Inspection Procedure

READ VALUE OF INTELLIGENT TESTER (MASTER SWITCH)

Using the DATA LIST to check the function of the power window master switch.

Power window regulator motor (Power window ECU)

POWER WINDOW REGULATOR MOTOR - DATA LIST

Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
D P/W AUTO SW	Driver side power window AUTO switch signal / ON or OFF	ON: Driver side power window AUTO switch operates OFF: Driver side power window AUTO switch does not operate	-
D P/W UP SW	Driver side power window UP switch signal / ON or OFF	ON: Driver side power window UP switch operates OFF: Driver side power window UP switch does not operate	-
D P/W DOWN SW	Driver side power window DOWN switch signal / ON or OFF	ON: Driver side power window DOWN switch operates OFF: Driver side power window DOWN switch does not operate	-

OK: ON (switch operates) appears on screen.

HINT:

When the power window operates normally, the problem has been caused by irregular switch operation (for example, the power window regulator master switch was held in the same position for more than 20 seconds).

OK: REPLACE POWER WINDOW REGULATOR MOTOR (for Driver Side)

NG: Go TO NEXT STEP.

CHECK WIRE HARNESS (SWITCH INPUT POWER SUPPLY)

Disconnect the H2 switch connector.

Measure the voltage of the wire harness and connector.

Fig 1: Identifying H2 Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
H2-6 (B) - H2-1 (E)	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go TO NEXT STEP.

CHECK WIRE HARNESS (MASTER SWITCH - REGULATOR MOTOR)

Disconnect the H2 switch connector.
Disconnect the H4 motor connector.

Measure the resistance of the wire harness side connectors.

Fig 2: Identifying H2 Switch Connector And H4 Motor Connector Terminals

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
H2-8 (U) - H4-10 (UP)	Below 1 Ω
H2-5 (D) - H4-7 (DOWN)	Below 1 Ω
H2-4 (A) - H4-4 (AUTO)	Below 1 Ω
H2-3 (LED) - H4-5 (LED)	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go TO NEXT STEP.

REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY
1. Temporarily replace the power window regulator master switch with a new or normally functioning one.
2. Check for DTC.
  OK: DTC is not output.
NG: REPLACE POWER WINDOW REGULATOR MOTOR (for Driver Side)

OK: END