Toyota RAV4 manuals

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

Toyota RAV4. Taillight relay circuit


Toyota RAV4. Taillight relay circuit


Inspection procedure

  1. Check whether lights illuminate

  1. 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





  1. Inspect fuse (tail)

  1. Remove the tail fuse from the instrument panel junction block.
  2. Measure the resistance of the fuse.

Standard resistance: below 1




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

Toyota RAV4. Check wire harness (battery - instrument panel junction block)


  1. Disconnect the ig instrument panel junction block connector.
  2. Measure the voltage of the wire harness side connector.

Standard voltage




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

Toyota RAV4. Check wire harness (main body ecu - headlight dimmer switch)


  1. Disconnect the e15 main body ecu connector.
  2. Disconnect the e12 headlight dimmer switch connector.
  3. Measure the resistance of the wire harness side connectors.

Standard resistance




  1. Check wire harness (battery - headlight dimmer switch)

Toyota RAV4. Check wire harness (battery - headlight dimmer switch)


  1. Connect the e15 main body ecu connector.
  2. Disconnect the e12 headlight dimmer switch connector.
  3. Measure the voltage of the wire harness side connector.

Standard voltage




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

Toyota RAV4. Check wire harness (headlight dimmer switch - body ground)


  1. Disconnect the e12 headlight dimmer switch connector.
  2. Measure the resistance of the wire harness side connector.

Standard resistance




  1. Inspect headlight dimmer switch

Toyota RAV4. Inspect headlight dimmer switch


  1. Remove the headlight dimmer switch.
  2. Measure the resistance of the switch.

Standard resistance




Replace instrument panel junction block

  1. Check instrument panel junction block (taillight relay)

Toyota RAV4. Check instrument panel junction block (taillight relay)


  1. Disconnect the ib instrument panel junction block connector.
  2. Measure the voltage of the junction block.

Standard voltage




  1. 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)


  1. Disconnect the a12 and a24 front side marker light connectors.
  2. Measure the voltage and resistance of the wire harness side connectors.

Standard resistance


standard resistance




Replace bulb

  1. Check wire harness (main body ecu - rear combination light)

Toyota RAV4. Check wire harness (main body ecu - rear combination light)

  1. Disconnect the k12 and k14 rear combination light connectors.
  2. Measure the voltage and resistance of the wire harness side connectors.

Standard voltage


Standard resistance




Replace rear combination light

  1. 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)


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

Standard voltage


Standard resistance




Replace bulb

  1. Check wire harness (main body ecu - rear combination light)

Toyota RAV4. Check wire harness (main body ecu - rear combination light)


  1. Disconnect the k12 and k14 rear combination light connectors.
  2. Measure the voltage and resistance of the wire harness side connectors.

Standard voltage


Standard resistance




Replace bulb

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