Lifan 720 (1.8 VVT) Electrical Manual — part 1

1

Introduction

LIFAN 720

BCM

I32

18

I34

32

I34

31

I34

24

I34

4

ID2

11

11 BD2

BH

4

4 LH

I32

17

ID2

5

5 BD2

Back Door Switch

4 L2

3 L2

G17

G10

Key Insert Switch

2 I6

2 I6

Anti-Thef Alarm

1 I24

3 I24

G08

G08

1 B10

2 D5

1 D5

5 D5

3 D5

4 D5

6 D5

Left Front Door Lamp Switch

1 B6

Right Front Door Lamp Switch

1 B13

Left Rear Door Lamp Switch

1 B8

Right Rear Door Lamp Switch

I32

24

IH2

10

10 DH2

DH1

14

14 ID1

DH1

9

9 ID1

I32

22

IH2

11

11 DH2

I32

23

IH2

12

12 DH2

I34

2

I34

1

IH2

9

9 DH2

I32

16

ID1

10

10 BD1

I32

15

ID2

8

8 BD2

I32

14

I32

4

ID1

15

15 BD1

Close

Open

M

LF Lock Motor

M

D11

RF Lock Motor

2

D11

1

M

D17

LR Lock Motor

2

D17

1

M

D22

RR Lock Motor

2

D22

1

DG2

12

12 BG2

DG2

13

13 BG2

BD2

22

22 ID2

DG1

14

14

3

3

BG1

DG1

15

15 BG1

M

L2

Trunk Lock Motor

3

L2

2

LH

5

5 BH

BD1

9

9 ID1

I34

3

IMMO Indicator

Refer to

Instrument Cluster

Refer to

SRS

Collision Broken

Fuel Signal

I34

21

B+

FS 27

20A

FS 17

20A

IC

12

12 I1C

IB

5

5 I1B

I/P Fuse and Relay box

Breaker

I32

1

0.50 Br

0.50 Br/R

0.50 Br/B

0.50 O/W

0.50 O/W

0.50 Br/V

0.50 Br/V

0.50 Br/V

0.50 Br/V

0.50 Br/V

0.50 Br/P

0.50 Br/P

0.50 Br/P

0.50 Br/P

0.50 Br/R

0.50 Br/R

0.50 Br/R

0.50 B

1.00 B

0.50 B

0.50 Br/P

0.50 Br/P

0.50 Br/Gr

0.50 Br/Gr

I34

20

I34

19

I33

23

I33

9

SF

1

1 I9

DH4

IH4

0.50 B/Bl

0.50 B/Bl

0.50 B/G

0.50 B/G

0.50 B/W

0.50 B/W

0.50 B

0.50 B

0.50 V

0.50 B/W

0.50 B/W

0.50 B/Y

0.50 B/Y

0.50 B/P

0.50 B/W

0.50 B/V

0.50 B/V

0.50 Br/W

0.50 B/Br

0.50 B/Br

0.50 B/Br

DH4

2

2 IH4

BD2

21

21 ID2

Central Lock and Theft Deterrent System

1

9

12

10

2

3

8

4

5

7

6

11

2

Introduction

LIFAN 720

1. System name.
2. Harness connector naming.
In this manual, the harness connector naming is

based on harness. For example, I/P connector

is named as I23. I is the harness code, 23 is

the connector number.
The table below lists all harness:

Note：

1 Door harness includes four door

harnesses.

2 For hareness connector details, please

refer to connector location views.

3. Component name.
4. System information.
5. Harness to harness connector.The character

in the box is the connector code.

6. Wire color and diameter. The following table

showes the color code.

If a wire has two colors, the first character shows

the background color and the second shows the

stripe color, divided by

“/”.

For example,

YE/WH means yellow background

color with white stripe.

7. Pin number. The connector pin numbers are

mirrored to the ones that connect to them, as

shown below:

8. Ground number. The ground number starts

with G. For ground details, please refer to

ground location views.

9. Fuse supply. +B represents battery power

supply. ACC represents power supply when

ignition switch is at “ACC” position. IG2

represents power supply from terminal 4

when ignition switch is at “ON” position. IG1

Code

Harness

Engine compartment harness

U--

E

S

U

I

B

Engine compartment harness

connector

Engine harness

E--

Engine harness connector

Instrument panel harness

I--

Instrument panel harness connector

Body harness

B--

Body harness connector

D

Door harness

D--

Door harness connector

Airbag harness

S--

L
L--

Airbag harness connector

Bak door harness connector

Back door harness

R
R--

Roof harness connector

Roof harness

A
A--

EPS harness connector

EPS harness

F

Right floor harness

F--

H
H--

Right floor harness connector

Rear vehicle body harness connector

Rear vehicle body harness

V
V--

Reverse radar harness connector

Reverse radar harness

Bl

Blue

G

Green

Gr

Grey

O

Orange

P

Pink

R

Red

V

Purple

W

White

Y

Yellow

1

2

3

4

5

6

1

2

3

4

5

6

a1102002

10. Splice

11. Fuse number consists of fuse code and a

sequential number.

12. Grey shade means fuse and relay box.

Not Spliced

Spliced

a1102003

represents power supply from terminal 2

when ignition switch is at “ON” position.

Color Code

Wire Color

Legend

Black

B

Brown

Br

3

Symbol

LIFAN 720

Switch-Normally

Open

Switch-Normally

Closed

Double Throw

Switch

h

c

ti

w

S

n

o

it

i

n

g

I

r

e

t

a

e

H

Battery

Capacitor

Cigarette Lighter

Antenna

Light Load

Fuse

Mederate Load

Fuse

Heavy Load

Fuse

Ground

Ignition Coil

Knock Sensor

Relay-Normally

Closed

Relay-Normally

Open

Double Throw

Relay

Resistor

Potentiometer

Rheostat

Temperature

Sensor

G7

Solenoid

Solenoid

Wire Direction

Limit Switch

e

c

il

p

S

e

c

il

p

S

o

N

M

Diode

Starter

Photodiode

M

Bulb

UTP

(Unshielded

Twisted Pair)

Horn

Light Emitting

Diode

Motor

M

M

M

Oxygen Sensor

Airbag

Clock Spring

Low Speed Fan

Relay B

Fan Assembly

a1104002

4

Circuit Diagnosis

LIFAN 720

2. Test Light with Self-supply and Ohmmeter

Use test light with own 12V power supply or

ohmmeter to test the circuit continuity. Test

light comprises a bulb, battery and a pair of

wires. The bulb will be lit when the two wires

contacted. Before test, disconnect the battery

negative and pull out the fuse of the circuit to

be tested. To test the circuit continuity,

contact two wires to the two measurement

points. If the bulb is lit, it means the circuit is

continuous.

Warning ：DO NOT use test light with self-

supply to test the control module. To do

so, it could damage the circuit inside the

control module. Please use a ohmmeter

with 10M Ω or higher internal impedance.

Ohmmeter has the same usage method as

voltmeter, but ohmmeter can show the

impedance value. The lower impedance, the

better continuity.

3. Jumper with Fuse

Use jumper to test a broken point for open

loop circuit (circuit broken). The jumper

should be in tandem with the circuit to be

tested.

Warning ：To protect the circuit, DO NOT

use the fuse with higher rated capacity

than the circuit to be tested. DO NOT use

the jumper as the input or output signal

when a control module like ECM, TCM is in

the circuit. To do so, it could damage the

circuit inside the control module.

Fault Test

1. Voltage Test

Voltage test process is to test the voltage at a

certain point. When testing the connector

terminals, insert the positive probe into the

wire instead of breaking the harness.
1 When testing the voltage with test light or

voltmeter, connect the negative wire of

the test light or the negative probe of the

voltmeter to the ground.

2 Connect the other wire of the test light or

the positive probe of the voltmeter to the

place to be tested.

a1105002

5A

a1105003

I/P Fuse and Relay Box

Switch

Solenoid

Test Light

Voltmeter

5A

+B

0.5RD

0.5G

2 E00

1 E00

1 C00

a1105022

Circuit Diagnostic Procedure

Refer to the following procedure for the circuit

diagnosis:
1. Confirm the Fault

To do the proper repair, confirm the fault

descibed by the customer firstly. Inspect the

relevant component carefully and make

record. DO NOT disassemble the component

before confirmation of the fault scope and

causes.

2. Read the Wiring Diagram and Analyze the

Causes.
Make a complete analysis on the faulty

components from power supply to ground

according to the sub-system wiring diagram

and determine the repair solution. If can not

determine the repair solution, please read the

system description in the “Description and

Operation” in the workshop manual to clear

the working principle. And inspect other

circuits that has common part with the faulty

circuit, for example, the fuse, ground, switch,

etc. Inspect the circuit not covered in step 1. If

other components on the common circuit

work properly, it means the fault exists in its

own circuit. Otherwise, the fuse or ground

might has faults.

3. Inspect the Circuits and Components.

Always use the wiring diagram together with

workshop manual and refer to the diagnostic

procedure for the relevant circuits or

components in the workshop manual. For the

circuit with a control module, fully use

diagnostic tools to do the test. Effective

diagnosis should be a logical and reasonable

operation. Fully use the diagnoistic

procedures in the workshop manual and start

the inspection from the most likely causes

and the compents be easiest to inspect.

4. Repair

Repair the faulty circuit. Refer to the wiring

diagram and workshop manual for fault

treatment. For example, the treatment on bad

connection to ground and the harness

connector.

5. Confirm the Fault Removed.

After repair, confirm the fault removed and all

functions work properly. For the fuse blown

fault, check all the relevant circuits.

Circuit Diagnostic Device

1. Voltmeter and Test Light

Use test light or voltmeter to check the circuit

status.
Test light comprises a pair of wires and a 12V

bulb. When inspecting, connect one wire to

the ground and the other one to the

measurement point. If the bulb is lit, it means

the measurement point has power supply.

Warning ：DO NOT use test light to test the

control module voltage. To do so, it could

damage the circuit inside the control

module. Please use a voltmeter with 10M Ω

or higher internal impedance (e.g. to test

the ECM voltage.).

Voltmeter has the same connection method

as the test light, but voltmeter can display the

voltage value of the circuit. Use a voltmeter

with high impedance to test the voltage. If the

circuit has poor connection, the voltmeter

may show the normal value, but the voltage

can not drive the load successfully.

a1105001