Terminals Of Ecu

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.