Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

Connect the intelligent tester to DLC3.
Turn the ignition switch ON and push the intelligent tester main switch ON.
Select the item below in the ACTIVE TEST and then check that the relay operates.

Body:

ACTIVE TEST TABLE

Item	Test Details	Diagnostic Note
DRL RLY	(Test Details) Turns DRL relay in the turn signal flasher ON/OFF (Vehicle Condition) IG switch is ON, Engine is stopped and light control switch is in OFF position.	-

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

NG: Go to next step.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (DRL)

Fig 1: Identifying Instrument Panel Junction Block Assembly Connector Terminals (DRL)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the connector.

Measure the voltage between terminal DRL of the instrument panel J/B assembly (driver side J/B assembly) and body ground on the wire harness side.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
B3-7 (DRL) - Ground	Engine is running	10 to 14 V

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

NG: Go to next step.

INSPECT TURN SIGNAL FLASHER ASSEMBLY

Fig 2: Identifying Turn Signal Flasher Assembly Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the connector.
Measure the voltage between terminals on the wire harness side as shown in the table below.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
9 (E) - Ground	Always	Continuity
1 (IG) - Ground	Turn ignition switch ON	Battery positive voltage
1 (IG) - Ground	Turn ignition switch OFF	No voltage
6 (B) - Ground	Always	Battery positive voltage

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.

INSPECT TURN SIGNAL FLASHER ASSEMBLY

Fig 3: Identifying Turn Signal Flasher Assembly Connector Terminal

Connect the connector to the turn signal flasher and turn the ignition switch to ON, and inspect the wire harness side connector on the back side as shown in the table.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
12 (DRL) - Ground	Turn ignition switch ON and engine OFF → ON	10 to 14 V → 0 V

NG: REPLACE TURN SIGNAL FLASHER ASSEMBLY

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR