Toyota RAV4 manuals

Toyota RAV4 Service Manual: Eps warning light circuit

Description

If the power steering ecu detects a malfunction, the p/s warning light comes on. At this time, the power steering ecu stores a dtc in its memory.

Wiring diagram

Toyota RAV4. Eps warning light circuit


Inspection procedure

  1. Check for dtc

  1. Using the intelligent tester (with can vim), check for dtcs and confirm that there are no problems in the can communication system.

Ok: can dtcs are not output.


  1. Read value of intelligent tester (ig power supply)

  1. Connect the intelligent tester (with can vim) to the dlc3.
  2. Turn the ignition switch on and press the intelligent tester main switch on.
  3. Select the item "ig supply" in the data list and read the value displayed on the intelligent tester.

Main body ecu




  1. Inspect fuse (ecu-ig1)

  1. Remove the ecu-ig1 fuse from the instrument panel junction block.
  2. Measure the resistance of the fuse.

Ok: below 1




  1. Check wire harness (battery - power steering ecu and body ground)

Toyota RAV4. Check wire harness (battery - power steering ecu and body ground)


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

Standard voltage



  1. Perform active test by intelligent tester

  1. Connect the intelligent tester (with can vim) to the dlc3.
  2. Turn the ignition switch on and press the intelligent tester main switch on.
  3. Operate the intelligent tester according to the steps on the display and select the active test.

Combination meter


Ok: indicator comes on.



Replace power steering ecu

Control module communication bus off
Description The power steering ecu receives signals from the ecm and the skid control ecu via the can communication system. Hint: When 2 or more dtcs starting with [u] are output simul ...

Steering gear
Components Removal Position front wheels facing straight ahead Disconnect cable from negative battery terminal Caution: Wait at least 90 seconds after disconnecting the cable f ...

Other materials:

Terminals of ecu
Check instrument panel junction block (main body ecu) Disconnect the ib and ie junction block connectors. Measure the voltage and resistance of the wire harness side connectors. Reconnect the ib and ie junction block connector. Measure the voltage of the wire harness ...

Dtc check / clear
Check dtc (using sst (check wire)) Check the dtcs (present trouble code). Turn the ignition switch on, and wait for approximately 60 seconds. Using sst, connect terminals 13(tc) and 4(cg) of the dlc3. Sst 09843-18040 Notice: Connect the terminals to the correct positio ...

If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs adjustment or repair. Contact your toyota dealer as soon as possible. Visible symptoms Fluid leaks under the vehicle (water dripping from the air conditioning after use is normal.) Flat-looking tires or uneven tire w ...

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