Toyota RAV4 (XA40) 2013-2018 Service Manual: Check 4wd control ecu (for 4wd)
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 are not in operation.
- Before measuring the resistance, leave the vehicle as
is for at least 1 minute and do not operate the ignition
switch, any other switches or the doors. If doors need
to be opened in order to check connectors, open the
doors and leave them open.
Hint:
Operating the ignition switch, any other switches or the doors
triggers related ecu and sensor communication with the
can, which causes resistance variation.
- Junction connector
- No. 1 Junction connector


- No. 2 Junction connector


- No. 3 Junction connector


- No. 4 Junction connector


Hint:
*: For 4wd
- Check dlc3

- Measure the resistance of the connector.

- Check abs and traction actuator (skid control ecu)

- Disconnect the a19 ecu connector.
- Measure the resistance of the wire harness side
connector.

- Check steering angle sensor

- Disconnect the e11 sensor connector.
- Measure the resistance of the wire harness side
connector.

- Check yaw rate sensor

- Disconnect the k6 sensor connector.
- Measure the resistance of the wire harness side
connector.

- Check air conditioning amplifier (for automatic air conditioning
system)

- Disconnect the e37 amplifier connector.
- Measure the resistance of the wire harness side
connector.
- Check air conditioning amplifier (for manual air conditioning system)

- Disconnect the e36 amplifier connector.
- Measure the resistance of the wire harness side
connector.

- Check ecm

- Disconnect the a9 and b30 ecm connectors.
- Measure the resistance of the wire harness side
connectors.
Hint:
*1: For 2az-fe
*2: For 2gr-fe
- Check center airbag sensor assembly

- Disconnect the e45 sensor connector.
- Measure the resistance of the wire harness side
connectors.

- Check power steering ecu

- Disconnect the a1 and e18 ecu connectors.
- Measure the resistance of the wire harness side
connectors.

- Check combination meter ecu

- Disconnect the e19 ecu connector.
- Measure the resistance of the wire harness side
connector.

- Check instrument panel junction block (main body ecu)


- Disconnect the 1b and 1e junction block
connectors.
- Disconnect the e17 ecu connector.
- Measure the resistance of the wire harness side
connectors.

- Check 4wd control ecu (for 4wd)

- Disconnect the e57 ecu connector.
- Measure the resistance of the wire harness side
connector.

Notice:
Turn the ignition switch off before measuring the
resistances of the main wire and the branch wire.
After the ignition switch is turned off, check that the
key reminder warning syste ...
Bus check
Select "bus check" from the "obd / mobd
menu" screen.
Hint:
The ecus and sensors that are properly connected
to the can communication system can be di ...
Other materials:
Fuel pump control circuit
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
crankshaft position sensor is also
input into the ne+ terminal. Thus, the ecm interprets that the engine is ...
Diagnosis system
Description
Key reminder warning system data can be read
through the data link connector 3 (dlc3) of the
vehicle. When the system seems to be
malfunctioning, use the intelligent tester (with can
vim) to check for malfunctions and perform repairs.
Check dlc3
The vehi ...
Occupant classification ecu malfunction
Description
Dtc b1795 is recorded when a malfunction is detected in the occupant
classification ecu.
Troubleshoot dtc b1771 first when dtc b1771 and b1795 are output simultaneously.
Wiring diagram
Inspection procedure
Check for dtc
Turn the ignition switch on, and wait ...