Toyota RAV4 manuals

Toyota RAV4 Service Manual: Downhill assist control operation switch (test mode dtc)

Toyota RAV4 Service Manual / Brake control / Vehicle stability control system / Downhill assist control operation switch (test mode dtc)

Toyota RAV4. Downhill assist control operation switch (test mode dtc)


Description

The downhill assist control switch is connected to the skid control ecu in the abs and traction actuator.

Dtc c1379/74 can be detected when the downhill assist control switch sends the downhill assist control switch signal or test mode ends. Dtc c1379/74 is output only in test mode.

Toyota RAV4. Downhill assist control operation switch (test mode dtc)


Wiring diagram

Refer to downhill assist control switch circuit (see page bc-157).

Inspection procedure

Notice:

When replacing the abs and traction actuator, perform zero point calibration (see page bc-24).

  1. Check wire harness (skid control ecu - body ground)

Toyota RAV4. Check wire harness (skid control ecu - body ground)


  1. Disconnect the a19 ecu.
  2. Measure the resistance of the wire harness side connector.

Standard resistance




  1. Inspect downhill assist control switch

Toyota RAV4. Inspect downhill assist control switch


  1. Remove the downhill assist control switch.
  2. Measure the resistance of the switch.

Standard resistance




  1. Check wire harness (skid control ecu - downhill assist control switch)

Toyota RAV4. Check wire harness (skid control ecu - downhill assist control switch)


  1. Disconnect the a19 ecu connector.
  2. Disconnect the e31 switch connector.
  3. Measure the resistance of the wire harness side connectors.

Standard resistance




Replace abs and traction actuator assembly

Stop light control relay malfunction

Toyota RAV4. Stop light control relay malfunction


Description

The skid control ecu inputs the stop light switch signal and detects the status of the brake operation.

Toyota RAV4. Stop light control relay malfunction


Wiring diagram

Toyota RAV4. Wiring diagram


Inspection procedure

Notice:

When replacing the abs and traction actuator, perform zero point calibration (see page bc-24).

  1. Check stop light (operation)

  1. Check that the light illuminates when the brake pedal is depressed, and turns off when the brake pedal is released.

Ok




  1. Check wire harness (skid control ecu - battery)

Toyota RAV4. Check wire harness (skid control ecu - battery)


  1. Disconnect the a19 ecu connector.
  2. Measure the voltage of the wire harness side connector.

Standard voltage




  1. Check wire harness (skid control ecu)

  1. Disconnect the a19 ecu connector.
  2. Measure the resistance of the wire harness side connector

Standard resistance


Toyota RAV4. Check wire harness (skid control ecu)




  1. Perform active test by intelligent tester (stop light relay)

  1. Select the active test, generate a control command, and then check that the stop light relay operates.

Toyota RAV4. Perform active test by intelligent tester (stop light relay)


Ok: the stop lights illuminate or turn off.



  1. Reconfirm dtc

  1. Clear the dtc (see page bc-47).
  2. Start the engine.
  3. Drive the vehicle at a speed of 5 km/h (3 mph) or more for several seconds.
  4. Check if the same dtc is output (see page bc-47).

Result




Replace abs and traction actuator assembly

  1. Inspect stop light control relay (marking: brk)

Toyota RAV4. Inspect stop light control relay (marking: brk)


  1. Remove the stop light control relay from the engine room no. 1 Relay block.
  2. Measure the resistance of the relay.

Standard resistance




  1. Check wire harness (engine room no. 1 Relay block - skid control ecu and battery)

Toyota RAV4. Check wire harness (engine room no. 1 Relay block - skid control ecu and battery)


  1. Remove the stop light control relay.
  2. Disconnect the a19 ecu connector.
  3. Measure the voltage of the wire harness side connector.

Standard voltage


  1. Measure the resistance of the wire harness side connector.

Standard resistance




  1. Reconfirm dtc

  1. Clear the dtc (see page bc-47).
  2. Start the engine.
  3. Drive the vehicle at a speed of 5 km/h (3 mph) or more for several seconds.
  4. Check if the same dtc is output (see page bc-47).

Result




Replace abs and traction actuator assembly

  1. Check wire harness (stop light switch - battery)

Toyota RAV4. Check wire harness (stop light switch - battery)


  1. Disconnect the a3 switch connector.
  2. Measure the voltage of the wire harness side connector.

Standard voltage




  1. Inspect stop light switch assembly

Toyota RAV4. Inspect stop light switch assembly


  1. Remove the stop light switch connector.
  2. Measure the resistance of the switch.

Standard resistance




  1. Check wire harness (stop light switch - stop light control relay)

Toyota RAV4. Check wire harness (stop light switch - stop light control relay)


  1. Disconnect the a3 switch connector.
  2. Remove the stop light control relay.
  3. Measure the resistance of the wire harness side connectors.

Standard resistance




  1. Inspect stop light control relay (marking: brk)

Toyota RAV4. Inspect stop light control relay (marking: brk)


  1. Remove the stop light control relay from the engine room no. 1 Relay block.
  2. Measure the resistance of the relay.

Standard resistance




  1. Check wire harness (stop light and rear combination light - control relay)

Toyota RAV4. Check wire harness (stop light and rear combination light - control relay)


  1. Disconnect the q1, k12 and k14 light connectors.
  2. Remove the stop light control relay.
  3. Measure the resistance of the wire harness side connectors.

Standard resistance




Check for intermittent problems

Different diameter tire malfunction
Description The skid control ecu measures the speed of each wheel by receiving signals from the speed sensor. These signals are used for recognizing that all 4 wheels are operating properly. ...

Control module communication bus off
Description Inspection procedure The skid control ecu inputs the signals from the ecm, steering angle sensor, and yaw rate and acceleration sensor via can communication system. Ch ...

Other materials:

On-vehicle inspection
Check steering pad assembly (vehicle not involved in collision and airbag not deployed) Perform a diagnostic system check (see page rs- 49). With the steering pad (with airbag) installed on the vehicle, perform a visual check: check for cuts, cracks or discoloration on the ...

Warning lights and indicators
The warning lights and indicators on the instrument cluster and center panel inform the driver of the status of the vehicle’s various systems. For the purpose of explanation, the following illustration displays all warning lights and indicators illuminated. Instrument cluster Some indi ...

Inner rear view mirror
Components Removal Remove inner rear view mirror assembly Disengage the 2 claws and separate the inner rear view mirror cover as shown in the illustration. Remove the inner rear view mirror as shown in the illustration. Installation Install inner rear view mir ...

© 2011-2019 Copyright www.trav4.net