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
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:
Basic inspection
When measuring resistance of
electronic parts
Unless otherwise stated, all resistance
measurements should be made at an ambient
temperature of 20°c (68°f). Resistance
measurements may be inaccurate if measured
at high temperatures, i.E. Immediately after the
vehicle has been r ...
Transmitter id
Description
The tire pressure warning valve and transmitter that is installed in the
tires and wheels measures the air
pressure of the tires. The measured values are transmitted to the tire pressure
warning receiver on the
body as radio waves and then sent to the tire pressure warning ecu ...
Evaporative emission system switching valve control
Dtc summary
Hint:
The vent valve is built into the canister pump module.
Description
The description can be found in the evap (evaporative emission) system (see
page es-335).
Inspection procedure
Refer to the evap system (see page es-340).
Monitor description
5 Hours* after the ign ...