DRL Relay Circuit

LIGHTING: LIGHTING SYSTEM: DRL Relay Circuit
- DRL Relay Circuit

SYSTEM DESCRIPTION

The main body ECU controls the DRL relay.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (DAYTIME RUNNING LIGHT)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Turn the tester on.

(d) Enter the following menus: Body Electrical / Body / Active Test/ Daytime Running Light.

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

Body (Main Body ECU):





OK:

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

NG -- INSPECT FUSE (DRL FUSE)

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

2. INSPECT FUSE (DRL FUSE)

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

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

Standard resistance:





(c) Reinstall the DRL fuse.

NG -- REPLACE FUSE
OK -- Continue to next step.

3. INSPECT DAYTIME RUNNING LIGHT RELAY

(a) Remove the DRL relay from the No. 4 engine room relay block.





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

Standard resistance:





(c) Reinstall the DRL relay.

NG -- REPLACE DAYTIME RUNNING LIGHT RELAY
OK -- Continue to next step.

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

(a) Remove the DRL relay from the No. 4 engine room relay block.





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

Standard voltage:





(c) Reinstall the DRL relay.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

(a) Remove the DRL relay from the No. 4 engine room relay block.





(b) Disconnect the 1B main body ECU connector.

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

Standard resistance:





(d) Reinstall the DRL relay.

(e) Reconnect the main body ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

(a) Remove the DRL relay from the No. 4 engine room relay block.





(b) Disconnect the A23 and A24 headlight connectors.

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

Standard resistance:





(d) Reinstall the DRL relay.

(e) Reconnect the headlight connectors.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures