Toyota RAV4 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


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.


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

- Check wire harness (battery - instrument panel junction block)

- Disconnect the ig instrument panel junction block
connector.
- Measure the voltage of the wire harness side connector.
Standard voltage

- Check wire harness (main body ecu - headlight dimmer switch)

- 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 

- Check wire harness (battery - headlight dimmer switch)

- 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 

- Check wire harness (headlight dimmer switch - body ground)

- Disconnect the e12 headlight dimmer switch connector.
- Measure the resistance of the wire harness side
connector.
Standard resistance 

- Inspect headlight dimmer switch

- Remove the headlight dimmer switch.
- Measure the resistance of the switch.
Standard resistance 

Replace instrument panel junction block
- Check instrument panel junction block (taillight relay)

- Disconnect the ib instrument panel junction block
connector.
- Measure the voltage of the junction block.
Standard voltage 

- Check wire harness (taillight relay - front side
marker light and body ground)

- Disconnect the a12 and a24 front side marker light
connectors.
- Measure the voltage and resistance of the wire harness
side connectors.
Standard resistance 
standard resistance 

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 

Replace rear combination light
- Check wire harness (main body ecu - license plate light and body
ground)

- Disconnect the q6 license plate light connector.
- Measure the voltage and resistance of the wire harness
side connector.
Standard voltage
Standard resistance 

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 

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:
Occupant classification system malfunction
Description
The occupant classification system circuit consists of the center airbag
sensor and the occupant
classification system.
When the center airbag sensor receives signals from the occupant classification
ecu, it determines
whether or not the front passenger airbag, front seat side ...
Brake
General maintenance
Inspect brake lines and hoses
Hint:
Work in a well-lighted area. Turn the front wheels fully to
the right or left before beginning the inspection.
Using a mirror, check the entire circumference and
length of the brake lines and hoses for:
Damage
Wear
...
Bleeding
Hint:
If any work is performed on the brake system or if air in the
brake lines is suspected, bleed air from the brake system.
Notice:
Wash off brake fluid immediately if it comes in contact
with any painted surface.
Remove cowl top ventilator louver bracket lh
Detach the 6 claws and ...