Toyota RAV4 (XA40) 2013-2018 Service Manual: 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 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:
front fog light comes on.

- Check taillight
- Check that the taillight comes on when the light control
switch is on (tail).
Ok:
taillight comes on.

- Inspect fuse (fr fog)
- Remove the fr fog fuse from the instrument panel
junction block.
- Measure the resistance of the fuses.
Standard resistance:
below 1 

- Inspect fog light bulb

- Remove the fog light bulb.
- 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.

- Inspect front fog light relay (marking: fr fog)

- Remove the front fog light relay from the no. 6 Relay
block.
- Measure the resistance of the relay.
Standard resistance 

- Check wire harness (battery - main body ecu)

- Disconnect the e17 ecu connector.
- Measure the voltage of the wire harness side connector.
Standard voltage 

- Check wire harness (front fog light relay - battery)

- Remove the front fog light relay from the no. 6 Relay
block.
- Measure the voltage of the relay block.
Standard voltage 

- Check wire harness (front fog light relay - front fog light and body
ground)

- Remove the front fog light relay from the no. 6 Relay
block.
- Disconnect the a11 and a28 front fog light connectors.
- Measure the resistance of the wire harness side
connectors.
Standard resistance 

Replace instrument panel junction block (main body ecu)
- Check wire harness (dimmer switch - main body ecu and body ground)

- Disconnect the e12 headlight dimmer switch connector.
- Disconnect the e17 main body ecu connector.
- Measure the resistance of the wire harness side
connectors.
Standard resistance 

- Inspect fog light 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)
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
I ...
Description
The turn signal flasher relay (marking: flsh) in the main body ecu turns on
when it receives signals
from the headlight dimmer switch integrated with the turn signal switch, causing
...
Other materials:
Adjustment procedure
To select a mirror to adjust,
press the switch.
Left
Right
To adjust the mirror, press the
switch.
Up
Right
Down
Left
...
Installation
Notice:
Do not heat the vehicle body, emblem and name plate
excessively.
Hint:
When installing the emblem and name plate, heat the vehicle
body, emblem and name plate using a heat light.
Standard heating temperature
Install no. 4 Back door name plate (for 4wd)
Clean the vehicle body ...
Garage door opener
The garage door opener can
be programmed using the
HomeLink to operate
garage doors, gates, entry
doors, door locks, home
lighting systems, security
systems, and other devices.
â– HomeLink programming procedure
The programming procedures can
also be found at the following URL.
System components
The ...