Toyota RAV4 (XA40) 2013-2018 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
Inspection procedure
- Check for dtc
- 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.
- Read value of intelligent tester (ig power supply)
- Connect the intelligent tester (with can vim) to the dlc3.
- Turn the ignition switch on and press the intelligent tester main switch on.
- Select the item "ig supply" in the data list and read the value displayed on the intelligent tester.
Main body ecu
- Inspect fuse (ecu-ig1)
- Remove the ecu-ig1 fuse from the instrument panel junction block.
- Measure the resistance of the fuse.
Ok:
below 1 
- Check wire harness (battery - power steering ecu and body ground)
- Disconnect the a1 and e18 power steering ecu connector.
- Measure the voltage of the wire harness side connectors.
Standard voltage
- Perform active test by intelligent tester
- Connect the intelligent tester (with can vim) to the dlc3.
- Turn the ignition switch on and press the intelligent tester main switch on.
- 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:
Cd player operation
Insert disc or select “cd” on the audio source selection screen
with a disc inserted to begin listening to a cd.
Audio control screen
Pressing the “audio” button displays the audio control screen from
any screens of the selected source.
Audio source selection screen
appears
Displ ...
Ecm communication stop mode (2006/01- )
Description
Wiring diagram
Inspection procedure
Notice:
Turn the ignition switch off before measuring the resistances of the
main wire and branch
wire.
After the ignition switch is turned off, check that the key reminder
warning system and light
reminder warning system ...
Back door lock
Inspection
Inspect back door with motor lock assembly
Apply the battery voltage to the door lock motor and
check the operation of the door lock motor.
Ok
If the result is not as specified, replace the door lock
assembly. ...
