Toyota RAV4 (XA40) 2013-2018 Service Manual: 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
Inspection procedure
- Read value of intelligent tester (ig power supply)
- Connect the intelligent tester (with can vim) to the dlc3.
- Turn the ignition switch on.
- Select the item "ig supply" in the data list and read the value displayed on the intelligent tester.
- 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 harness and connector (battery - power steering ecu)
- Disconnect the e18 and a1 power steering ecu connectors.
- Measure the voltage of the wire harness side connectors.
Standard voltage
Replace power steering ecu
Ecu malfunction
Description
Inspection procedure
If the power steering ecu detects these dtcs, it will shut off the motor
relay circuit (built into the power
steering ecu) and stop power assist. However, pow ...
Pig power supply voltage malfunction
Description
When a problem occurs in the system, the power source relay circuit is shut
off to stop the power assist.
Wiring diagram
Inspection procedure
Read value of intelligent ...
Other materials:
Hazard warning switch circuit
Description
When the hazard warning signal switch is turned on, the turn signal flasher
relay (marking: flsh) in the
main body ecu turns on to flash the hazard warning signal lights.
Wiring diagram
Inspection procedure
Perform active test by intelligent tester
Connect the intelli ...
Open in can main wire
Description
There may be an open circuit in the can main wire and / or the dlc3 branch
wire when the resistance
between terminals 6 (canh) and 14 (canl) of the dlc3 is 69 ù or more.
Wiring diagram
Inspection procedure
Notice:
Turn the ignition switch off before measuring th ...
Evaporator temperature sensor circuit
Description
The no. 1 Cooler thermistor (evaporator temperature sensor) is installed on
the evaporator in the air
conditioning unit to detect the temperature of the cooled air that has passed
through the evaporator and to
control the air conditioner. It sends signals to the air conditioni ...
