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:
System description
System description
Hint:
The skid control ecu forms a single unit with the abs
and traction actuator.
Abs (anti-lock brake system):
the abs helps prevent the wheels from locking
when the brakes are applied firmly or on a slippery
surface.
Operation description:
the skid ...
Customize parameters
Customizing function with intelligent
tester (reference)
Hint:
The following item can be customized.
Notice:
When the customer requests a change in a
function, first make sure that the function can be
customized.
Make a note of the current settings before
customizing.
When tr ...
Removal
Hint:
Use the same procedures for the rh side and lh side.
The procedures listed below are for the lh side.
Caution:
Be sure to read the precautionary notices concerning the
srs airbag system before servicing it (see page rs-1).
Disconnect cable from negative battery terminal
Cauti ...
