DRL Relay Circuit

LIGHTING SYSTEM: DRL Relay Circuit

DRL Relay Circuit

DESCRIPTION

When all of the following conditions are met, the daytime running light (dimmed high beam headlight) comes on.

- Ignition switch is in ON position.

- Engine is running.

- Low beam headlight is OFF

- Parking brake switch is OFF.

When both of the following conditions are met, the high beam headlight comes on.

- Low beam headlight is ON.

- Dimmer switch is in HIGH position.

WIRING DIAGRAM









INSPECTION PROCEDURE

PROCEDURE

1. CHECK VEHICLE CONDITION
Result:





B -- INSPECT RELAY (DRL NO. 2, DRL NO. 3 AND DRL NO. 4)
A -- Continue to next step.
2. INSPECT RELAY (DRL NO. 2 AND DRL NO. 3)





(a) Inspect the DRL No. 2 relay.
(1) Remove the DRL No. 2 relay from the engine room relay block.
(2) Measure the resistance according to the value(s) in the table below.
Standard resistance:









(b) Inspect the DRL No. 3 relay.
(1) Remove the DRL No. 3 relay from the engine room relay block.
(2) Measure the resistance according to the value(s) in the table below.
Standard resistance:





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





(a) Remove the daytime running light resistor.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPLACE DAYTIME RUNNING LIGHT RESISTOR
OK -- Continue to next step.
4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
(a) Disconnect the 2C connector from the instrument panel junction block assembly.





(b) Using a service wire, connect 2C-23 of the wire harness side and body ground.
OK:
Daytime running light (dimmed high beam headlight) comes on.
NG -- INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
(a) Measure the voltage between the terminal on the wire harness side and body ground.





Standard voltage:





OK -- CHECK HARNESS AND CONNECTOR (BATTERY - DRL NO. 2 RELAY TERMINAL 3)
NG -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (BATTERY - DRL NO. 2 RELAY TERMINAL 1)





(a) Remove the DRL No. 2 relay from the engine room relay block.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - DRL NO. 2 RELAY TERMINAL 1)
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - DRL NO. 2 RELAY TERMINAL 2)
7. CHECK HARNESS AND CONNECTOR (BATTERY - DRL NO. 2 RELAY TERMINAL 3)





(a) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (DRL NO. 2 RELAY TERMINAL 5 - BULB LH)
(a) Disconnect the 2C connector from the instrument panel junction block assembly.





(b) Using a service wire, connect 2C-23 of the wire harness side and body ground.





(c) Disconnect the H1 bulb connector.
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. CHECK HARNESS AND CONNECTOR (BULB LH - BULB RH)





(a) Disconnect the H3 bulb connector
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
10. CHECK HARNESS AND CONNECTOR (BULB RH - DRL NO. 3 RELAY TERMINAL 3)
(a) Remove the DRL No. 3 relay.





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





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (DRL NO. 3 RELAY TERMINAL 4 - DRL RESISTOR)





(a) Disconnect the D13 daytime running light resistor connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (DRL NO. 3 RELAY TERMINAL 4 - DRL RESISTOR)
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (DRL RESISTOR - BODY GROUND)
12. INSPECT RELAY (DRL NO. 2, DRL NO. 3 AND DRL NO. 4)





(a) Inspect the DRL No. 2 and DRL No. 4 relays.
(1) Remove the DRL No. 2 relay and DRL No. 4 relay from the engine room relay block.
(2) Measure the resistance according to the value(s) in the table below.
Standard resistance:









(b) Inspect the DRL No. 3 relay.
(1) Remove the DRL No. 3 relay from the engine room relay block.
(2) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPLACE RELAY
OK -- Continue to next step.
13. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
(a) Disconnect the 2C connector from the instrument panel junction block assembly.





(b) Using a service wire, connect 2C-10 of the wire harness side and body ground.
(c) Using a service wire, connect 2C-23 of the wire harness side and body ground.
OK:
High beam headlight comes on.
NG -- INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
14. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
(a) Measure the voltage between the terminal on the wire harness side and body ground.





Standard voltage:





OK -- CHECK HARNESS AND CONNECTOR (BATTERY - DRL NO. 2 RELAY TERMINAL 3)
NG -- Continue to next step.
15. CHECK HARNESS AND CONNECTOR (BATTERY - DRL NO. 2 RELAY TERMINAL 1)
(a) Remove the DRL No. 3 relay.





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





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - DRL NO. 2 RELAY TERMINAL 1)
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - DRL NO. 2 RELAY TERMINAL 2)
16. CHECK HARNESS AND CONNECTOR (BATTERY - DRL NO. 2 RELAY TERMINAL 3)





(a) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
17. CHECK HARNESS AND CONNECTOR (DRL NO. 2 RELAY TERMINAL 5 - DRL NO. 3 RELAY TERMINAL 5)
(a) Disconnect the 2C connector from the instrument panel junction block assembly.





(b) Using a service wire, connect 2C-10 of the wire harness side and body ground.
(c) Using a service wire, connect 2C-23 of the wire harness side and body ground.
(d) Remove the DRL No. 3 relay.





(e) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
18. CHECK HARNESS AND CONNECTOR (DRL NO. 2 RELAY AND DRL NO. 3 RELAY - BULB)





(a) Disconnect the H1 and H3 bulb connectors
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
19. CHECK HARNESS AND CONNECTOR (BULB - DRL NO. 4 RELAY TERMINAL 3)
(a) Remove the DRL No. 3 relay.





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





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (BULB - DRL NO. 4 RELAY TERMINAL 3)
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (DRL NO. 4 RELAY TERMINAL 5 - BODY GROUND)