Toyota RAV4 (XA40) 2013-2018 Service Manual: Taillight relay circuit
Description
When the light control switch, located on the headlight dimmer switch, is
turned to the tail position, the
taillight relay (marking: t-lp) turns on to illuminate the front side marker
lights, rear taillights, side marker
lights and license plate light.
Wiring diagram
![Toyota RAV4. Taillight relay circuit](images/books/256/48/3.htm54.jpg)
![Toyota RAV4. Taillight relay circuit](images/books/256/48/3.htm55.jpg)
Inspection procedure
- Check whether lights illuminate
- Check whether the following lights illuminate: front side
marker lights, rear taillights, side marker lights and
license plate light.
![Toyota RAV4. Check whether lights illuminate](images/books/256/48/3.htm56.jpg)
![](images/books/256/48/3.htm59.gif)
- Inspect fuse (tail)
- Remove the tail fuse from the instrument panel junction
block.
- Measure the resistance of the fuse.
Standard resistance:
below 1 ![](images/books/256/48/3.htm60.gif)
![](images/books/256/48/3.htm62.gif)
- Check wire harness (battery - instrument panel junction block)
![Toyota RAV4. Check wire harness (battery - instrument panel junction block)](images/books/256/48/3.htm63.jpg)
- Disconnect the ig instrument panel junction block
connector.
- Measure the voltage of the wire harness side connector.
Standard voltage
![](images/books/256/48/3.htm66.gif)
- Check wire harness (main body ecu - headlight dimmer switch)
![Toyota RAV4. Check wire harness (main body ecu - headlight dimmer switch)](images/books/256/48/3.htm67.jpg)
- Disconnect the e15 main body ecu connector.
- Disconnect the e12 headlight dimmer switch connector.
- Measure the resistance of the wire harness side
connectors.
Standard resistance ![](images/books/256/48/3.htm68.jpg)
![](images/books/256/48/3.htm70.gif)
- Check wire harness (battery - headlight dimmer switch)
![Toyota RAV4. Check wire harness (battery - headlight dimmer switch)](images/books/256/48/3.htm71.jpg)
- Connect the e15 main body ecu connector.
- Disconnect the e12 headlight dimmer switch connector.
- Measure the voltage of the wire harness side connector.
Standard voltage ![](images/books/256/48/3.htm72.jpg)
![](images/books/256/48/3.htm74.gif)
- Check wire harness (headlight dimmer switch - body ground)
![Toyota RAV4. Check wire harness (headlight dimmer switch - body ground)](images/books/256/48/3.htm75.jpg)
- Disconnect the e12 headlight dimmer switch connector.
- Measure the resistance of the wire harness side
connector.
Standard resistance ![](images/books/256/48/3.htm76.jpg)
![](images/books/256/48/3.htm78.gif)
- Inspect headlight dimmer switch
![Toyota RAV4. Inspect headlight dimmer switch](images/books/256/48/3.htm79.jpg)
- Remove the headlight dimmer switch.
- Measure the resistance of the switch.
Standard resistance ![](images/books/256/48/3.htm80.jpg)
![](images/books/256/48/3.htm82.gif)
Replace instrument panel junction block
- Check instrument panel junction block (taillight relay)
![Toyota RAV4. Check instrument panel junction block (taillight relay)](images/books/256/48/3.htm83.jpg)
- Disconnect the ib instrument panel junction block
connector.
- Measure the voltage of the junction block.
Standard voltage ![](images/books/256/48/3.htm84.jpg)
![](images/books/256/48/3.htm86.gif)
- Check wire harness (taillight relay - front side
marker light and body ground)
![Toyota RAV4. Check wire harness (taillight relay - front side marker light and body ground)](images/books/256/48/3.htm87.jpg)
- Disconnect the a12 and a24 front side marker light
connectors.
- Measure the voltage and resistance of the wire harness
side connectors.
Standard resistance ![](images/books/256/48/3.htm88.jpg)
standard resistance ![](images/books/256/48/3.htm89.jpg)
![](images/books/256/48/3.htm91.gif)
Replace bulb
- Check wire harness (main body ecu - rear combination light)
- Disconnect the k12 and k14 rear combination light
connectors.
- Measure the voltage and resistance of the wire harness
side connectors.
Standard voltage
Standard resistance ![](images/books/256/48/3.htm94.jpg)
![](images/books/256/48/3.htm96.gif)
Replace rear combination light
- Check wire harness (main body ecu - license plate light and body
ground)
![Toyota RAV4. Check wire harness (main body ecu - license plate light and body ground)](images/books/256/48/3.htm97.jpg)
- Disconnect the q6 license plate light connector.
- Measure the voltage and resistance of the wire harness
side connector.
Standard voltage
Standard resistance ![](images/books/256/48/3.htm99.jpg)
![](images/books/256/48/3.htm2.gif)
Replace bulb
- Check wire harness (main body ecu - rear combination light)
![Toyota RAV4. Check wire harness (main body ecu - rear combination light)](images/books/256/48/3.htm3.jpg)
- Disconnect the k12 and k14 rear combination light
connectors.
- Measure the voltage and resistance of the wire harness
side connectors.
Standard voltage
Standard resistance ![](images/books/256/48/3.htm5.jpg)
![](images/books/256/48/3.htm7.gif)
Replace bulb
Description
The main body ecu receives information regarding the door courtesy switch and
door lock position
switch, and turns on the room light.
Wiring diagram
Inspection procedure
Perf ...
Components
Removal
Hint:
Use the same procedures for the rh and lh sides.
The procedures listed below are for the lh side.
Disconnect cable from negative battery
terminal
Rem ...
Other materials:
Automatic transmission
Select the shift position
depending on your purpose
and situation.
Shift position purpose
and functions
P - Parking the vehicle/
starting the engine
R - Reversing
N - Neutral
D - Normal driving*1
S - S mode driving*2
*1:Shifting to the D position allows
the system to select a gear suitable
for ...
Rear brake flexible hose
Installation
Hint:
Use the same procedures for the lh side and rh side.
The procedures listed below are for the lh side.
Install rear brake tube flexible hose
Notice:
The gasket and union bolt must be used as a set, as
shown in the illustration.
Connect the flexible hose wi ...
Diagnosis system
Description
Air conditioning system data and the diagnostic
trouble codes (dtcs) can be read through the
data link connector 3 (dlc3) of the vehicle. When
the system seems to be malfunctioning, use the
intelligent tester to check for malfunctions and
perform troubleshooting.
...