Toyota RAV4 (XA40) 2013-2018 Service Manual: 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 the resistances of the
main wire and the 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 for at least 1
minute and do not operate the
ignition switch, any switches or 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 switches or any doors triggers related ecu
and sensor communication
with the can, which causes resistance variation.
- Check dlc3

- Measure the resistance of the dlc3.
Standard resistance 
Notice:
When the measured value is 132 ù or more and a
can communication system diagnostic trouble code
is output, there may be a fault besides disconnection
of the dlc3 branch wire. For that reason,
troubleshooting should be performed again from
"how to proceed with troubleshooting"
(see page ca-8) after repairing the trouble area.

- Check can main wire for disconnection (no. 2 Junction connector - ecm)

- Disconnect the e68 no. 2 Junction connector.
- Measure the resistance of the wire harness side
connector.
Standard resistance 

- Check can main wire for disconnection (no. 2 Junction connector -
combination meter ecu)

- Measure the resistance of the wire harness side
connector.
Standard resistance 

Replace no. 2 Junction connector
- Connect connector
- Reconnect the e68 no. 2 Junction connector.

- Check can main wire for disconnection (no. 1 Junction connector - ecm)

- Disconnect the a36 no. 1 Junction connector.
- Measure the resistance of the wire harness side
connector.
Standard resistance 

- Check can main wire for disconnection (no. 1 Junction connector - no.
2 Junction connector)

- Measure the resistance of the wire harness side
connector.
Standard resistance 


Replace no. 1 Junction connector
- Connect connector
- Reconnect the a36 no. 1 Junction connector.
- Check can main wire for disconnection (ecm - no. 1 Junction
connector)

- Disconnect the a9 ecm connector.
- Measure the resistance of the wire harness side
connector.
Standard resistance 

Replace ecm
- Connect connector
- Reconnect the e68 no. 2 Junction connector.
- Check can main wire for disconnection (no. 4 Junction connector - no.
2 Junction connector)

- Disconnect the e69 no. 4 Junction connector.
- Measure the resistance of the wire harness side
connector.
Standard resistance 

- Check can main wire for disconnection (no. 4 Junction connector -
combination meter)

- Measure the resistance of the wire harness side
connector.
Standard resistance 

Replace no. 4 Junction connector
- Connect connector
- Reconnect the e69 no. 4 Junction connector.

- Check can main bus line for disconnection (combination meter ecu -
no. 4 Junction connector)

- Disconnect the e19 combination meter ecu connector.
- Measure the resistance of the wire harness side
connector.
Standard resistance 
Replace combination meter assembly (combination meter ecu)
- Connect connector
- Reconnect the e69 no. 4 Junction connector.

- Check can main wire for disconnection (no. 2 Junction connector - no.
3
Junction connector)

- Disconnect the e70 no. 3 Junction connector.
- Measure the resistance of the wire harness side
connector.
Standard resistance 

- Check can main wire for disconnection (no. 3 Junction connector - no.
4 Junction connector)

- Measure the resistance of the wire harness side
connector.
Standard resistance

Replace no. 3 Junction connector
Description
When any dtc for the can communication system is output, first measure the
resistance between the
terminals of the dlc3 to specify the trouble area, and check that there is not a
sho ...
Description
There may be a short circuit between the can bus lines when the resistance
between terminals 6 (canh)
and 14 (canl) of the dlc3 is below 54
.
Wiring diagram
Inspection ...
Other materials:
Multiplex communication circuit
Description
The air conditioning amplifier communicates data with the ecm and combination
meter through the can
communication system.
Wiring diagram
Inspection procedure
Check dtc
Clear the dtc (see page ac-127).
Read the dtc (see page ac-127).
Result
Go to can ...
Ts and cg terminal circuit
Description
If the vehicle is stationary during sensor check mode, speed sensor
malfunctions cannot be detected. The
vehicle must be driven for speed sensor malfunctions to be detected.
Hint:
Change to sensor check mode by connecting terminals tc and cg of the dlc3,
and turning the ignitio ...
Ecu power source circuit
Description
This is the power source for the tire pressure warning ecu.
Wiring diagram
Inspection procedure
Notice:
It is necessary to register an id code after replacing the tire pressure
monitor valve and/or the tire
pressure warning ecu (see page tw-9).
Inspect fuse (ecu-ig1)
...