SERVICE PRECAUTIONS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-4
SERVICE PRECAUTIONS
M1548302100043
WARNINGS IN DIAGNOSIS SECTION
DETAILS REGARDING WARNINGS
When servicing a CAN bus line, ground yourself
by touching a metal object such as an unpainted
water pipe. If you fail to do so, a component
connected to the CAN bus line may be damaged.
−
CAUTION
A digital multimeter should be used.
When measuring resistance value or voltage in
CAN bus lines, use a digital multimeter. If not
using a digital multimeter, the equipment
connected through the CAN communication
lines, may be damaged.
CAUTION
Disconnect the negative battery terminal.
Disconnect the negative battery terminal when
measuring the resistance value in the CAN bus
line. If you fail to do so, a component connected
through the CAN communication lines may be
damaged.
CAUTION
The test wiring harness should be used.
Always use the test harness when measuring the
voltage or resistance value at the female
connector. If you fail to do so, connectors may be
damaged.
CAUTION
The strand end of the twisted wire should be
within 10 cm (4 inches) from the connector.
If you repair the wire due to a defective
connector or its terminal or harness wire, you
should cut the wire so that the strand end of the
twisted wire should be within 10 cm (4 inches)
from the connector as shown. If it exceeds 10 cm
(4 inches), twist the wiring harness just like the
original twisted wire. If the strand end exceeds
10 cm (4 inches), a communication error may be
caused.
CAUTION
Strictly observe the specified wiring harness
repair procedure.
When you repair a CAN bus line, observe the
precautions on how to repair the CAN bus line
strictly (Refer to
P.54C-5
). If a new wire is added
or a splice point is modified for the CAN_L or
CAN_H line, an error in the CAN communication
may be caused.
AC203824
CONNECTOR
TWISTED WIRE
AB
10 cm
(4.0 inches)