Toyota RAV4 (XA40) 2013-2018 Service Manual: Short to b+ in can bus line
Description
There may be a short circuit between the can bus line and +b when there is
resistance between
terminals 6 (canh) and 16 (bat) or terminals 14 (canl) and 16 (bat) of the dlc3.
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 can bus line for short to +b (dlc3 branch wire)
- Disconnect the e68 no. 2 Junction connector.
- Measure the resistance of the dlc3.
Standard resistance
- Connect connector
- Reconnect the e68 no. 2 Junction connector.
- Check can bus line for short to +b (no. 1 Junction connector side)
- Disconnect the a36 no. 1 Junction connector.
- Measure the resistance of the dlc3.
Standard resistance
- Connect connector
- Reconnect the a36 no. 1 Junction connector.
- check can bus line for short to +b (no. 3 junction connector, no. 4 junction connector side)
- Disconnect the e70 no. 3 Junction connector.
- Measure the resistance of the dlc3.
Standard resistance
- Connect connector
- Reconnect the e70 no. 3 Junction connector.
- Check can bus line for short to +b (no. 4 Junction connector side)
- Disconnect the e69 no. 4 Junction connector.
- Measure the resistance of the dlc3.
Standard resistance
- Connect connector
- Reconnect the e69 no. 4 Junction connector.
- Check can bus line for short to +b (no. 3 Junction connector - center airbag sensor assembly)
- Disconnect the e70 no. 3 Junction connector.
- Measure the resistance of the wire harness side
connectors.
Standard resistance
- Connect connector
- Reconnect the e70 no. 3 Junction connector.
- Check can bus line for short to +b (center airbag sensor assembly)
- Disconnect the e45 center airbag sensor connector.
- Measure the resistance of the dlc3.
Standard resistance
Replace center airbag sensor assembly
- Check can bus line for short to +b (no. 1 Junction connector - ecm)
- Disconnect the a36 no. 1 Junction connector.
- Measure the resistance of the wire harness side
connectors.
Standard resistance
- Check can bus line for short to +b (no. 1 Junction connector - abs
and traction actuator)
- Measure the resistance of the wire harness side
connectors.
Standard resistance
Repair or replace can main wire and connector (no. 1 Junction connector -
no.
2 Junction connector)
- Connect connector
- Reconnect the a36 no. 1 Junction connector.
- Check can bus line for short to +b (ecm)
- Disconnect the a9 ecm connector.
- Measure the resistance of the dlc3.
Standard resistance
Replace ecm
- Connect connector
- Reconnect the a36 no. 1 Junction connector.
- Check can bus line for short to +b (abs and traction actuator)
- Disconnect the a19 abs and traction actuator (skid
control ecu) connector.
- Measure the resistance of the dlc3.
Standard resistance
Replace abs and traction actuator (skid control ecu)
- Connect connector
- Reconnect the e70 no. 3 Junction connector.
- Check can bus line for short to +b (no. 2 Junction connector - yaw
rate sensor)
- Disconnect the e68 no. 2 Junction connector.
- Measure the resistance of the wire harness side
connectors.
Standard resistance
- Check can bus line for short to +b (no. 2 Junction connector - power steering ecu)
- Measure the resistance of the wire harness side
connectors.
Standard resistance
- Check can bus line for short to +b (no. 2 Junction connector - main
body ecu)
- Measure the resistance of the wire harness side
connectors.
Standard resistance
- Check can bus line for short to +b (no. 2 Junction connector - air conditioning amplifier)
- Measure the resistance of the wire harness side
connectors.
Standard resistance
- Check can bus line for short to +b (no. 2 Junction connector -
steering angle sensor)
- Measure the resistance of the wire harness side
connectors.
Standard resistance
Repair or replace can main wire and connector (no. 2 Junction connector -
no.
3 Junction connector)
- Connect connector
- Reconnect the e68 no. 2 Junction connector.
- Check can bus line for short to +b (yaw rate sensor)
- Disconnect the k6 yaw rate sensor connector.
- Measure the resistance of the dlc3.
Standard resistance
Replace yaw rate sensor
- Connect connector
- Reconnect the e68 no. 2 Junction connector.
- Check can bus line for short to +b (power steering ecu)
- Disconnect the e18 power steering ecu connector.
- Measure the resistance of the dlc3.
Standard resistance
Replace power steering ecu
- Connect connector
- Reconnect the e68 no. 2 Junction connector.
- Check can bus line for short to +b (main body ecu)
- Disconnect the e17 main body ecu connector.
- Measure the resistance of the dlc3.
Standard resistance
Replace instrument panel junction block (main body ecu)
- Connect connector
- Reconnect the e68 no. 2 Junction connector.
- Check can bus line for short to +b (air conditioning amplifier)
- Disconnect the e37*1 or e36*2 air conditioning amplifier
connector.
Hint:
- *1: For automatic air conditioning system.
- *2: For manual air conditioning system.
- Measure the resistance of the dlc3.
Standard resistance
Replace air conditioning amplifier
- Connect connector
- Reconnect the e68 no. 2 Junction connector.
- Check can bus line for short to +b (steering angle sensor)
- Disconnect the e11 steering sensor connector.
- Measure the resistance of the dlc3.
Standard resistance
Replace steering angle sensor
- Check can bus line for short to +b (no. 4 Junction connector - 4wd control ecu)
Notice:
For vehicles without 4wd, go to "check can bus line
for short to +b (no. 4 Junction connector -
combination meter ecu)".
- Measure the resistance of the wire harness side
connectors.
Standard resistance
- Check can bus line for short to +b (no. 4 Junction connector - combination meter ecu)
- measure the resistance of the wire harness side
connectors.
Standard resistance
- Connect connector
- Reconnect the e69 no. 4 Junction connector.
- Check can bus line for short to +b (4wd control ecu)
- Disconnect the e57 4wd control ecu connector.
- Measure the resistance of the dlc3.
Standard resistance
Replace 4wd control ecu
- Connect connector
- Reconnect the e69 no. 4 Junction connector.
- Check can bus line for short to +b (combination meter ecu)
- Disconnect the e19 combination meter ecu connector.
- Measure the resistance of the dlc3.
Standard resistance
Replace combination meter ecu
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 ...
(2005/11-2006/01)
Description
There may be a short circuit between the can bus line and gnd when there is
resistance between
terminals 6 (canh) and 4 (cg) or terminals 14 (canl) and 4 (cg) of the ...
Other materials:
Brake system malfunction
Description
This dtc is output when the vsc system has a problem. Check the vsc system
when this dtc is
output.
Inspection procedure
Hint:
This circuit uses can communication. Therefore, if there are any malfunctions
in the communication
circuit, one or more dtcs in the can communi ...
On-vehicle inspection
Hint:
When pressing the switch for 0.3 Seconds or less, the roof
glass moves but auto operation does not operate.
Check auto operation
Turn the ignition switch on.
When the roof glass is fully closed, press the slide
open switch for 0.3 Seconds or more. Check that
the roof glass au ...
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 ...