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CAN Communication System DescriptionNKS004Z1
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitNKS004Z2
Refer to LAN-48, "CAN System Specification Chart" .
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SchematicNKS004Z3
TKWT4043E
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Wiring Diagram — TAIL/L —NKS004Z4
TKWT5760E
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TKWT5761E
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TKWT5762E
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TKWT4047E
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TKWT4048E
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Terminals and Reference Values for BCMNKS004Z5
CAUTION:
Check combination switch system terminal waveform under the loaded condition with lighting
switch, turn signal switch and wiper switch OFF not to be fluctuated by overloaded.
Turn wiper dial position to 4 except when checking waveform or voltage of wiper dial position.
Wiper dial position can be confirmed on CONSULT-III. Refer to LT- 9 1 , "
DATA MONITOR" .
Te r -
minal
No.Wire
colorSignal nameMeasuring condition
Reference value
Ignition
switchOperation or condition
2GYCombination
switch input 5ONLighting, turn,
wiper switch
(Wiper inter-
mittent dial
position 4)OFF Approx. 0 V
Any of the conditions below
Lighting switch 1ST
Lighting switch HIGH beam
(Operates only HIGH beam
switch)
Approx. 1.0 V
Lighting switch 2ND
Approx. 2.0 V
3L/WCombination
switch input 4ONLighting, turn,
wiper switch
(Wiper inter-
mittent dial
position 4)OFF Approx. 0 V
Any of the conditions below
Lighting switch 2ND
Lighting switch PASSING
(Operates only PASSING switch)
Approx. 1.0 V
11 L GIgnition switch
(ACC)ACC — Battery voltage
PKIB4959J
PKIB4953J
PKIB4959J