Toyota RAV4 Quiz
Power steering

Ig power supply voltage malfunction

In this manual: Power steering
Introduction — 37Interior — 12Exterior — 432Az-fe engine mechanical — 1552Az-fe ignition — 182Az-fe charging — 232Az-fe emission control — 82az-fe exhaust — 32Az-fe fuel — 72Az-fe lubrication — 4Brake — 17Brake control — 63U140f automatic transaxle — 59Instrument panel — 8Suspension — 18Drive shaft — 23Axle — 6Tire and wheel — 30Air conditioning — 93Lighting — 45Cruise control — 21Differential — 12Door lock — 31Engine immobiliser — 21Horn — 5Can communication — 27Mirror — 5Parking brake — 5Power steering — 27Propeller shaft — 3Seat — 29Seat belt — 27Sliding roof — 25Steering column — 6Wiper and washer — 11Supplemental restraint system — 95Other system — 5Maintenance — 14
9steps
~54min
2/5difficulty
Done 0 of 9
Toyota RAV4. Ig power supply voltage malfunction

Description

The power steering ecu distinguishes the ignition switch status as on or off through the ig power source circuit.


Wiring diagram
Toyota RAV4. Ig power supply voltage malfunction

Inspection procedure
  1. Read value of intelligent tester (ig power supply)
  2. Connect the intelligent tester (with can vim) to the dlc3.
  3. Turn the ignition switch on.
  4. Select the item "ig supply" in the data list and read the value displayed on the intelligent tester.
    Toyota RAV4. Read value of intelligent tester (ig power supply)


  1. Inspect fuse (ecu-ig1)
  2. Remove the ecu-ig1 fuse from the instrument panel junction block.
  3. Measure the resistance of the fuse.
Ok: below 1


  1. Check harness and connector (battery - power steering ecu)
Toyota RAV4. Check harness and connector (battery - power steering ecu)

  1. Disconnect the e18 and a1 power steering ecu connectors.
  2. Measure the voltage of the wire harness side connectors.
Standard voltage


Replace power steering ecu

Test yourself

A quick Toyota RAV4 quiz: every answer comes with an explanation and a link to the manual page.