Toyota RAV4 (XA40) 2013-2018 Service Manual: Turn signal light circuit
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
the turn signal lights to
flash.
Wiring diagram

Inspection procedure
- Check operation of turn signal light
- When the turn signal light switch is operated, check that
the appropriate turn signal light flashes.


- Inspect fuse (ecu-ig2, haz)
- Remove the ecu-ig2 fuse from the instrument panel
junction block.
- Remove the haz fuse from the engine room no. 1 Relay
block.
- Measure the resistance of the fuses.
Standard resistance:
below 1 

- Check wire harness (battery - turn signal flasher relay)

- Disconnect the ib instrument panel junction block
connector.
- Remove the turn signal flasher relay from the instrument
panel junction block.
- Measure the voltage of the wire harness side
connectors.
Standard voltage 

- Inspect headlight dimmer switch
- Remove the headlight dimmer switch.
- Inspect the turn signal switch.
- Measure the resistance of the switch.
Standard resistance 

- Check wire harness (headlight dimmer switch - instrument panel
junction block)

- Remove the turn signal flasher relay.
- Disconnect the e15 headlight dimmer switch connector.
- Measure the resistance of the wire harness side
connectors and junction block.
Standard resistance 

Replace turn signal flasher relay
- Inspect front turn signal light
- Remove the front turn signal light.
- Connect the positive (+) lead from the battery to terminal
1 and the negative (-) lead to terminal 2, then check that
the light comes on.
Ok:
light comes on.

- Check wire harness (instrument panel junction block - front turn
signal light)

- Disconnect the a12 and a24 front turn signal light
connectors.
- Disconnect the ib instrument panel junction block
connector.
- Measure the resistance of the wire harness side
connectors.
Standard resistance 

Repair or replace harness and connector (front turn signal light - body
ground)
- Inspect rear turn signal light

- Remove the rear combinationl light.
- Connect the positive (+) lead from the battery to terminal
5 and the negative (-) lead to terminal 1, then check that
the light comes on.
Ok:
light comes on.

- Check wire harness (instrument panel junction block - rear turn
signal light)

- Disconnect the k12 and k14 rear combination light
connectors.
- Disconnect the ia instrument panel junction block
connector.
- Measure the resistance of the wire harness side
connectors.
Standard resistance 

Repair or replace harness and connector (rear turn signal light - body
ground)
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 ...
Description
When the hazard warning signal switch is turned on, the turn signal flasher
relay (marking: flsh) in the
main body ecu turns on to flash the hazard warning signal lights.
Wiring diagr ...
Other materials:
Precaution
If any of following conditions are met,
keep engine idling with a/c on (engine
speed at less than 2000 rpm) for at least 1
minute:
Refrigerant gas has been refilled or a/c parts have
been replaced.
A long time has elapsed since the engine was
stopped.
Notice:
If the engine s ...
Security indicator light circuit
Description
When the transponder key is registered, the transponder key ecu indicates the
key registration condition
by lighting up, blinking or turning off the security indicator.
Wiring diagram
Inspection procedure
Perform active test by intelligent tester (security indicator light)
...
Data list / active test
Read data list
Hint:
Using the intelligent tester's data list allows switch,
sensor, actuator and other item values to be read without
removing any parts. Reading the data list early in
troubleshooting is one way to save time.
Connect the intelligent tester to the dlc3.
Turn the igni ...