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:
Fuel pressure pulsation damper
Components
Removal
Discharge fuel system pressure (see page
fu-9)
Disconnect cable from negative battery
terminal
Remove no. 1 Engine cover (see page es-410)
Remove air cleaner cap sub-assembly (see
page es-411)
Disconnect fuel main tube (see page fu-10)
Remove fuel pres ...
Front wiper motor
Inspection
Inspect front wiper motor
Check the lo operation.
Connect the battery's positive (+) lead to
terminal 5 (+1) and the negative (-) lead to
terminal 4 (e), and check that the front wiper
motor operates at low speed (lo).
Ok:
front wiper motor operates at low sp ...
Rear window and outside rear view mirror defoggers
These features are used to defog the rear window, and to
remove raindrops, dew and frost from the outside rear view mirrors
(if equipped).
Vehicles with a manual air conditioning system
On/off
The defoggers will automatically
turn off after approximately 15 minutes.
Vehicles with an au ...
