Inspection Procedure

NOTE: When using Techstream to troubleshoot the LIN communication line: Connect Techstream to the vehicle, and turn the courtesy light switch on and off at 1.5 second intervals until communication between the tester and vehicle begins.

READ VALUE USING TECHSTREAM (LIN COMMUNICATION)

Use the Data List to check the function of the power window regulator master switch.

Connect Techstream to the DLC3.
Turn the ignition switch ON and turn the tester on.
Read the indication displayed on the tester.

Main body

DATA LIST

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Communication D-Door Motor	Connection status between power window regulator motor assembly (driver side) and main body ECU / OK or Stop	OK: Connection Stop: No connection	-

OK:

OK is displayed on Techstream screen.

NG: GO TO ENGINE IMMOBILISER SYSTEM (B2785)

OK: GO TO NEXT STEP

CHECK OPERATION FUNCTION AFTER IGNITION SWITCH IS TURNED OFF

Check the power window operation function after the ignition switch is turned off.

Result

RESULT CHART

Status	Proceed to
When power window can still be operated even after opening driver door and passenger door within approximately 45 seconds of ignition switch being turned off	A
When power window can still be operated even after approximately 45 seconds have elapsed after ignition switch turned off	B

B: REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Side)

A: GO TO NEXT STEP

READ VALUE USING TECHSTREAM (DOOR COURTESY LIGHT SWITCH)

Use the Data List to check the driver side door courtesy switch signal.

Connect Techstream to the DLC3.
Turn the ignition switch ON and turn the tester on.
Read the indication displayed on the tester.

Main body

DATA LIST

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
D Door Courtesy SW	Driver side door courtesy switch signal / ON or OFF	ON: Driver door open OFF: Driver door closed	-
P Door Courtesy SW	Front passenger side door courtesy switch signal / ON or OFF	ON: Front passenger door open OFF: Front passenger door closed	-

OK:

OK is displayed on Techstream screen.

OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)

NG: GO TO NEXT STEP

INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY

Fig 1: Inspecting Front Door Courtesy Light Switch Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the switch.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
1 - Switch body	Pushed	10 kΩ or higher
1 - Switch body	Not pushed	Below 1 Ω

NG: REPLACE DOOR COURTESY LIGHT SWITCH ASSEMBLY

OK: GO TO NEXT STEP

CHECK INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)

Measure the voltage without removing the IA, IC junction block connector.

Standard voltage:

for Driver side

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Driver Door Condition	Specified Condition
IA-21 (DCTY) - Body ground	Fully closed	10 to 14 V
IA-21 (DCTY) - Body ground	Open	Below 1 V

for Passenger side

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Driver Door Condition	Specified Condition
IC-14 (PCTY) - Body ground	Fully closed	10 to 14 V
IC-14 (PCTY) - Body ground	Open	Below 1 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 2: Identifying Instrument Panel Junction Block Connectors

OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)