Precaution
PRECAUTION
NOTICE FOR INITIALIZATION
NOTICE:
When
disconnecting the cable from the negative (-) battery terminal,
initialize the following systems after the cable is reconnected.
|
System | See Procedure |
|
Lane Departure Alert System (w/ Steering Control) |
 |
|
Pre-collision System |
|
Intelligent Clearance Sonar System* |
|
Lighting System (for Gasoline Model with Cornering Light) |
|
Parking Assist Monitor System |
|
Panoramic View Monitor System |
*: When performing learning using the Techstream.
Click here
NOTICE:
- After the engine switch is turned off, the radio and display receiver
assembly records various types of memory and settings. As a result,
after turning the engine switch off, make sure to wait at least 85
seconds before disconnecting the cable from the negative (-) battery
terminal. (for Audio and Visual System)
- After the engine switch is turned off, the radio and display receiver
assembly records various types of memory and settings. As a result,
after turning the engine switch off, make sure to wait at least 85
seconds before disconnecting the cable from the negative (-) battery
terminal. (for Navigation System)
CAN COMMUNICATION SYSTEM TROUBLESHOOTING
(a)
Because the order of diagnosis is important to allow correct diagnosis,
make sure to begin troubleshooting using How to Proceed with
Troubleshooting when CAN communication system related DTCs are output.
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(b) Precaution for steering system handling
(1)
Be careful when replacing parts. Incorrect replacement could affect the
performance of the steering system and result in hazardous driving.
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(c) Precaution for SRS airbag system handling
NOTICE:
This
vehicle is equipped with a Supplemental Restraint System (SRS) which
includes parts such as airbags for the driver and front passenger.
Failure to carry out service operations in the correct sequence could
cause unexpected SRS deployment during servicing and may cause a serious
accident. Before servicing (including removal or installation of parts,
inspection or replacement), be sure to read Precaution for SRS.
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(d) Precaution for when disconnecting a wire harness from a CAN junction connector
(1)
When disconnecting a wire harness from a CAN junction connector, use
tape or tags to identify each connector and make sure to reconnect each
connector to its original location on the CAN junction connector.
HINT:
- Reconnecting a connector to a location other than its original location
on the CAN junction connector will not affect system performance.
However, reconnecting connectors to their original locations makes
future maintenance easier and avoids negative effects on wire harnesses,
such as excessive tension.
- For information on how to identify the ECUs or sensors connected to the CAN junction connector, refer to Terminals of ECU.
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(e) Bus line repair
(1) After repairing a bus line with solder, wrap the repaired area with electrical tape.
|
*a | Soldered Area to Be Wrapped with Electrical Tape |
NOTICE:
- When installing, make sure that these lines are twisted, because CAN bus
lines are likely to be influenced by electrical noise if the bus lines
are not twisted.
- Ensure that there is no gap between the CANH wire and CANL wire.
- Make sure that the distance between the first twist of the wires and the connector is less than 80 mm (3.15 in).
- When repairing the CAN bus lines, do not change the length of the lines.
(Make sure that the length of the CANH bus line and CANL bus line are
the same.)
(2) Do not use bypass wiring between connectors.
NOTICE:
- The ability of the twisted bus lines to resist interference will be lost if bypass wiring is used.
- Do not use a twisted pair of wires for bypass wiring.
(f) Connector handling
(1) When checking resistance with a tester, insert the tester probes from the backside (harness side) of the connector.
(2)
When it is not possible to insert the tester from the backside of the
connector, using service wires, measure from the front side of the
connector.
(g) Precaution for when replacing a gateway function equipped ECU (sub bus monitoring ECU)
(1)
When replacing a gateway equipped function ECU (sub bus monitoring ECU)
with one which was installed to another vehicle, perform initialization
of the sub bus monitoring ECU in order to clear stored bus information.
Click here
NOTICE:
If
the stored bus information does not match the current sub bus
configuration, DTCs may be stored and fail-safe functions may operate.
HINT:
It
is not necessary to perform initialization of a gateway monitoring ECU
(sub bus monitoring ECU) when using a sub bus monitoring ECU which was
installed to another vehicle with the same sub bus configuration.
(h)
Precautions for when a gateway function equipped ECU (sub bus monitor
ECU) detects communication DTCs for ECUs not connected to the ECU
(1)
Refer to precautions when replacing a gateway function equipped ECU
(sub bus monitoring ECU) and initialize the connection information of
the ECU.
(2) Clear the DTCs and check that no DTCs are output.
(i)
Difference between genuine navigation receivers/radio and display
receivers and optional navigation receivers/radio and display receivers
(1)
Some optional navigation receivers/radio and display receivers are
available as CAN compatible devices. Be aware that some optional
navigation receivers/radio and display receivers do not have the same
diagnostic features or characteristics of genuine navigation
receivers/radio and display receivers.
NOTICE:
- Optional navigation receivers/radio and display receivers receive data
from the CAN communication system. However, most optional navigation
receivers/radio and display receivers do not send signals to the CAN bus
main line.
- Most optional navigation receivers/radio and display receivers will not
be displayed on the "CAN Bus Check" screen of the Techstream.
- When checking for DTCs using the Techstream, DTCs for optional
navigation receivers/radio and display receivers will not be displayed
on the Techstream.
