Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota FJ Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST USING TECHSTREAM (DAYTIME RUNNING LIGHT)

Connect the Techstream to the DLC3.
Turn the ignition switch ON.
Turn the tester on.
Enter the following menus: Body Electrical / Body / Active Test/ Daytime Running Light.

Check the headlight (Low-beam) while operating the daytime running light relay using the tester.

Body (Main Body ECU)

BODY (MAIN BODY ECU)

Tester Display	Test Part	Control Range	Normal Condition
Daytime Running Light	DRL Relay	ON/OFF	-

OK: The headlight (low-beam) comes on when operating it through the Techstream.

NG: Go to step 2

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

INSPECT FUSE (DRL FUSE)

Remove the DRL fuse from the No. 2 engine room relay block.

Measure the resistance according value(s) in the table below.

Standard resistance

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
DRL fuse	Always	Below 1 Ω

Reinstall the DRL fuse.

NG: REPLACE FUSE

OK: Go to next step.

INSPECT DAYTIME RUNNING LIGHT RELAY

Remove the DRL relay from the No. 4 engine room relay block.

Fig 1: Identifying Daytime Running Light Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according value(s) in the table below.

Standard resistance

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
3 - 5	Voltage is not applied between terminals 1 and 2	10 kΩ or higher
3 - 5	Apply the battery voltage between terminals 1 and 2	Below 1 Ω

Reinstall the DRL relay.

NG: REPLACE DAYTIME RUNNING LIGHT RELAY

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (BATTERY - DAYTIME RUNNING LIGHT RELAY)

Remove the DRL relay from the No. 4 engine room relay block.

Fig 2: Identifying DRL Relay Of No. 4 Engine Room Relay Block

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage according value(s) in the table below.

Standard voltage

STANDARD VOLTAGE

Tester connection	Condition	Specified Condition
DRL relay terminal 1 - Body round	Light control switch is in HEAD position	11 to 14 V
DRL relay terminal 1 - Body round	Light control switch is in OFF or TAIL position	Below 1 V

Reinstall the DRL relay.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (DAYTIME RUNNING LIGHT RELAY - MAIN BODY ECU)

Remove the DRL relay from the No. 4 engine room relay block.
Disconnect the 1B main body ECU connector.

Fig 3: Checking Harness And Connector (Daytime Running Light Relay - Main Body ECU)

Measure the resistance according value(s) in the table below.

Standard resistance

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
DRL relay terminal 2 - 1B-3 (H-ON)	Always	Below 1 Ω
DRL relay terminal 2 or 1B-3 (H-ON) - Body ground	Always	10 kΩ or higher

Reinstall the DRL relay.
Reconnect the main body ECU connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (DAYTIME RUNNING LIGHT RELAY - HEADLIGHT, BODY GROUND)

Remove the DRL relay from the No. 4 engine room relay block.
Disconnect the A23 and A24 headlight connectors.

Fig 4: Checking Harness And Connector (Daytime Running Light Relay - Headlight, Body Ground)

Measure the resistance according value(s) in the table below.

Standard resistance

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
DRL relay terminal 3 - A23-3	Always	Below 1 Ω
DRL relay terminal 3 or A23-3 - Body ground	Always	10 kΩ or higher
DRL relay terminal 3 - A24-3	Always	Below 1 Ω
DRL relay terminal 3 or A24-3 - Body ground	Always	10 kΩ or higher
DRL relay terminal 5 - Body ground	Always	Below 1 Ω

Reinstall the DRL relay.
Reconnect the headlight connectors.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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