JAC S2. Elctrical Wiring diagrams — part 11

Power Supply on Vehicle

Combination meter

152

EPS fault indicating light

When turning ignition switch to ON, the indicating light will be on, and there is no steering wheel assisted power in steering

wheel, steering is heavy, and indicating light will be off after starting engine. If indicating light is on when driving, please stop

vehicle and check immediately.

Sound Warning

Combination meter drives buzzer by interior amplifying circuit and sound wave generator of micro-processor to produce

necessary sound warning. Reversing radar warning, driver’s safety belt warning, front passenger’s safety belt warning, parking

brake warning, headlight not close warning are sound warning, warning priority is the sequence above-mentioned, sound

loundness: 55±5db.

1. Reversing radar warning

1). Signal input

Voltage signal, come from reversing radar sensor.

2). Signal management

Obstacle distance （mm）

Sound frequency（Hz）

Zone

Note

＞ 1500

-

Safety zone

Reversing normally

900~1500

2

Safety zone

Reversing normally

600~900

4

Warning zone

Reversing decelerate

350~600

8

Danger zone

Stop reversing

＜ 350

Ding for a long time

Danger zone

Stop reversing

3). Signal output

Sound signal continuously send out until input signal disappear, sound frequency: 2000±10Hz.

2. Safety belt not fastening warning

1). Signal input

Signal source: Drive safety belt indicating light, front passenger’s safety belt indicating light, front passenger’s seat sensor,

vehicle speed signal.

2). Signal management

Refer to warning control logic in below figure, front passenger’s safety belt warning add the judgment of whether there is

person in front passenger’s seat.

Power Supply on Vehicle

Combination meter

153

3.

Signal output

Send out sound

signal once warning denoted, sound frequency: 2000±10Hz.

3. Parking brake warning

1. Signal input

Depend on the signal state below: parking brake, vehicle speed.

2. Signal management

Parking brake signal and vehicle speed ≥ 5km/h.

3. Signal output

Send out sound signal once warning denoted, sound frequency: 2000±10Hz, and ding for a long time.

Safety belt warning
happens once, engine
and safety belt state
not change

Vehicle speed
≥20km/h

Safety

belt

not fastening

0.5s ding,
0.5s stop

Vehicle speed
＜10km/h

Warning
exceed time
30s

Vehicle speed
＜10km/h

Safety

belt

not

fastening

0.5s ding
, 0.5s stop

Sound warning switch

Warning
exceed time
60s

Timer reset

Power Supply on Vehicle

Combination meter

154

Component side

connector shape

and pin definition

(shape)

Connector definition

(component side)

17

1

32

16

No. Signal

Driving mode No. Signal

Driving
mode

Remark

1

Vehicle speed signal
output

17 Communication

2

Front passenger’s
seat sensor

Resistance 18 Battery

3

Driver’s safety belt
switch

Low voltage 19 Ignition （IGN）

4

Front passenger’s
safety belt switch

Low voltage 20 -

5

PCAN_H

21 -

6

PCAN_L

22 Reversing radar

signal

PWM

7

Engine anti-theft

Low voltage 23 Meter -

8

BCANH

24 Fuel sensor -

9

BCANL

25 Fuel signal

Low voltage

10 -

26 Inner illumination(-) PWM

11 -

27 Inner illumination(+) High voltage

12 Brake liquid level low Low voltage 28 -

13 -

29 Charging indicating Low voltage

14

Main air bag

High voltage
or hanged

30 Oil pressure

Low voltage

15 -

31 -

16 -

32 -

Combination meter connector and pin definition

Driver’s information display

LCD display

Clock

Fuel gauge

Gear

position

display

Total

mileage/

Subtotal

Coolant
temperature gauge

Door open (five
doors)

Gear shifting prompt
(MT)

Average

fuel

consumption

Power Supply on Vehicle

Combination meter

155

（1）Door open: Combination meter receives door open signal (including left front door, right front door, left rear door,

right rear door and trunk) from door contact switch, and correspondingly displayed on LCD.

（2）Gear position information: Display gear position of the vehicle and more economic and reasonable gear position

prompt when vehicle driving (The function only in MT vehicle type).

（3）LCD first line display actual time clock.

（4）LCD second line display average fuel consumption. Average consumption: when ignition switch is in ignition on (engine

not start), LCD screen display fuel consumption record of last time; after engine starting, when ECU has not fuel consumption

signal, LCD screen display average consumption record of last time; if there is fuel consumption signal, display average fuel

consumption value; LCD screen freshening time is 5s.

（5）LCD third line display subtotal mileage or total mileage. Subtotal mileage display range is: 0km?~999.9km, precision

is 0.1km; total mileage display range is: 0?~999999km, precision is 1km.

（6）Key operation: user interface function switch and reset:

LCD screen default interface first line is clock display, second line display average consumption, third line display total

mileage.

When pressing left regulating rod for a short time (t ≤ 2s) in default interface, second line display average fuel consumption

(average fuel consumption twinkles at this time), and pressing right regulating rod for a long time (t ＞ 2s) to reset, not twinkle after

resetting, and automatically exit if there is no operation in 5s;

When pressing left regulating rod again, third line display subtotal mileage (subtotal mileage twinkles at this time), and

pressing right regulating rod for a long time to reset, not twinkle after resetting, and automatically exit if there is no operation in

5s;

When pressing left regulating rod again, third line display total mileage (total mileage twinkles at this time), and automatically

exit if there is no operation in 5s;

Clock regulating:

In default interface, press left regulating rod for a long time (t ＞ 2s) to get into clock regulating, “horn” twinkles at this time.

In “hour” regulating phase: press right regulating rod for a short time to increase “hour” a step, and and automatically exit

regulating mode if there is no operation in 5s;

In “hour” regulating phase, press left regulating rod for a short time (t ≤ 2s), getting into “minute” twinkling regulating phase

at this time: press right regulating rod for a short time to increase “minute” a step, and press right regulating rod for a long time to

increase “minute” in the speed of 5 steps/s; and automatically exit regulating mode if there is no operation in 5s in “minute” mode.

All twinkle frequency is 1Hz.

（III）Torque Parameter

No.

Item

Torque （N·m）

1

Combination meter assembly fixed bolt

3~5

Power Supply on Vehicle

Combination meter

156

II、Troubleshooting

（I）Troubleshooting List

1. Detect after-sale installed device that may infect system operation.

2. Detect easily connected or found system component, to detect whether it has apparent damage or may cause fault.

3. Detect whether all sensors of combination meter displaying information are normal.

No.

Fault phenomenon

Fault reason analysis

Solution method

Remark

1

Combination
meter

function

lose efficacy

Circuit not connected

Check power supply and grounding circuit

Refer to

combination

meter function

lose efficacy

Meter circuit damaged

Replace meter

2

I n d i c a t i n g
l i g h t / i l l u mi n a t i
o n l i g h t n o t o n

Circuit not connected

Check whether related circuit and connector is connected

Control signal fault

Check related switch signal

Meter circuit damaged

Replace meter

3

Indicating meter
error or not work,
mileage LCD not
work

System fault

Check whether related sensor output is normal,
whether circuit and connector is connected

Meter circuit damaged

Replace meter

4

Mileage LDC miss
stroke

Meter circuit damaged

Replace meter

（II）Troubleshooting Flow Chart

Combination meter function lose efficacy

Fault

phenomenon:

Combination

meter

function lose efficacy

Check combination
meter fuse

Check power supply voltage of
combination

meter

wiring

harness connector M07-19
Standard voltage value: 11-
14V

Check resistance of combination
meter wiring harness connector M07-
23/M07-24

and

vehicle

body

grounding
Standard resistance value: less than 1
Ω

Check circuit fault of
combination

meter

wiring

harness

connector M07-19 and
fuse

Check circuit fault of combination
meter wiring harness connector M07-
23/M07-24 and vehicle body grounding

Check open circuit fault
of fuse circuit and replace
fuse

Whether fuse is
fused

Whether

accord

with standard value

Whether

accord

with standard value

Replace combination
meter

Fault removed

Yes

Yes

Yes

No

No

No

Power Supply on Vehicle

Combination meter

157

III、Combination Meter Assembly

（I）Removal

1. Open engine cabin cover

2. Disconnect battery negative electrode Refer to “Disconnection and connection of battery electrode”
3. Remove central right side trim panel assembly Refer to “Central right side trim panel assembly”
4. Remove left end cover of dashboard Refer to “End cover of dashboard”
5. Remove driver’s side lower guard panel assembly Refer to “Driver’s side lower guard panel assembly”

6. Remove central left trim panel assembly Refer to “Central left trim panel assembly”

7. Remove combination meter assembly

1). Remove 4 fixed bolts of combination meter;

2). Pull out combination meter assembly, and disconnect wiring harness connector of combination meter;

3). Take down combination meter;

（II）Installation

1. Install combination meter assembly

1). Connect wiring harness connector of combination meter, and place combination meter to installation position;

Power Supply on Vehicle

Combination meter

158

2). Tighten 4 fixed bolts of combination meter;

Tighten torque

3~5N·m

2. Install central left side trim panel assembly
3. Install driver’s side lower guard panel assembly
4. Install left end cover of dashboard
5. Install central right side trim panel assembly
6. Connect battery negative electrode
7. Close engine cabin cover

Reversing Radar Device

Reversing Radar Device

159

Reversing Radar Device

I、Summary

（I）Structure Overview

Reversing radar device consists of sensors, controller and buzzer (integrated in meter). Reversing radar device is based on the

principle of ultrasonic distance measurement and computer data fuzzy processing technology to determine whether there are

obstacles in the vehicle reversing direction and prompt the distance of the nearest obstacle. When the steering gear hanging in

reversing, reversing switch on, reversing light on, controller receive reversing signal, control ultrasonic sensor send out ultrasonic

signal, based on the principle of self-sending self-receiving and multiple sending single receiving, send echo signal to controller

accurately and completely. After controller analyzing and processing, judge whether there are obstacles within detection distance

and the distance of nearest obstacle, and establish communication with buzzer. According to the different range of distance, send

different frequency tweet to prompt obstacle distance, aiming to security warming.

Component Position

1. Reversing radar controller assembly 2. Sensor assembly

Reversing Radar Device

Reversing Radar Device

160

（II）Operation principle

System Schematic Diagram

II、Troubleshooting

（I）Troubleshooting List

NO.

Fault

phenomenon

Fault reason analysis

Solution

Remark

1

When reversing,
system not work

Reversing switch not connected

Replace reversing switch

Refer

to

system

not

work

Wiring harness and main power supply bad
connected

Check whether wiring harness connect
to power supply rightly

Connector wrong connect

Connect all connectors rightly again

2

Sensor not work

Connector position not right, causing sensor
not work

Connect all sensor connectors rightly
again

Refer to sensor
not work

3

Buzzer
continuously
warning, but no
obstacle

behind

vehicle

Detect body or ground

Install according to instructions, if
necessary,

request

professional

technician to guide and check

Sensor wrong installation or drop

Sensor damaged

Please replace in time

Sensor connected wire damaged

Check whether wiring harness is
damaged

4

Can’t display the
distance

of

obstacle rightly

Battery voltage abnormal

Check whether battery voltage is
normal

Connector position not right

Close system, connect all connectors
rightly again

Sensor wiring harness interfered

Check whether sensor connected wire
connect exhaust pipe and muffler

5

No warning tone
when

opening,

others

work

normally and no
warning tone

Combination

meter

fault

(Buzzer

is

integrated in combination meter)

Check combination meter connected
wire

and

connector,

connect

combination meter again rightly

Replace combination meter

Gear “R” switch

Buzzer

Radar
controller

Reversing Radar Device

Reversing Radar Device

161

（II）Troubleshooting Flow Chart

System not work

Step

Detect content

Solution

Judging

specification

Next step

Yes

No

1

Ensure fault phenomenon

Ignition switch turn to ON, hang
transmission to reversing gear

Whether hear buzzer
warning

Deal

with

intermittent fault,
turn to next step

Turn to step
3

2

Check intermittent fault

Check and deal with reversing light
switch wiring harness connector loosen
fault.
Check and deal with combination meter
wiring harness connector loosen fault

3

Check reversing light
fuse

Dismount reversing light fuse IF20,
check whether it is fused?

Whether fuse is fused?

Replace fuse

Next step

4

Check power supply wire
of reversing radar control
module power supply

Use multimeter to measure voltage
between reversing radar control module
wiring harness connector F07-12 and
ground.

Voltage

standard:

11~14 V
Whether voltage accord
with standard?

Next step

Maintain and
check

or

replace
wiring
harness

5

Check grounding wire of
reversing radar control
module

Use multimeter to measure resistance
between reversing radar control module
wiring harness connector F07-13 and
ground.

Resistance

standard:

less than 1Ω
Whether

resistance

accord with standard?

Next step

Maintain and
check

or

replace
wiring
harness

6

Check

wire

between

reversing radar control
module and reversing light
fuse

Hang transmission to reversing gear,use
multimeter

to

measure

resistance

between reversing radar control module
wiring harness connector related pin and
reversing light fuse wiring harness
connector F07-12.

Resistance

standard:

less than 1Ω
Whether

resistance

accord with standard?

Next step

Maintain and
check

or

replace
wiring
harness

7

Remove reversing radar
control module, whether
fault is removed?

Replace new reversing radar control
module. Key turn to ON, hang
transmission to reversing gear.

Whether

can

hear

buzzer warning tone?

Fault removed.

Sensor not work

Step

Detect content

Solution

Judging

specification

Next step

Yes

No

1

Ensure

fault

phenomenon

Ignition switch turn to ON, hang
transmission to reversing gear, lay
appropriate obstacle in appropriate
distance behind vehicle.

Whether

can

hear

parking warning tone?

Deal

with

intermittent
fault, turn to
next step

Turn to step 3

2

Check

intermittent

fault

Check and deal with reversing radar
sensor wiring harness connector
loosen fault

3

Check wire between
reversing radar sensor
and reversing radar
control module

Measure

resistance

between

reversing radar sensor wiring harness
connector RB07-1 and reversing
radar control module connector F07-
1/2/3/4.

Resistance

standard:

less than 1Ω
Whether

resistance

accord with standard?

Next step

Maintain

and

check

or

replace wiring
harness

Reversing Radar Device

Reversing Radar Device

162

Step

Detect content

Solution

Judging

specification

Next step

Yes

No

4

Check wire between
reversing radar sensor
and reversing radar
controller

Measure

resistance

between

reversing radar sensor wiring harness
connector RB07-2 and reversing
radar controller wiring harness
connector F07-14.

Resistance

standard:

less than 1Ω
Whether

resistance

accord with standard?

Next step

Maintain

and

check

or

replace wiring
harness

5

Check

wire

between reversing
radar sensor and
reversing

radar

controller

Measure resistance between reversing
radar sensor wiring harness connector
RB07-4 and reversing radar controller
wiring harness connector F07-23.

Resistance

standard:

less than 1Ω

Whether

resistance

accord with standard?

Next step

Maintain

and

check

or

replace wiring
harness

6

Replace reversing
radar

sensor,

whether

fault

is

removed?

Replace new reversing radar
sensor, turn ignition switch to

“ON”, transmission hang to
reversing gear, and getting into
reversing state.

Whether can detect
obstacle?

Fault

is

removed.

Reversing Radar Device

Reversing Radar Device

163

III、Reversing Radar Controller Assembly

（I）Removal

1. Open engine cabin cover

2. Disconnect battery negative electrode Refer to “Disconnection and connection of battery electrode”

3. Remove tail door threshold assembly Refer to “Tail door threshold assembly”

4. Remove rear door threshold panel assembly Refer to “Rear door threshold panel assembly”

5. Remove rear seat cushion assembly Refer to “Rear seat assembly”

6. Remove rear seat backrest assembly Refer to “Rear seat assembly”

7. Remove backrest hinge bracket Refer to “Lower trim panel assembly of C pillar”

8. Remove lower trim panel of C pillar Refer to “Lower trim panel assembly of C pillar”

9. Remove upper trim panel of C pillar Refer to “Upper trim panel assembly of C pillar”

10. Remove left side trim panel assembly of trunk Refer to “Side trim panel assembly of trunk”

11. Remove reversing radar controller assembly

1). Disconnect reversing radar controller assembly wiring harness

connector ①;

2). Remove 2 fixed nuts ② of reversing radar controller;

（II）Installation

1. Install reversing radar controller assembly

1). Install and tighten 2 fixed nuts ② of reversing radar controller

assembly;

Tighten

torque

4~6N·m

2). Connect reversing radar controller assembly wiring harness connector ①;

2. Install left side trim panel assembly of trunk

3. Install upper trim panel assembly of C pillar

4. Install lower trim panel assembly of C pillar

5. Install backrest hinge bracket

6. Install rear seat backrest assembly

7. Install rear seat cushion assembly

8. Install rear door threshold panel assembly

Reversing Radar Device

Reversing Radar Device

164

9. Install tail door threshold assembly

10. Connect battery negative electrode

11. Close engine cabin cover

Reversing Radar Device

Reversing Radar Device

165

IV、Sensor Assembly

（I）Removal

1. Open engine cabin cover

2. Disconnect battery electrode Refer to “Disconnection and connection of battery electrode”

3. Remove rear side combination light assembly Refer to “Rear side combination light assembly”

4. Remove rear bumper assembly

5. Remove sensor assembly

1). Disconnect sensor assembly wiring harness connector;

2). Rotate clamp ring, and take down lock catch ①;

3). Take down rubber cushion ② with shrapnel, and take down

sensor ③ from outside;

（II）Installation

1. Install sensor assembly

1). Install sensor ③ from front bumper, and install rubber cushion

② and clamp ring ① along wiring harness of sensor itself in

turn;

2). Press sensor and rotate clamp ring ① clockwise at the same time to make rubber cushion fit with rear bumper rightly;
△ Note Must align triangle mark of clamp ring to triangle mark of sensor assembly, thus it can tighten rightly.

Reversing Radar Device

Reversing Radar Device

166

3). Connect sensor wiring harness connector;

2. Install rear bumper assembly

3. Install rear side combination light assembly

4. Connect battery negative electrode

5. Close engine cabin cover

Wiper and Washer Device

Wiper and Washer Device

167

Wiper and Washer Device

I、Summary

（I）Structure Overview

Wiper system:

Wiper has four control mode: high speed, low speed, intermittent and inching. Wiper switch is on right side operating lever of

turning column. Front wiper system consists of wiper switch, washing liquid pot and motor, front wiper connecting rod mechanism,

front wiper motor, wiper arm and wiper blade. Rear wiper system consists of rear wiper switch, washing liquid pot and motor, rear

wiper motor, wiper arm and wiper blade.

Washer System:

Washer system consists of window cleaner, washing pipe, washing liquid pot and washing motor assembly, front spraying nozzle,

rear spraying nozzle and washing switch. Washing liquid pot is installed under right front headlight, wiper motor is fixed on washing

liquid pot, washing motor sends washing liquid to front spray nozzle or rear spray nozzle through washing water pipe.

Component Position

1. Washing liquid pot and motor assembly 5. Front wiper arm, wiper blade

2. Front washing water pipe assembly 6. Rear wiper water pipe assembly

3. Front wiper motor assembly 7. Rear wiper arm and blade

4. Front wiper connecting rode mechanism assembly 8. Rear wiper motor assembly