Toyota RAV4 (XA40) 2013-2018 Service Manual: Headlight relay circuit
Description
When the light control switch, located on the headlight dimmer switch, is turned to the head position, the head relay illuminates the headlights.
Wiring diagram
Inspection procedure
- Perform active test by intelligent tester (headlight)
- Connect the intelligent tester (with can vim) to the dlc3.
- Turn the ignition switch on and press the intelligent tester main switch on.
- Select the item below in the active test and then check the relay operation.
Ok: headlight comes on
- Inspect fuse (head ll, head rl)
- Remove the head ll fuse and head rl fuse from the engine room no. 2 Relay block.
- Measure the resistance of the fuses.
Standard resistance:
below 1 
- Inspect headlight relay (marking: head)
- Remove the headlight relay from the engine room no. 2 Relay block.
- Measure the resistance of the relay.
Standard resistance 
- Inspect bulb (headlight bulb)
- Remove the headlight bulbs (low).
- Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, then check that the bulb illuminates.
Ok: bulb illuminates.
- Check wire harness (main body ecu - battery)
- Disconnect the e15 main body ecu connector.
- Measure the voltage of the wire harness side connector.
Standard voltage 
- Check instrument panel junction block (main body ecu)
- Measure the voltage of the main body ecu.
Standard voltage 
Repair or replace harness and connector (head relay - headlight bulb and body ground)
- Check wire harness (headlight dimmer switch - main body ecu)
- Disconnect the e17 main body ecu connector.
- Disconnect the e12 headlight dimmer switch connector.
- Measure the resistance of the wire harness side connectors.
Standard resistance
- Inspect headlight dimmer switch
- Disconnect the e12 headlight dimmer switch.
- Measure the resistance of the switch.
Standard resistance 
Repair or replace harness and connector (headlight dimmer switch - body ground)
Stop light switch circuit
Description
When the stop light switch is turned on, current flows to the stop lights to
illuminate them.
Wiring diagram
Inspection procedure
Inspect fuse (stop)
Remove the stop fus ...
Drl relay circuit
Description
The main body ecu controls the daytime running light no. 2 Relay (marking:
drl no.2).
Wiring diagram
Inspection procedure
Inspect daytime running light relay (marking: drl no. ...
Other materials:
Cold start
Description
The electronic throttle control system (etcs) controls the engine idling
speed. The etcs operates the
throttle actuator to open and close the throttle valve, and adjusts the intake
air amount to achieve the
target idling speed.
In addition, the ecm retards the ignition timi ...
Daytime running light relay
On-vehicle inspection
Inspect day time running light relay
Remove the no. 2 Relay, no. 3 Relay and no. 4 Relay
from the engine room no. 2 Relay block.
Measure the resistance of the relays.
Standard resistance:
No. 2, No. 4
No. 3
If the result is not as specified, replace th ...
