Electrical junction box
Information collection module fuse
Cab tilt power output
Battery I
Instrument cluster fuse
Power sunroof fuse
Battery II
DCM battery+ MTCO fuse
Vehicle monitor fuse
Mechanical main power switch
A/C fan fuse
Tractor EBS fuse
Battery+ fuse
Fan relay
Console display power supply
Left DCM fuse
Reserved fuse
Ignition switch fuse
Reserved
Upper structure work lamp power output
Right DCM fuse
Gateway fuse
Number
Mark of places
File No.
Signature
Date
TCU30# fuse
30
86
3
1
87
85
5
2
Cab driver side ground point
Electrical junction box
BatteryDesign
Check
Review
Standardization
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
30 power supply
KL75 relay
Electrical junction box
Ignition switch ACC position
Trailer module fuse
Independent heater fuse Refrigerator fuse
Engine ECU15#
Console display fuse
Rocker switch power fuse
ADCU30# fuse
A/C compressor fuse
Cigar lighter
ECAS
Independent heater
Compressor relay
Cigar lighter and USB fuse
24V power outlet fuse
24V backup power connector
Electromagnetic clutch
Seat heater fuse
Rear module fuse
CCU/ZFAMT
Air horn relay
Electric horn relay
AVM
Electromagnetic switch battery+
Air horn relay
Electric horn fuse
Column fuse
EPB15 power
Electric horn
Front module fuse
ACC power fuse
Number
Mark of places
File No.
Signature
Date
Cab ground point
Electrical junction box
Battery case ground point
Design
Check
Review
Standardization
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
KL15 relay
Electrical junction box
Primary filter heater fuse
Instrument cluster 15# fuse
ADCU15# fuse
Primary filter heater
Wiper return fuse
Primary filter heater relay
Tractor ABS (EBS) fuse
Wiper HI fuse
Gateway SAM15 power fuse
Front module fuse
Wiper HI
Tractor ABS (EBS) fuse
A/C control unit
Wiper motor
Trailer ABS (EBS) fuse
Trailer ABS (EBS) fuse
Wiper LO
Vehicle monitor MP5 15# fuse
Cab ground point
Electrical junction box
Design
Check
Review
NBCU fuse
NBCU fuse
KL15 relay
NBCU15 power fuse
Ignition switch
TCU15 power fuse
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
K line
Left turn
signal lamp
Right turn
signal lamp
Low
Overtake beam
Electrical junction box
Radar power fuse
ECAS15# fuse
Rocker switch 15# fuse
A/C control unit 15# fuse
Air dryer 15# fuse
DCM 15# fuse
NOx sensor 15# fuse
Column harness interface
Lower sleeper reading lamp
Low
beam
High
beam
High
beam
Auto
Low beam
High beam
High beam
Overtake
Number
Mark of places
File No.
Signature
Date
Auto
HI
LO
Spray
HI Spray
Electrical junction box
Cab ground point
Design
Check
Review
Standardization
Retarder 15# fuse
INT
LO
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Charging indicator lamp Coolant level
Vehicle speed input
12V power supply
Right rear brake pad wear
Sensor GND
Air filter
Right front brake pad wear
Pneumatic circuit 4
Clearance lamp
(PWM) output
Rear fog Front fog
lamp output lamp output
Rear fog lamp Front fog
indicator lamp lamp
indicator
lamp
Front
fog
lamp
Rear Headlamp
fog
lamp
Backlight
R8
R1
Control 1
FK5 0.75A
FK1 0.75A
FK2 0.75A
Fuel tank
signal
K5
K1
K2
K4
K3
Auxiliary fuel
tank signal
R5
R6
Main fuel
tank signal
Clearance Auto
lamp
Control 2
Electric directional control valve
Cab ground point
Instrument cluster
Vehicle speed sensor
KL30 power junction box
Electric directional control valve
Fuel sensor
KL15 power junction box
Lighting knob switch
Auxiliary fuel tank fuel sensor
Brake circuit 4 signal switch
Right front brake pad wear sensor
Coolant level switch
Right rear brake pad wear sensor
Air filter clogging alarm switch
Number
Mark of places
File No.
Signature
Date
Backlight power junction box
Instrument cluster, main/auxiliary fuel tank changeover switch,
electric directional control valve, coolant level switch, air filter
clogging alarm switch, lighting knob
Battery case ground point
Design
H: High level enabled
L: Low level enabled
O: Overhang enabled
Check
Review
Standardization
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
120Ω
Seat belt
Vehicle speed
output (B6)
Cab lock
Instrument cluster
Exhaust brake
linkage shutoff
Hazard warning
lamp output
Creeper gear
Trailer ABS
FCW switch
LDW switch
Configuration resistor
ICAN_H
Left front brake pad wear
Left rear brake pad wear
Cab ground point
Left rear brake pad wear sensor
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
5V power supply
Pneumatic circuit 2
Design
Check
Left front brake pad wear sensor
Pneumatic circuit 1
Instrument cluster, transmission low range signal switch,
cab lock signal switch, seat belt lock signal switch
Brake circuit 1 air pressure sensor
Brake circuit 2 air pressure sensor
Fuel sensor
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
PTO output
Washer motor
GND
PTO in-position
switch
Wiper AUTO
Wiper LO output
GND
Position lamp
NBCU
Left front clearance lamp
Washer motor
Right front clearance lamp
Right front side marker lamp
Work lamp switch
Right rear side marker lamp
Left front side marker lamp
Left rear side marker lamp
Wiper HI output
Rear fog
lamp switch
Work lamp switch
Front fog lamp switch
Wiper sprayer
switch
Wiper AUTO
Wiper return signal
Reverse
gear switch
Cab ground point
BCAN_L
File No.
Signature
Date
Position
lamp switch
Low beam switch
Left turn signal
lamp switch
High beam switch
Differential gear
in-position switch
NBCU, side marker lamp, front clearance lamp, logo lamp
Reverse gear signal switch, PTO in-position switch, PTO solenoid valve, washer motor
Battery case ground point
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
BCAN_H
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Right turn signal
lamp switch
Wiper LO switch
Wiper HI switch
PTO switch
Hazard warning
lamp switch
15 power
supply
Independent A/C
NBCU
China VI ECU power fuse 30A
Cab power fuse 125A
7-way fuse box
Tilt fuse 50A
Hazard warning lamp switch
Reserved 150A
Tilt motor
Inverter fuse 80A
Tilt button (front wall)
NBCU
Design
Check
Review
Standardization
Process
Overhead A/C 125A
Number
Mark of places
File No.
Signature
Date
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Left exterior Exhaust
lamp
brake
Constant speed
gear output
Air horn
output
Upshift
GND
Right
exterior lamp
Upshift
Downshift
OI
Electric
horn output
Horn changeover
switch
A/M switch
Horn button
F (downshift)
Interior lamp
switch
15 power supply
Retarder
GND
R
Cab ground point
SAM, horn changeover switch, interior lamp switch
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Input shaft sensor
Output shaft sensor
Range gear solenoid valve
Clutch actuator
Clutch travel sensor
Clutch actuator solenoid valve I
Transmission brake solenoid valve
X actuator
X actuator sensor
Clutch actuator solenoid valve II
CAN interface for R&D
Y actuator
Y actuator sensor
X actuator solenoid valve
Differential gear cylinder
Differential gear sensor
Y actuator solenoid valve
Range gear cylinder
Number
Mark of places
File No.
Signature
Date
Cab ground point
AMT ECU
Range gear sensor
Differential gear solenoid valve
A HW AMT ECU peripheral circuit
Design
Check
Review
Standardization
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Exhaust brake rocker switch
Exhaust 2
Ground wire
Exhaust 1
Retarder ground wire
Exhaust brake rocker switch
Upshift
Downshift Retarder
For ZF transmission
Exhaust 2
Ground wire
Exhaust 1
Retarder ground wire
Upshift
Downshift
Retarder
ZF transmission
For HW transmission
For HW transmission
Ground wire
Clearance lamp
Ground wire
Clearance lamp
15 power supply
Cab ground point
Steering column connector
A ZF AMT ECU vehicle peripheral circuit
DLC
Combination switch
Shift knob
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
For intelligent vehicle
ZF-AMT ECU
DLC
For intelligent vehicle
Cab ground point
A ZF AMT ECU vehicle peripheral circuit
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Interaxle
differential
Interaxle
differential
Interwheel differential
Interwheel differential
R
O I
OI
Exhaust brake
Backlight
PTO
Main fuel tank
PTO
Main fuel tank
XSW2 right side switch vehicle interface
Backlight
R
Exhaust brake
O I
O I
OI
R
OI
OI
O I
Hazard
warning lamp
Hazard warning
lamp signal
Battery+
Main power switch
Hazard
warning lamp
Hazard warning
lamp signal
Battery+
Main power switch
R
OI
R
Cab right side wire 21 GND
Right side switch vehicle interface
PTO switch
Auxiliary
fuel tank
Auxiliary
fuel tank
Backlight junction box
Instrument panel rocker switch (MAN Diesel)
LDW/AEB switch
Main/auxiliary fuel tank changeover switch
Interwheel differential switch
USB charging port
Interaxle differential switch
Independent heater switch
Exhaust brake switch
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK lifting
schematic diagram
Drawing mark
Mass
Total
Sheet
sheets
Scale
China National Heavy Duty Truck Group Co., Ltd.
Switch interface 2
Low adhesion
Liquid delivery
5 1
2 8(+)
6
I O II
1 6
5
2 8(+)
I O II
OI
3
4
7(-)
3
4
Switch electrical interface 1
Liquid delivery switch
Switch electrical interface 2
Left sun shade switch
Backlight junction box
Right sun shade switch
Backlight junction box
Left sun shade motor
7(-)
Cab ground point
Instrument panel rocker switch
Design
Check
15 power junction box
Right sun shade motor
Backlight junction box
A/M switch (HW transmission)
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Completed
Backlight
Primary filter
ECU GND
Remote throttle enable
ECU power supply
DPF inhibit
15 power supply
DPF signal
Horn changeover switch
ECU GND
DPF inhibit
DPF signal
Horn changeover switch
ECU GND
DPF inhibit
DPF signal
XSW1 left side switch vehicle interface
GND
Primary filter
OI
Backlight
ECU GND
Remote throttle enable
ECU power supply
DPF inhibit
DPF signal
15 power supply
O I
R
O I
Left side switch vehicle interface
Backlight junction box
Primary filter heater switch
Exhaust brake linkage shutoff
OI
R
Exhaust brake linkage shutoff
O I
O I
OI
R
Remote throttle enable switch
Horn changeover switch
DPF active regeneration/inhibit switch
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Total
Sheet
sheets
Scale
China National Heavy Duty Truck Group Co., Ltd.
ADR ECU
Cab internal emergency power off switch
Battery+ fuse
ADR power switch
Battery I
Cab external emergency power off switch
ADR ECU peripheral circuit
BatteryDesign
Battery II
Check
ADR indicator lamp
Review
Standardization
Dual-coil relay
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Cab interior
1. For ADR ECU, X1 connector model: P200; X2 connector model: AM50
2. Internal/external emergency power off switch is the same as WG9724580001/WG9724580002
3. SS1 switch can be an ordinary power switch instead of an ADR power switch, for example, WG9719582028
Start signal
Open
Control pin
Battery
Alternator control relay
Alternator
Alternator fuse
KISSLING-ADR
Starter
Battery-
Ordinary power switch
Cab left ground point
Internal emergency power switch
Cab right ground point
Design
Check
Review
External emergency power switch
ADR ECU
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Completed
GND
Rear view
camera input
Rear view
camera GND
Horn
Power supply
Horn
Right turn warning
TPMS
24V DC
Inverter
Driver monitor system
Power supply GND Activation signal
220V power outlet
Cab ground point
China VI monitor terminal
TPMS
TPMS
Steering wheel
Clock spring
AVM, co-driver seat, China VI monitor terminal, rain-light sensor
Battery case ground point
Design
Check
AVM
Rain-light sensor
Review
Standardization
Process
Handle controller
Number
Mark of places
File No.
Signature
Date
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total 34 sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
K line
Constant speed gear
Interwheel
differential signal
Interwheel
differential signal
Left turn signal lamp
Brake lamp
Left position lamp
Reversing lamp
Interaxle
differential signal
Fog lamp
Rear module
Right turn signal lamp Right position lamp
Retarder switch power supply
Water temperature-
Turn signal lamp Brake lamp
Position lamp
Reversing lamp
Fog lamp
Fog lamp
Turn signal lamp Position lamp
Brake lamp
Water temperature
signal
Oil temperature-
Constant speed gear
Oil temperature
signal
Proportional valve H
Ground wire
Proportional valve L
Rear module
Oil temperature sensor
Left rear tail lamp
Proportional valve
Right rear tail lamp
Pressure sensor
Rear 1st axle interwheel differential
signal switch
Rear 2nd axle interwheel differential
signal switch
Interaxle differential signal switch
Retarder interface
Voith retarder ECU
Water temperature sensor
pressure sensor signal
Pressure sensor-
Reversing lamp
Rear module, Voith retarder
Battery case ground point
Design
Check
Review
Standardization
Process
Countersignature
File No.
Pressure sensor +5V
K line
Ground wire
Ground wire
Number
Mark of places
15 power supply
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Compressor relay control+
Defroster mode motor
Feedback signal
Defroster mode motor-
AC request signal
15 power supply
Fan feedback signal
Pressure switch Medium voltage switch
Circulation motor+
Circulation motor- Comfort CANL
Comfort CANH
A/C control module
Circulation damper motor
Speed governor control module
Defroster 2 motor
Inside temperature sensor
Air outlet mode servo motor
Fan relay control+
Water valve motor+
Water valve motor-
5V power supply
Feedback
Signal GND
Idle D+
Feedback
signal
Air outlet mode motorIGN detection
Air outlet mode motor+
Defroster mode motor+
Defroster mode motor-
Feedback signal
Inside temperature
Evaporator temperature
A/C control module peripheral circuit
Cab ground point
Water valve motor
Design
Evaporator temperature sensor
Defroster 1 motor
Check
Review
Standardization
Blower
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
LED1 (white)
R8
R6
R4
R11
R2
LED2 (green)
R10
Front module
3rd gear
2nd gear
R9
1st gear
0 gear
R7
R5
R3
Tractor left
Tractor left low beam high beam
R1
Leveling
Ground wire
Radar CAN_H
Left low beam
Left high beam
Tractor front
position lamp
Front position
lamp
Tractor daytime running lamp
Daytime running lamp
Tractor left high
beam assist
Tractor left front
fog lamp
Left high beam assist
Left front fog
lamp
ractor left front
turn signal lamp
Tractor right
low beam
Left turn signal lamp
Tractor right
high beam assist
Tractor right high beam
Right low beam Right high beam
Right high beam assist
Tractor right
front fog lamp
Tractor right front
turn signal lamp
30 power 30 power
supply
30 power supply 30 power supply supply
GND
Right front fog lamp Right turn signal lamp
Radar CAN_L
Pin definition according to warning/control
Left headlamp
Right headlamp
Headlamp leveling switch
Front module
Cab driver side ground point
Design
Battery case ground point
Check
Review
Bumper interface
Radar
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Trailer module
Trailer ABS_15 power supply
Trailer ABS lamp
Trailer ABS signal GND
Trailer ABS_30 power supply
Trailer CAN_L
Trailer ABS GND
Trailer CAN_H
30 power supply
30 power supply 30 power supply
30 power supply
BCAN-H
BCAN-L
GND
Trailer right rear
turn signal lamp
Work lamp
GND
Trailer left rear turn
Trailer reversing lamp
signal lamp
Right turn
Left turn
Reversing
lamp
signal lamp signal lamp
Trailer rear fog lamp
Trailer brake lamp
Trailer position lamp
Fog lamp Brake lamp Position lamp
Air filter
ABS indicator lamp
Gantry
electrical
interface
Work lamp
ABS/EBS 7-hole trailer socket
7 pins trailer socket harness connector
Gantry electrical interface
15 pins trailer socket connector
Gas filter
Gantry electrical interface
Cab driver side ground point
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Door lock
Rearview mirror Com2
unlocking/locking switch
Rearview mirror com1
GND
Rearview mirror Com3
Rearview
mirror com1
Rearview mirror
Com2
Rearview mirror
Com3
Rearview mirror
defroster output
Door lock
unlocking/locking
switch
Rearview rightward Rearview upward Rearview Com4 Rearview downward Rearview leftward Left door window Right door window
lifting/lowering
adjustment
lifting/lowering
adjustment
adjustment
adjustment
Backlight control
Backlight
Rearview rightward
adjustment
Wide-angle mirror
upward/downward adjustment
Rearview upward
adjustment
Left door window
Rearview Com4 Rearview downward
lifting/lowering
adjustment
Rearview leftward
adjustment
Wide-angle mirror
leftward/rightward adjustment
Right door window lifting/lowering
Main mirror
upward/downward adjustment
Main mirror leftward/rightward adjustment
Battery+
KL15
15 power supply
Door window lifting+
SCAN-H
CAN_H
Door window lowering-
SCAN-L
CAN_L
Locking feedback
Locking feedback output
GND
Auxiliary brake Main brake
EU power
supply
Clutch
Locking feedback output
Door lock locking+ Door lock unlocking-
Latch bolt locking
feedback signal
Door lock locking feedback signal
Door lock motor
Driver DCM
Driver door window regulator motor
Driver DCM control panel
Driver door lock motor
Driver rearview mirror
Driver wide-angle mirror upward/downward
adjustment motor
Driver rearview mirror defroster
Driver wide-angle mirror leftward/rightward
adjustment motor
Driver rearview mirror upward/downward
adjustment motor
Driver rearview mirror leftward/rightward
adjustment motor
Number
Mark of places
File No.
Signature
Date
Ambient lamp
Left door lamp
Cab ground point
Driver DCM peripheral circuit
Design
Check
Review
Standardization
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Backlight
Battery+
Lowering
GND
Door window lifting+
Battery+ 15 power supply
Co-driver door
window regulator
Rearview mirror
defroster output
Wide-angle mirror
upward/downward
adjustment
Co-driver DCM
Wide-angle mirror
leftward/rightward
adjustment
Main mirror
upward/downward
adjustment
Co-driver door lock motor
Co-driver rearview mirror defroster
Co-driver door window regulator motor
Co-driver rearview mirror
Main mirror leftward/rightward adjustment
Right DCM harness interface
Right door lamp
Design
Check
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Lifting
Right DCM
Cab ground point
Review
Ambient lamp
Lowering
Driver door window lowering Driver door window lifting Co-driver door window lifting
Co-driver door window lowering
Door lock Door lock Latch bolt locking Door lock locking
unlocking- feedback signal
locking+
feedback signal
Co-driver wide-angle mirror upward/downward
adjustment motor
Co-driver wide-angle mirror leftward/rightward
adjustment motor
Co-driver rearview mirror upward/downward
adjustment motor
Co-driver rearview mirror leftward/rightward
adjustment motor
Co-driver DCM control panel
Door window
lowering-
Lifting
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Clock spring Main DCM Auxiliary DCM
A/C
A/C
Auxiliary DCM Main DCM Clock spring
ZF AMT diagnosis
ZF AMT diagnosis
Rain-light
sensor
Rear module
Right turn warning
Rear module Rain-light sensor
Gateway ECU
File No.
Signature
Date
Driver monitor system Instrument cluster
Instrument
cluster
Right turn
warning
Driver monitor
system
Information CAN
120Ω resistor
Comfort CAN
120Ω resistor
Body CAN
120Ω resistor
Intelligent CAN
Power CAN
Intelligent communication CAN
Diagnosis CAN
Number
Mark of places
Right turn warning
Gateway
Cab ground point
Design
Check
Review
Standardization
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
R
OI
OI
R
All-wheel drive
Backlight
ABS vehicle interface
Trailer KL30
GND
GND
K line
Trailer fault indicator
lamp GND
Trailer KL15
Trailer GND
Trailer fault indicator lamp
Auxiliary
GND
Left front wheel solenoid valve
Right front wheel solenoid valve
Left rear wheel solenoid valve
Right rear wheel solenoid valve
ABS ECU
ABS/EBS vehicle electrical interface
Left front wheel sensor
Left front wheel solenoid valve
Right front wheel sensor
Right front wheel solenoid valve
Left rear wheel sensor
Left rear wheel solenoid valve
Right rear wheel sensor
Right rear wheel solenoid valve
EBL sensor
ASR solenoid valve
Backlight junction box
Chassis ground point
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
OI
R
OI
R
Trailer
CAN-L
Auxiliary
GND
Left front wheel solenoid valve
Right front wheel solenoid valve
Left rear wheel solenoid valve
Right rear wheel solenoid valve
Steering angle sensor
ABS+ESC ECU
Left front wheel sensor
Left front wheel solenoid valve
Backlight junction box
Right front wheel sensor
Right front wheel solenoid valve
ESC
Left rear wheel sensor
Left rear wheel solenoid valve
Front axle ASR solenoid valve
Right rear wheel sensor
Right rear wheel solenoid valve
EBL sensor
Rear axle ASR solenoid valve
Chassis ground point
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Trailer
CAN_H
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Left rear sensor
O I
HSA switch
AV-left front
EV-left front
GND-left front
R
Right rear sensor
Trailer valve
GND-right front
Trailer valve-LOW
EBS3 ECU
HSA switch
Trailer valve
Left front wheel sensor
ASR/ESC OFF switch
Steering angle sensor
Right front wheel sensor
Left front wheel solenoid valve
Ground wire junction box
Left rear wheel sensor
Right front wheel solenoid valve
ESC ECU
Right rear wheel sensor
Front axle module
Foot valve
Rear axle module
Trailer valve-AV
Trailer valve - EV
Trailer valve - BUV
File No.
Signature
Date
Left front sensor
Trailer valve
Trailer valve
Right front sensor
Right front sensor
Trailer CAN-H
Trailer CAN-L
EBS3.1/3.3 peripheral wiring diagram
Cab ground point
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
Left front sensor
Ground wire
15 power supply
EV-right front
Right rear sensor
R
O I
ASR switch
AV-right front
Left rear sensor
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Drive axle left height sensor
Lift axle pressure sensor
Drive axle right height sensor
K line
30 power supply
15 power supply
Ground wire
K line
30 power supply
15 power supply
Ground wire
Drive axle left pressure sensor
Lift axle lift switch
Drive axle right pressure sensor
Optimum traction Drive help
Lift axle airbag pressure sensor
3-way height selector switch
ECAS ECU
Drive axle right pressure sensor
ECAS remote control
Lift axle airbag pressure sensor
Lift axle pressure sensor
Lift axle main solenoid valve
Drive axle left height sensor
Center solenoid valve
Remote control+
Remote control- Remote control CLOCK
Remote control DATA
Front axle height sensor
Solenoid valve
power supply
Lift axle left airbag
solenoid valve
Pressure sensor power supply
Cab ground point
ECAS electrical interface
Drive axle left pressure sensor
Check
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Lift axle solenoid valve
Drive axle left airbag solenoid valve
Drive axle right airbag
solenoid valve
Center solenoid valve
Sensor GND
A ECAS 2.0 control system
Design
Review
Drive axle right height sensor
Lift axle right airbag solenoid valve
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Power supply
Signal
Drive axle left height sensor
15 power supply
GND
Power supply
30 power supply
Signal
Drive axle right height sensor
GND
Solenoid valve power supply
GND
Drive axle left airbag solenoid valve Drive axle right airbag solenoid valve
Center solenoid valve
Solenoid valve power supply
Drive axle solenoid valve
Power supply
Front axle height sensor
Signal
GND
Front axle center solenoid valve
Front axle airbag solenoid valve
Front axle solenoid valve
3-way height selector switch
Low position High position
Drive help
Height 2
Height 1
Normal height
Height 2
Height 1
30 power supply
15 power supply
ELC ECU
Front axle airbag solenoid valve
ECAS remote control
Drive axle solenoid valve
3-way height selector switch
Vehicle electrical junction box
Front axle height sensor
Drive axle left height pressure sensor
Cab co-driver side ground point
Cab negative ground point
Cab 15 power junction box
Design
Check
Review
Standardization
Drive axle right height pressure sensor
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Total
Sheet
sheets
Scale
China National Heavy Duty Truck Group Co., Ltd.
Height 2
Height 1
Normal height
Height 2
Drive help Optimum traction
Height 1
Axle load Low position High position
Power supply
3-way height selector switch
30 power supply 30 power supply
GND
GND lifting
GND
Solenoid valve common terminal
Lift axle lowering
LIN line
Power supply
Signal
ECAS4.0 ECU
Drive axle solenoid valve
ECAS remote control
Vehicle electrical junction box
3-way height selector switch
Lift axle switch
Cab negative ground point
ECAS4.0 additional ECU
Drive help switch
Cab 15 power junction box
Drive axle left height pressure sensor
Drive axle right height pressure sensor
GND
15 power supply
Signature
Drive axle solenoid valve
30 power supply
GND
GND
Axle load switch
Cab co-driver side ground point
Design
Check
Review
Standardization
Process
Countersignature
File No.
Drive axle left airbag solenoid valve Center solenoid valve
30 power supply
15 power supply
Number
Mark of places
Drive axle right airbag
solenoid valve
Drive axle right height sensor
Lift axle
15 power supply
Signal
Drive axle left height sensor
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Total
Sheet
sheets
Scale
China National Heavy Duty Truck Group Co., Ltd.
GND
Clearance
lamp
Rear view
Rear view
camera input camera GND
Cab ground point
12.3-inch console display
Right speaker
Vehicle monitor assembly
Microphone
Left door speaker
Screen
Right door speaker
Left speaker
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
MP5, vehicle monitor, MIC, speaker
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
O
Roof electrical
interface 2
I
KL30
Vehicle speed input
Right turn signal
lamp input (high)
Left turn signal
lamp input (high)
Roof electrical interface 1
KL15
30 power supply
High beam
input (high)
GND
Backlight
15 power supply Ground wire
Low beam
Brake lamp
input (high)
input (high)
ACAN_H
Ground wire ACAN-H
ACAN_L
DCAN-H
DCAN-L
ACAN-L
DCAN-H
DCAN-L
Brake
lamp
Low
beam
High
beam
Left turn Right turn Vehicle
signal lamp signal lamp speed
Left exterior
lamp
Right
KL30
GND Sunroof open Sunroof closed
Backlight
I O Ⅱ
Cab driver side ground point
Intelligent communication
SOS switch
Roof interface 2
Roof interface 1
Power sunroof
Power sunroof switch (storage box)
Left exterior lamp
Right exterior lamp
Storage box switch (middle)
Middle storage box lamp
Right storage box lamp
Left storage box lamp
Sleeper lamp
Battery case ground point
Check
Review
Standardization
Countersignature
File No.
Signature
Date
Interior lamp switch, SOS switch, work lamp switch
Design
Process
Number
Mark of places
Intelligent communication, power sunroof switch
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
OI
Roof electrical interface 1
Independent heater
Work lamp
30
Optimum
traction Drive help
Lift axle
3-way height selector
switch signal
Remote control
Clearance lamp
Tweeter
Roof electrical interface 1
ECAS electrical
interface
OI
I O Ⅱ
OI
I
O Ⅱ
I O Ⅱ
Independent heater switch
Work lamp switch
Roof interface 3
3-way height selector switch
Lift axle switch
Drive help switch
Interior lamp switch
Right rear clearance lamp
Left rear clearance lamp
Right front clearance lamp
Left front clearance lamp
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Starter switch
Exhaust brake switch
Neutral gear signal
MIL
Multistate ground wire
Parking brake
signal switch
A/C switch
Auxiliary brake switch
Main brake switch
Regeneration request Clutch switch
Power output
PCAN_H
PCAN_L
Vehicle speed signal
DCAN_H
DCAN_L
Regeneration inhibit
Ambient
temperature sensor
Ambient temperature
sensor ground wire
ECU electrical interface 2
KL15
Start
Exhaust brake
Neutral gear
MIL
ECU GND
A/C
Auxiliary brake
Main brake
DPF
Clutch
ECU output Multiple throttle Air compressor
CAN_H
CAN_L
Vehicle speed signal CAN_H
CAN_L
DPF inhibit
Ambient
temperature signal
NOx sensor
Ambient
temperature GND power supply
ECU electrical
interface 1
Engine ECU
Brake lamp switch
Parking brake switch
Clutch switch
Ambient temperature sensor
ECU electrical interface 1
ECU electrical interface 2
Electromagnetic clutch
Cab driver side ground point
Battery case ground point
Engine ECU peripheral circuit
Design
Check
Review
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Intake pressure/temperature sensor
Oil pressure sensor
Fuel control valve
Throttle 1 power
supply +5V
Throttle 1 signal
Throttle 1 GND
Throttle 2 power
supply +5V
Throttle 2 signal
Accelerator
pedal 2 GND
Remote throttle enable switch
V-APP1
APP1
G-APP1
Water separator signal switch
Engine ECU
Remote throttle sensor
Engine ECU peripheral circuit
ECU power output junction box
Design
Accelerator pedal
Check
Review
Remote throttle
Number
Mark of places
File No.
Signature
Date
Accelerator pedal sensor I
Clutch switch
Accelerator pedal sensor II
Water separator switch
Standardization
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Common rail pressure sensor Camshaft sensor
Crankshaft sensor
Water temperature sensor
Intake glow plug relay
Power supply Start output
Engine ECU
Preheater
Exhaust brake solenoid valve
Engine ECU peripheral circuit
Cab ground point
Exhaust brake solenoid valve
Starter
Alternator
Ambient temperature sensor
Design
Check
Review
Standardization
Process
Glow plug relay
Number
Mark of places
File No.
Signature
Date
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
DEF level/temperature sensor
Catalyst upstream
temperature sensor
DEF nozzle valve DEF tank heater valve
Electromagnetic fan
Electromagnetic fan sensor
NOx sensor
For China III
DEF nozzle heater
DEF pipe
pressure heater
SCR main relay
DEF suction
pipe heater
DEF pump heater
DEF supply unit
Engine ECU
Preheater
#6 injector
Spare fuse
DEF pump heater relay
Preheater fuse
#1 injector
SCR main relay fuse
ECU-30 power fuse
Spare relay
Glow plug relay
Exhaust brake
solenoid valve
Ambient
temperature sensor
Chassis electrical
junction box
#2 injector
DEF pipe pressure heater fuse
SCR main relay
#3 injector
DEF nozzle heater fuse
DEF pipe pressure heater relay
#4 injector
DEF suction pipe heater fuse
DEF nozzle heater relay
#5 injector
DEF pump heater fuse
DEF suction pipe heater relay
A engine ECU peripheral circuit
Design
Number
Mark of places
File No.
Signature
Date
Primary fuse
Check
Review
Standardization
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Cooling water valve
Battery+
DEF pump heater DEF pump+
Battery+
DEF pump heater DEF pump+
DEF pump- VCC1
SGND
DEF pressure DEF pipe heater
DEF pump- DEF pressure+ DEF pressure- DEF pressure DEF pipe heater
SCR ECU
SCR fuse
DEF pump
DEF pipe heater
NOx sensor
Cooling water valve
DEF temperature/level sensor
DEF nozzle
Battery-
Upstream
Upstream
temperature sensor temperature sensorDownstream
Communication CAN-H Communication CAN-L Diagnosis CAN-H Diagnosis CAN-L
temperature sensor
DEF nozzle
DEF temperature
DEF pipe heater
Battery negative terminal
Domestic SCR ECU peripheral circuit
Design
Check
SCR assembly upstream
temperature sensor
SCR assembly downstream
temperature sensor
New
Number
Mark of places
File No.
Signature
Date
DEF level
Review
Standardization
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Warning version camera
Control version camera
GND
GND
O I
OI
Radar CAN_H
Radar CAN_L
O I
120Ω
AEB enable switch LDW enable switch
Smart brake switch
GND
120Ω
120Ω
GND
Backlight
GND
Intelligent vehicle ECU
Camera connector
Radar
Electronic map
TCAN 120Ω resistor
VCAN 120Ω resistor
ZCAN 120Ω resistor
Number
Mark of places
File No.
Signature
Date
LDW/AEB switch
Smart brake switch
Camera
ADAS electrical interface
Radar CAN_H
Radar CAN_L
Cab ground point
Battery case ground point
ADAS ECU
Design
Check
Review
Standardization
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Transmission electrical interface
Neutral gear
GND
Reverse gear
Creeper gear Differential gear
PTO in-position
switch
Vehicle speed
power supply
Vehicle
Vehicle
speed
signal+
speed signal-
Power supply (12V)
Interwheel differential lock solenoid valve
Vehicle speed sensor
Interaxle differential lock solenoid valve
Neutral gear switch
Exhaust brake solenoid valve
Reverse gear switch
PTO solenoid valve
PTO in-position switch
Differential gear in-position switch
File No.
Signature
Date
Interwheel
differential
GND Interaxle differential
PTO
Exhaust brake Exhaust GND
Solenoid valve electrical interface
Signal GND
Transmission electrical interface
Range gear switch
Number
Mark of places
Vehicle speed GND
Solenoid valve electrical interface
Cab ground point
Transmission and solenoid valve interface
Design
Check
Review
Standardization
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.
Completed, except 8 pin
Electromagnetic
pump
Bottom electrical interface 1
Left lifting
Right lifting
Left lowering
I O Ⅱ
R I O Ⅱ
Right lowering
Sunroof lowering
Sunroof lifting
Backlight
Rocker switch power supply
O Ⅱ
R I
OI
Seat belt
Interior lamp switch
Left turn signal lamp
Bottom electrical interface 2
Right turn signal lamp
Left window regulator switch (sleeper)
Cab lock switch
Right window regulator switch (sleeper)
Cab lock switch
Design
Power sunroof switch (sleeper)
Seat belt warning switch
Check
Right snakeskin lamp
Cab ground point
Review
Driver seat heater
Charging port (sleeper)
Refrigerator
Standardization
Process
Countersignature
Number
Mark of places
File No.
Signature
Date
Refrigerator
GND GND
R
Bottom electrical interface 1
Interior lamp switch (sleeper)
Seat power supply
Approval
Bottom harness electrical interface
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Total
Sheet
sheets
Scale
China National Heavy Duty Truck Group Co., Ltd.
Left chassis harness connector
GND
Wiper return
power supply
Wiper return
Wiper HI
Wiper LO
Pneumatic circuit 3- Washer pump motor
Headlamp leveling
switch output
Right turn
signal lamp
Front module Radar power
power supply A supply
Radar CAN-H
Front module
Radar CAN-L power supply B
BCAN-H
BCAN-H
Parking brake
Parking brake signal switch
Front wall peripheral circuit
Left front turn signal lamp
Design
Wiper motor
Right turn signal lamp
Check
Review
Standardization
Parking brake signal switch
Wiper motor
Number
Mark of places
File No.
Signature
Date
Process
Countersignature
Approval
SITRAK Upgrade
schematic diagram
Drawing mark
Mass
Scale
Small
Total
sheets
Sheet
China National Heavy Duty Truck Group Co., Ltd.