Terminals Of Ecu

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU)

Fig 1: Checking Instrument Panel Junction Block Assy (Multiplex Network Body ECU)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the 1C, 1J, 1L, 1K, 1P, B6, B7 and B9 J/B connectors.
2. Check the voltage and resistance between each terminal of the wire harness side connectors and the body ground.
  Standard:
  
  Fig 2: Checking Voltage And Resistance Between Terminal Of Wire Harness Side Connectors And Body Ground Table (Disconnect Connectors)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  * w/o Power back door
  
  If the result is not as specified, there may be a malfunction on the wire harness side.
3. Reconnect the connectors, and check the voltage between each terminal of the connectors and the body ground.
  Standard:
  
  Fig 3: Checking Voltage And Resistance Between Terminal Of Wire Harness Side Connectors And Body Ground Table (Reconnect Connectors)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  * w/o Power Back Door
  
  HINT:
  
  Use an oscilloscope to check the output voltages of the terminals LSWD, LSWP, LSWL and LSWR.
  
  If the result is not as specified, the J/B assy (body ECU) may have a malfunction.
w/ Power back door:
CHECK POWER BACK DOOR ECU

Fig 4: Identifying Power Back Door ECU (With Power Back Door)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the P13 and P14 ECU connectors, and check the voltage or resistance of each terminal of the wire harness side connectors.
  Standard:
  
  Fig 5: Checking Voltage Or Resistance Of Each Terminal Of Power Back Door (W/Power Back Door) (Disconnect Connectors)
  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 ECU connectors, and check the voltage of each terminal of the connectors.
  Standard:
  
  Fig 6: Checking Voltage Or Resistance Of Each Terminal Of Power Back Door (W/Power Back Door (Reconnect Connectors)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, the ECU may have a malfunction.