DRL Relay Circuit

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

DESCRIPTION

The main body ECU controls the daytime running light No. 2 relay (Marking: DRL NO.2).

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT DAYTIME RUNNING LIGHT RELAY (Marking: DRL NO. 2, DRL NO. 3, DRL NO. 4)





(a) Remove the No. 2 relay, No. 3 relay and No. 4 relay from the engine room No. 2 relay block.

(b) Measure the resistance of the relays.

Standard resistance:

No. 2, No. 4
No. 3










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

2. INSPECT FUSE (HEAD LH)

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

(b) Measure the resistance of the fuse.

Standard resistance:

Below 1 Ohms

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

3. INSPECT HEADLIGHT BULB (HIGH)





(a) Remove the headlight bulb (high).

(b) Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, then check that the bulb illuminates.

NG -- REPLACE HEADLIGHT BULB (HIGH)
OK -- Continue to next step.

4. CHECK WIRE HARNESS (BATTERY - NO. 2 DAYTIME RUNNING LIGHT RELAY)





(a) Remove the No. 2 daytime running light relay from the engine room No. 2 relay block.

(b) Measure the voltage of the relay block.

Standard voltage:





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

5. CHECK WIRE HARNESS (NO. 2 DAYTIME RUNNING LIGHT RELAY - HEADLIGHT BULB AND BODY GROUND)





(a) Remove the No. 2 daytime running light relay from the engine room No. 2 relay block.

(b) Disconnect the A14 and A22 headlight (HIGH) connectors.

(c) Measure the resistance of the wire harness side connectors and relay block.

Standard resistance:





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

6. CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY)





(a) Disconnect the E16 main body ECU connector.

(b) Measure the voltage of the wire harness side connector.

Standard voltage:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

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