Toyota RAV4 manuals

Toyota RAV4 Service Manual: Brake switch "A" / "B" correlation

Toyota RAV4. Brake switch "a" / "b" correlation


Description

The stop light switch is a duplex system that transmits two signals: stp and st1-. These two signals are used by the ecm to monitor whether or not the brake system is working properly. If the signals, which indicate the brake pedal is being depressed and released, are detected simultaneously, the ecm interprets this as a malfunction in the stop light switch and sets the dtc.

Hint:

The normal conditions are as shown in the table below. The signals can be read using the intelligent tester.

Toyota RAV4. Brake switch "a" / "b" correlation


Wiring diagram

Toyota RAV4. Wiring diagram


Inspection procedure

Hint:

  1. Connect the intelligent tester to the dlc3.
  2. Turn the ignition switch on.
  3. Turn the tester on.
  4. Select the following menu items: diagnosis / enhanced obd ii / data list / primary / stop light sw.
  5. Check the stp signal when the brake pedal is depressed and released.

Toyota RAV4. Inspection procedure


  1. Check stop light switch assembly (terminal b voltage)

  1. Disconnect the a3 stop light switch connector.
  2. Turn the ignition switch on.
  3. Measure the voltage between the terminals of the a3 stop light switch connector and body ground.

Standard voltage


  1. Reconnect the stop light switch connector.



  1. Inspect stop light switch assembly

  1. Remove the stop light switch.
  2. Check the resistance.

Standard resistance


  1. Reinstall the stop light switch.


  1. Check ecm (stp and st1 - voltage)

  1. Disconnect the a9 ecm connector.
  2. Turn the ignition switch on.
  3. Measure the voltage between the terminals st1- and stp of the a9 ecm connector and body ground.

standard voltage


  1. Reconnect the ecm connector.

 


  1. Inspect fuse (stop and ign fuse)

  1. Remove the stop and ign fuses from the instrument panel junction block.
  2. Measure the resistance.

Standard resistance: below 1


  1. Reinstall the stop and ign fuses.




Vehicle speed sensor "A"
description The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ecu. The skid control ecu converts these wheel speed signals into a 4-pulse signal ...

Idle control system malfunction
Description The idling speed is controlled by the etcs (electronic throttle control system). The etcs is comprised of: 1) the one valve type throttle body; 2) the throttle actuator, which op ...

Other materials:

No signal from transmitter id
Description The tire pressure warning valve and transmitter constantly sends radio waves to the tire pressure warning ecu. Under the following conditions, the tire pressure warning antenna and receiver is unable to receive the signals from the tire pressure warning valve and transmitte ...

Rear combination light assembly
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 Caution: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal t ...

Removal
Discharge fuel system pressure (see page fu-9) Disconnect cable from negative battery terminal Caution: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation. Remove radiator support op ...

В© 2011-2023 Copyright www.trav4.net