Toyota RAV4 manuals

Toyota RAV4 Service Manual: Solenoid circuit

Toyota RAV4. Solenoid circuit


Description

This solenoid is turned on in accordance with signals from the skid control ecu and controls the pressure on the wheel cylinders to control the braking force.

The solenoid and solenoid relay are built into the abs and traction actuator.

Toyota RAV4. Solenoid circuit


Hint:

Dtcs c0226/21, c0236/22, c0246/23, c0256/24 and c1225/25: the skid control ecu begins to detect these dtcs when the vehicle speed exceeds 6 km/h (4 mph).

Wiring diagram

Toyota RAV4. Wiring diagram


Inspection procedure

  1. Reconfirm dtc

  1. Clear the dtc(s) (see page bc-47).
  2. Start the engine.
  3. Drive the vehicle at 6 km/h (4 mph) or more to activate the initial check.
  4. Check if the same dtc(s) is output (see page bc-47).

Result 


Hint:

The dtcs may be stored due to a malfunction in the connector terminal.



Replace abs and traction actuator

Toyota RAV4. Replace abs and traction actuator


Description

If a dtc related to the motor line is stored, the vsc fail (fail-safe) relay cuts off the power supply to the vsc mtr relay and performs the fail-safe operation.

While the abs, trc, vsc, or ba is operating, the skid control ecu turns the vsc fail relay on and activates the pump motor in the abs and traction actuator.

These dtcs may be stored if the motor relay (+bm) voltage becomes lower than the dtc detecting condition due to insufficient output from the battery or alternator.

Toyota RAV4. Replace abs and traction actuator


Hint:

Dtcs c0273/13, c0274/14 and c1361/91: the skid control ecu begins to detect these dtcs when the vehicle speed exceeds 6 km/h (4 mph).

Wiring diagram

Toyota RAV4. Wiring diagram


Inspection procedure

  1. Perform active test by intelligent tester (motor relay)

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

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


Ok: the operation sound of the abs motor can be heard.



  1. Inspect fuse (abs1)

  1. Remove the abs1 h-fuse from the engine room no. 1 Relay block.
  2. Measure the resistance of the fuse.

Standard resistance: below 1




  1. Inspect vsc motor relay (marking: vsc mtr)

Toyota RAV4. Inspect vsc motor relay (marking: vsc mtr)


  1. Remove the vsc motor relay from the engine room no.

    1 Relay block.

  2. Measure the resistance of the relay.

Standard resistance




  1. Inspect fail-safe relay (marking: vsc fail)

Toyota RAV4. Inspect fail-safe relay (marking: vsc fail)


  1. Remove the faile-safe relay from the engine room no. 1 Relay block.
  2. Measure the resistance of the relay.

Standard resistance




  1. Check wire harness (fail-safe relay - battery)

Toyota RAV4. Check wire harness (fail-safe relay - battery)


  1. Remove the fail-safe relay from the engine room no. 1 Relay block.
  2. Measure the voltage of the wire harness side connector.

Standard voltage




  1. Check engine room no. 1 Relay block (fail-safe relay - vsc motor relay and body ground)

Toyota RAV4. Check engine room no. 1 Relay block (fail-safe relay - vsc motor relay and body ground)


  1. Remove the fail-safe and vsc motor relays from the engine room no. 1 Relay block.
  2. Measure the resistance of the relay terminals.

Standard resistance




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

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


  1. Disconnect the a19 ecu connector.
  2. Remove the fail-safe and vsc motor relays from the engine room no. 1 Relay block.
  3. Measure the resistance of the wire harness connectors.

Standard resistance




  1. Reconfirm dtc

  1. Clear the dtc(s) (see page bc-47).
  2. Start the engine
  3. Drive the vehicle at 6 km/h (4 mph) or more to activate the initial check.
  4. Check if the same dtc(s) is output (see page bc-47).

Result




Replace abs and traction actuator assembly

Diagnostic trouble code chart
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Open in abs solenoid relay circuit
Description The solenoid relay supplies power to the abs solenoid and trc solenoid. After the ignition switch is turned on, the vehicle speed has reached 6 km/h (4 mph) and the solenoid is ...

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