Drl relay circuit

The main body ecu controls the daytime running light no. 2 Relay (marking: drl no.2).

1. Inspect daytime running light relay (marking: drl no. 2, Drl no. 3, Drl no. 4)

1. 1
   Remove the no. 2 Relay, no. 3 Relay and no. 4 Relay from the engine room no. 2 Relay block.
2. 2
   Measure the resistance of the relays.

No. 2, No. 4

No. 3

1. 1
   Inspect fuse (head lh)
2. 2
   Remove the head lh fuse from the engine room no. 2 Relay block.
3. 3
   Measure the resistance of the fuse.

Standard resistance: below 1

3. Inspect headlight bulb (high)

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

   

   

4. Check wire harness (battery - no. 2 Daytime running light relay)

1. 1
   Remove the no. 2 Daytime running light relay from the engine room no. 2 Relay block.
2. 2
   Measure the voltage of the relay block.

Standard voltage

5. Check wire harness (no. 2 Daytime running light relay - headlight bulb and body ground)

1. 1
   Remove the no. 2 Daytime running light relay from the engine room no. 2 Relay block.
2. 2
   Disconnect the a14 and a22 headlight (high) connectors.
3. 3
   Measure the resistance of the wire harness side connectors and relay block.

Standard resistance

6. Check wire harness (main body ecu - battery)

1. 1
   Disconnect the e16 main body ecu connector.
2. 2
   Measure the voltage of the wire harness side connector.

Standard voltage