Terminals Of Ecu

Fig 1: Checking Power Window Regulator Master Switch Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the P9 switch connector.
2. Measure the voltage and resistance of the wire harness side connector.

   Standard: 

   TERMINAL DESCRIPTION CHART
   
   

   Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
   B (P9-10) - Body ground	B - Body ground	+B power supply	Always	10 to 14 V
   IG (P9-20) - Body ground	R - Body ground	Ignition power supply	Ignition switch OFF -> ON	Below 1 V -> 10 to 14 V
   GND (P9-2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   L (P9-4) - Body ground	R - Body ground	Door control switch door lock input	Door control switch OFF -> LOCK	10 kΩ or higher -> Below 1 Ω
   U (P9-14) - Body ground	P - Body ground	Door control switch door unlock input	Door control switch OFF -> UNLOCK	10 kΩ or higher -> Below 1 Ω

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

HINT:

After disconnecting the P9 switch connector, be sure to reconnect it and then reset the power window motor (See INITIALIZATION ).

Fig 2: Checking Instrument Panel J/B Assembly (Integration Relay)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the 1A, 1B, 1E, 1G and 1H J/B connectors.
2. Disconnect the I6 relay connector.
3. Measure the voltage and resistance of the wire harness side connectors.

   Standard: 

   TERMINAL DESCRIPTION CHART
   
   

   Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
   ALTB (1G-1) - Body ground	W - Body ground	+B (power system, generator system) power supply	Always	10 to 14 V
   ECUB (1B-30) - Body ground	V - Body ground	+ B (ECUB) power supply	Always	10 to 14 V
   GND (1E-17) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   KSW (1E-26) - Body ground	B - Body ground	Key unlock warning switch input	No key in ignition key cylinder -> key inserted	10 kΩ or higher -> Below 1 Ω
   L1 (1H-13) - Body ground	GR - Body ground	Driver side door control switch lock input	Driver side door control switch OFF -> LOCK	10 kΩ or higher -> Below 1 Ω
   UL1 (1H-14) - Body ground	V - Body ground	Driver side door control switch unlock input	Driver side door control switch OFF -> UNLOCK	10 kΩ or higher -> Below 1 Ω
   L1 (1H-4) - Body ground	L - Body ground	Passenger side door control switch lock input	Passenger side door control switch OFF -> LOCK	10 kΩ or higher -> Below 1 Ω
   UL1 (1H-5) - Body ground	B - Body ground	Passenger side door control switch lock input	Passenger side door control switch OFF -> UNLOCK	10 kΩ or higher -> Below 1 Ω
   L2 (1H-16) - Body ground	L - Body ground	Driver side door key-linked door lock input	Driver side door key cylinder OFF -> LOCK	10 kΩ or higher -> Below 1 Ω
   UL3 (I6-18) - Body ground	P - Body ground	Driver side door key-linked door unlock input	Driver side door key cylinder OFF -> UNLOCK	10 kΩ or higher -> Below 1 Ω
   LSWD (I6-20) - Body ground	W - Body ground	Driver side door lock position switch input	Driver side door UNLOCkΩ LOCK	10 kΩ or higher -> Below 1 Ω
   L2 (1H-7) - Body ground	O - Body ground	Passenger side door key linked door lock input	Passenger side door key cylinder OFF -> LOCK	10 kΩ or higher -> Below 1 Ω
   UL2 (1H-6) - Body ground	LG - Body ground	Passenger side door key linked door unlock input	Passenger side door key cylinder OFF -> UNLOCK	10 kΩ or higher -> Below 1 Ω
   DCTY (1A-21) - Body ground	O - Body ground	Driver side courtesy switch input	Driver side door closed -> open	10 kΩ or higher -> Below 1 Ω
   BCTY (1A-7) - Body ground	V - Body ground	Back door courtesy switch input	Back door closed -> open	10 kΩ or higher -> Below 1 Ω
   BDSU (I6-19) - Body ground	O - Body ground	Back door opener switch input	Back door opener switch OFF -> ON	10 kΩ or higher -> Below 1 Ω

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

4. Reconnect the 1A, 1B, 1E, 1G and 1H J/B connectors.
5. Reconnect the I6 relay connector.
6. Measure the voltage of the connectors.

   Standard: 

   Fig 3: Wiring Symbol Terminal Description Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   If the result is not as specified, the J/B (integration relay) may have a malfunction.