Terminals Of Ecu

CHECK POWER WINDOW REGULATOR MASTER SWITCH

Fig 1: Identifying Power Window Regulator Master Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage and resistance of the wire harness side connector.

Standard:

VOLTAGE AND RESISTANCE SPECIFICATIONS

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
B (H5-9) - Body ground	W - Body ground	Ignition power supply	Ignition switch OFF	Below 1 V
B (H5-9) - Body ground	W - Body ground	Ignition power supply	Ignition switch ON	11 to 14 V
E (H5-1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

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

Measure the voltage of the connector.

Standard voltage:

STANDARD VOLTAGE SPECIFICATIONS

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
U (H5-3) - E (H5-1)	L-W-B	Power window motor UP output	Ignition switch ON, driver side power window switch OFF → UP (manual operation)	Below 1 V → 11 to 14 V
D (H5-4) - E (H5-1)	L-B - W-B	Power window motor DOWN output	Ignition switch ON, driver side power window switch OFF → DOWN (manual operation)	Below 1 V → 11 to 14 V
D (H5-4) - E (H5-1)	L-B - W-B	Power window motor DOWN output	Ignition switch ON, driver side power window fully closed → driver side power window switch DOWN (AUTO operation) → driver side power window fully open	Below 1 V → 11 to 14 V → Below 1 V

If the result is not as specified, the master switch may have a malfunction.

Check the AUTO light illumination.
1. After turning the ignition switch ON, check that the AUTO light illuminates (amber).