Terminals Of Ecu

CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSY

Disconnect the D12 master switch connector and check the voltage and continuity of each terminal of the wire harness side connector.

Fig 1: Identifying Master Switch Connector D12

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard:

POWER WINDOW REGULATOR MASTER SWITCH - VOLTAGE/CONTINUITY TABLE

Symbols (Terminal No.)	Wiring color	Condition	Specified condition
BW1, B2 (D12-7) <==> Body ground	L-W <==> -	Constant	10 - 14 V
E (D12-1) <==> Body ground	W-B <==> -	Constant	Continuity
SIG (D12-11) <==> Body ground	B-R <==> -	Ignition switch turned to ON from OFF	0 V --> 10 - 14 V

*1: w/ Jam Protection

*2: w/o Jam Protection

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

Reconnect the D12 master switch connector, and check the voltage of each terminal of the connector.

Standard:

POWER WINDOW REGULATOR MASTER SWITCH - VOLTAGE TABLE

Symbols (Terminal No.)	Wiring color	Condition	Specified condition
DU (D12-4) <==> Body ground	G <==> -	Ignition switch ON, driver's side master switch OFF --> UP (Manual operation)	0 V --> 9 V or more
DU (D12-4) <==> Body ground	G <==> -	Ignition switch ON, driver's side door glass fully closed <==> Driver's side master switch UP (Automatic operation) --> Door glass fully closed	0 V --> 9 V or more --> 0 V
DD (D12-9) <==> Body ground	R <==> -	Ignition switch ON, driver's side master switch OFF --> DOWN (Manual operation)	0 V --> 9 V or more
DD (D12-9) <==> Body ground	R <==> -	Ignition switch ON, driver's side door glass fully closed --> Driver's side master switch DOWN (Automatic operation) --> Door glass fully opened	0 V --> 9 V or more --> 0 V

If the result is not as specified, the master switch may be defective.

Check the illumination.
1. When the ignition switch is turned to ON from OFF with the connector connected, check that the illumination (LED) AUTO will light up.