condition
DCTY (B9-14) - Body ground	R-Y - Body ground	Drive side door CLOSED --> OPEN	10 to 14V --> 0V

If the result is not as specified, the J/B assy (body ECU) may have a malfunction.