Toyota RAV4 (XA40) 2013-2018 Service Manual: Vc output circuit
Description
The ecm constantly generates 5 v power from the battery voltages supplied to
the +b (batt) terminal to
operate the microprocessor. The ecm also provides this power to the sensors
through the vc output
circuit.
![Toyota RAV4. Vc output circuit](images/books/256/18/1.htm115.jpg)
When the vc circuit is short-circuited, the microprocessor in the ecm and
sensors that are supplied with
power through the vc circuit are inactivated because the power is not supplied
from the vc circuit. Under
this condition, the system does not start up and the mil does not illuminate
even if the system
malfunctions.
Hint:
Under normal conditions, the mil is illuminated for several seconds when the
ignition switch is first turned
on. The mil goes off when the engine is started.
Wiring diagram
![Toyota RAV4. Wiring diagram](images/books/256/18/1.htm116.jpg)
Inspection procedure
- Check mil
- Check that the malfunction indicator lamp (mil) lights
up when turning the ignition switch on.
Ok:
mil lights up
![](images/books/256/18/1.htm73.gif)
- Check communication between intelligent tester and ecm
- Connect the intelligent tester to the dlc3.
- Turn the ignition switch on and tester on.
- Check the communication between the tester and ecm.
![Toyota RAV4. Check communication between intelligent tester and ecm](images/books/256/18/1.htm117.jpg)
![](images/books/256/18/1.htm76.gif)
- Check mil (throttle position sensor)
- Disconnect the b3 throttle body connector.
- Turn the ignition switch on.
- Check the mil.
![Toyota RAV4. Check mil (throttle position sensor)](images/books/256/18/1.htm118.jpg)
- Reconnect the throttle body connector.
![](images/books/256/18/1.htm80.gif)
- Check mil (accelerator pedal position sensor)
- Disconnect the a4 accelerator pedal position sensor
connector.
- Turn the ignition switch on.
- Check the mil.
![Toyota RAV4. Check mil (accelerator pedal position sensor)](images/books/256/18/1.htm119.jpg)
- Reconnect the accelerator pedal position sensor
connector.
![](images/books/256/18/1.htm83.gif)
- Check mil (canister pump module)
![Toyota RAV4. Check mil (canister pump module)](images/books/256/18/1.htm120.jpg)
- Disconnect the s3 canister pump module connector.
- Turn the ignition switch on.
- Check the mil.
![Toyota RAV4. Check mil (canister pump module)](images/books/256/18/1.htm121.jpg)
- Reconnect the canister pump module connector.
![](images/books/256/18/1.htm86.gif)
- Check mil (battery current sensor)
- Disconnect the b29 battery current sensor connector.
- Turn the ignition switch on.
- Check the mil.
![Toyota RAV4. Check mil (battery current sensor)](images/books/256/18/1.htm122.jpg)
- Reconnect the battery current sensor connector.
![](images/books/256/18/1.htm90.gif)
- Check harness and connector
- Disconnect the b3 throttle body connector.
- Disconnect the a4 accelerator pedal position sensor
connector.
- Disconnect the s3 canister pump module connector.
- Disconnect the b29 battery current sensor connector.
- Disconnect the a9 and b30 ecm connectors.
- Measure the resistance.
Standard resistance (check for short)
![](images/books/256/18/1.htm123.jpg)
- Reconnect the throttle body connector.
- Reconnect the accelerator pedal position sensor
connector.
- Reconnect the canister pump module connector.
- Reconnect the battery current sensor connector.
- Reconnect the ecm connectors.
![](images/books/256/18/1.htm91.gif)
Description
When the ignition switch is turned on, the battery voltage is applied to the
igsw of the ecm. The output
signal from the mrel terminal of the ecm causes a current to flow to the coil, ...
Description
When the engine is cranked, the starter relay drive signal output from the
star terminal of the ecm is
input into the sta terminal of the ecm, and ne signal generated by the
cranksha ...
Other materials:
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 ...
When closing the back door
Lower the back door using the
back door handle.
Vehicles without a power back
door
Make sure to push the back door
down from the outside to close it.
Vehicles with a power back
door
The back door closing assist will
activate, and the back door will
fully close automatically.
...
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 ...