Toyota RAV4 (XA40) 2013-2018 Service Manual: Headlight (hi-beam) circuit
Description
The body ecu controls the headlight relay, no. 2 Daytime running light relay (marking: drl no. 2) And no. 4 Daytime running light relay (marking: drl no. 4).
Wiring diagram
Inspection procedure
- Perform active test by intelligent tester
- Connect the intelligent tester (with can vim) to the dlc3.
- Turn the ignition switch to the on position and press the intelligent tester main switch on.
- Select the item below in the active test and then check the relay operation.
Ok: headlight (high) comes on.
- Check headlight (low)
- Check that the headlight (low) comes on when the light control switch is on (head).
Ok: headlight (low) comes on.
- Inspect fuse (head lh, head rh)
- Remove the head lh fuse and head rh fuse from the engine room no. 2 Relay block.
- Measure the resistance of the fuses.
Standard resistance:
below 1 
- Inspect daytime running light relay (marking: drl no. 2, Drl no. 3, Drl no. 4)
- 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 
- Inspect headlight bulb (high)
- Remove the headlight bulb (high).
- Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, then check that the bulb illuminates.
- Check wire harness (main body ecu - battery)
- Disconnect the e16 main body ecu connector.
- Measure the voltage of the wire harness side connector.
Standard voltage 
- Check wire harness (main body ecu)
- Remove the headlight relay from the engine room no. 2 Relay block.
- Disconnect the e15 main body ecu connector.
- Measure the voltage of the wire harness side connector.
Standard voltage 
- Check wire harness (headlight relay - no. 3 Daytime running light relay and body ground)
- Remove the no. 3 Daytime running light relay from the engine room no. 2 Relay block.
- Measure the voltage and resistance of the relay block.
Standard voltage 
Standard resistance 
- Check wire harness (battery - no. 2 Daytime running light relay, bulb and body ground)
- Remove the no. 2 Daytime running light relay from the engine room no. 2 Relay block.
- Remove the a14 and a22 headlight bulb connectors.
- Measure the voltage and resistance of the relay block.
Standard voltage 
Standard resistance 
Replace instrument panel junction block (main body ecu)
- Check wire harness (main body ecu - dimmer switch)
- Disconnect the e15 main body ecu connector.
- Disconnect the e12 headlight dimmer switch connector.
- Disconnect the ij instrument panel junction block connector.
- Measure the resistance of the wire harness side connectors.
Standard resistance 
- Inspect headlight dimmer switch
- Remove the headlight dimmer switch.
- Measure the resistance of the switch.
Standard resistance 
Repair or replace harness and connector (headlight dimmer switch - body ground)
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. ...
Front fog light circuit
Description
The main body ecu controls the front fog light relay (marking: fr fog) when a
signal is received from
the headlight dimmer switch.
Wiring diagram
Inspection procedure
Perform ...
Other materials:
Purpose of readiness tests
The on-board diagnostic (obd ii) system is designed to
monitor the performance of emission related components,
and indicate any detected abnormalities with dtc
(diagnostic trouble codes). Since various components
need to be monitored during different driving conditions,
the obd ii syste ...
Cleaning and protecting the vehicle exterior
Perform the following to
protect the vehicle and
maintain it in prime condition:
Cleaning instructions
Working from top to bottom,
liberally apply water to the
vehicle body, wheel wells and
underside of the vehicle to
remove any dirt and dust.
Wash the vehicle body using
a sponge or soft clo ...
Evaporator temperature sensor circuit
Description
The no. 1 Cooler thermistor (evaporator temperature sensor) is installed on
the evaporator in the air
conditioning unit to detect the temperature of the cooled air that has passed
through the evaporator and to
control the air conditioner. It sends signals to the air conditioni ...
