Haima M3. A/C, Restraint System, Body Accessories, Electrical System. Manual

Electrical System 3D-24

Maintenance Instruction

On-vehicle Maintenance
Removal Procedure of Radio-CD Player

1. Disconnect the negative cable of the battery.

Use a flat-end screwdriver to remove the
central air outlet panel.

2. Push the back of the audio panel until the

audio panel is separated from the instrument
panel (the audio panel is installed on the
instrument panel via clips).

3. Remove the connector on the back of the

audio panel.

4. Use a phillips screwdriver to remove 4 self-

tapping screws from the player host and
unplug the harness on the back of the host to
have the host removed.

Removal Instruction

1. Please handle gently in removal to protect the

audio surface and screen from being damaged.

2. When removing the connector, press the clip

at first and then pull it out. Don’t pull it
directly by force; or else the connector may
be damaged.

3. Remove the audio and keep it properly.

Assembly Method

Insert all connectors (except for the antenna, an
clear “click” sound can be heard when the
connector is installed in place).

Installation Procedure

Before installing the audio into the instrument
panel, check the audio for normal operation at first
(connect all connectors and check whether the
audio can be turned on and operate normally).

1. Push the audio host into the mounting hole and

use a phillips screwdriver to install 4 self-
tapping screws.

2. Connect the connector on the back of the audio

panel. Press the audio panel to ensure uniform
clearance around three sides (the clearance

between it and the instrument panel or A/C
controller should be 1mm); push it backward.

3. Install the central air outlet panel.

Assembly tip:

During assembly, please ensure the clearance
between the audio panel and the instrument panel
is uniform.

Door Speakers

Removal Procedure

1. Disconnect the negative cable of the battery.

2. Remove the front door trim plate by referring

to the removal method of the door inner trim
plate.

3. Remove the speaker.

 Unscrew the mounting screws from the

speaker.

 Remove the connector.

 Remove the speaker.

Installation Procedure

1. Connect the speaker power plug.

2. Tighten the mounting screws.

3. Install the front door trim plate by referring to

the removal method of the door inner trim
plate.

4. Connect the negative cable of the battery.

Tweeter

Removal Procedure

1. Disconnect the negative cable of the battery.

2. Open the front door trim triangle.

3. Remove the tweeter from the front door trim

triangle.

 Remove the connector.

 Unscrew the mounting screws from the

tweeter.

 Remove the tweeter.

Installation Procedure

1. Install the tweeter on the front door trim

triangle with mounting screws.

2. Connect the tweeter plug.

3. Connect the negative cable of the battery.

USB data line position

H o s t
c o n n e c t o r

Antenna
connection

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Electrical System 3D-25

Roof Antenna

Removal Procedure

1. Disconnect the negative cable of the battery.

2. Remove the interior ceiling.

3. Remove the roof antenna.

Installation Procedure

1. Tighten the mounting bolt of the antenna.

2. Tighten the mounting bolt of the antenna to

the torque of 6N.m±0.5N.m.

3. Connect the negative cable of the battery.

Remote Control System

Replacement of the BCM host

Removal Procedure:

1. Remove the front passenger seat and pull the

carpet away.

2. Remove

the

connector.

3. Remove 4 nuts from the BCM mounting

points.

4. Remove

the

BCM.

5. The installation is in reverse order of the

removal.

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Electrical System 3D-27

Definition of BCM Connectors

Pin Definition DescriptionPin Definition

DescriptionPinDefinitionDescriptionPin Definition Description

1 CAN_L Pulse

signal

11 Vacant

N/A

21 CAN_H Pulse

signal

31 Suitcase

request
switch

Low
potential
valid

2 Front

washer
switch
signal

High
potential
valid

12 Vacant

N/A

22 LIN

Pulse
signal

32 Overtaking

signal

Low
potential
valid

3 Front

wiper
intermitte
nt signal

High
potential
valid

13 High beam

switch

Low
potential
valid

23 Vacant N/A

Light
sensor
power
supply

+5V input

4 Vacant N/A

14 Engine

speed
signal

Pulse
signal

24 Vacant N/A

Light
sensor

Ground
terminal
input

5 Vacant N/A

15 KEY_IN Low

potential
valid

25 Rear

defroster
switch

Low
potential
valid

35 Light

sensor
signal

Voltage
signal

6 Vacant N/A

16 Collision

signal

Low
potential
valid

26 Door

status
switch

Low
potential
valid

36 Vacant

N/A

7 Vacant N/A

17 Front fog

lamp
switch
signal

Low
potential
valid

27 Vacant N/A

Vacant N/A

8 Vacant N/A

18 Rear fog

lamp
switch
signal

Low
potential
valid

28 IGN High

potential
valid

38 Vehicle

speed
signal

Pulse
signal

9 Vacant N/A

19 Small

lamp
switch
signal

Low
potential
valid

29 Auto

lighting
signal

Low
potential
valid

39 Central

lock
switch

Low
potential
valid

10 Vacant

N/A

20 Emergency

lamp
switch
signal

Low
potential
valid

30 Trunk

sensor
switch

Low
potential
valid

40 Headlamp

signal

Low
potential
valid

10PIN terminal block (white)

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Electrical System 3D-28

Definition

Description

Definition Description Pin

Definition

Description

High beam Low potential 9

Vacant

N/A

Vacant

N/A

Vacant

N/A

Horn relay Low 18

Low beam Low potential

Left turn

Low potential 11

Vacant

N/A

Low beam Low potential

Vacant

N/A

Vacant

N/A

Rear Low

potential

Wiper High

Key ring Low

Vacant

N/A

Vacant

N/A

Vacant

N/A

Vacant

N/A

Vacant

N/A

Vacant

N/A

Vacant

N/A

Vacant

N/A

Small Low

Vacant

N/A

Definition

Description

Definition

Description

W-A1

Vacant

N/A

W-A9

Vacant

N/A

W-A2

Vacant

N/A

W-B1

Ground wire

Ground terminal
input

W-A3

Vacant

N/A

W-B2

Vacant

N/A

W-A4

Vacant

N/A

W-B3

Wiper intermittent
output

High potential
output

W-A5

Vacant

N/A

W-B4

Wiper return
output

The return is low
potential

W-A6

Vacant

N/A

W-B5

Back door open

High potential
output

W-A7

Vacant

N/A

W-B6

Vacant

N/A

W-A8

Right turn signal
lamp switch

Low potential
valid

24PIN terminal block (white)

15PIN terminal block (white)

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Electrical System 3D-29

Definition

Description

Definition

Description

B-A1

Interior lamp
output

Low potential
valid

B-A9

Right turn signal
lamp output

High potential
output

B-A2

Vacant

N/A

B-B1

Large current
ground wire

Ground terminal
input

B-A3

BAT(FUSE)

+12V constant
electricity input

B-B2

Front fog lamp
output

High potential
output

B-A4

Rear fog lamp
output

High potential
output

B-B3

Door locked

High potential
output

B-A5

Daytime running
lamp

High potential
output

B-B4

Door unlock

High potential
output

B-A6

Vacant

N/A

B-B5

Vacant

N/A

B-A7

Left turn signal
lamp output

High potential
output

B-B6

BAT(F/L)

+12V constant
electricity input

B-A8

Vacant

N/A

15PIN terminal block (white)

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Electrical System 3D-30

Function Description

1. Turn signal lamps and hazard warning

lamps

Operating conditions: the turn signal lamps can be
operated when the key is located at ON position;
the hazard warning lamps can be operated no
matter where the key is located.

1. Left/right turn signal function

After the turn signal lamp switch is turned on, the
turn signal lamps come on with the flickering
frequency of 75±10c/min and the on-load factor of
50% (±5%); they stop flickering when the switch is
turned off.

2. Bulb burnout warning

When only one main bulb (21W) is burnt out, the
flickering frequency of the turn signal lamps is
150±10c/min (turn signal lamps: 21W×4, 5W×2)

3. Emergency

signal

With the hazard warning lamp switch pressed, the
left and right turn signal lamps flicker at the normal
operating frequency. With the switch pressed again,
the left and right turn signal lamps stop operating.
In case of an collision, the airbag ECU sends a
continuous 200ms low level to the BCM to control
the hazard warning lamp operate at the normal
frequency. If the hazard warning lamp switch is
pressed at this time, the BCM controls the hazard
warning lamp go out.

Note: The collision signal (a continuous 200ms low
level) is provided by the airbag ECU via the hard
wire. In normal condition, the signal provided by
the airbag ECU to the BCM is a high level signal.

Front/rear fog lamps

1. With the small lamps on, when you press the

front fog lamp switch, the front fog lamps
(35W×2) starts to operate. When you press
the switch again, the front fog lamps stop
operating. When the small lamps are turned
off, the front fog lamps stop operating also.

2. With the low beams or front fog lamps turned

on, when you press the rear fog lamp switch,
the rear fog lamps (21W×2) starts to operate.
When you press the switch again, the rear fog
lamps stop operating. The rear fog lamps can
be turned off irrespective of the status of other
lamps. They can operate continuously until
the small lamps are turned off. They are
located in off status until being turned on
again.

Rear fog lamps

With the low beams turned on, when you press the
rear fog lamp switch, the rear fog lamps starts to
operate. When you press the switch again, the rear
fog lamps stop operating. The rear fog lamps can be
turned off irrespective of the status of other lamps.
They can operate continuously until the small
lamps are turned off. They are located in off status
until being turned on again.

Daytime running lamps

When the engine speed signal is detected, the BCM
makes the daytime running lamps (19W×2) come
on; when the small lamps come on, the daytime
running lamps goes out.

Note: For the MT Elite Model, the MT Luxury
Model, the MT Flagship Model and the AT Models:
the engine speed signal is provided by the engine
ECU via the CAN line. Refer to the signal list for
details.

For the Standard Model and the MT Comfortable
Model: the engine speed signal is provided by the
engine ECU via the hard wire; the signal is the
square signal with the duty cycle of 50%; the
correspondence between the engine speed and the
frequency is shown as follows:

Actual Engine Speed

Frequency

0 0

1000 33.3Hz

2000 66.7

3000 100

4000 133.3

4. Ignition

key

illumination

The ignition key lamp is connected with the
normally live electricity.

When the door open signal is detected by the BCM,
the ignition key lamp comes on and then goes out
in 5min. If the door is closed within 5min, the
ignition key lamp goes out in 30s. With the ignition
key lamp on, if you insert the key into the ignition
lock, the lamp goes out. With the ignition key lamp
off, if the door is open and the key is not inserted,
the key lamp comes on again.

5. Interior

lamp

The interior lamp is connected with the normally

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Electrical System 3D-31

live electricity;

With the interior lamp switch located at Door status,
after the remote unlocking or the key is pulled out,
the interior lamp comes on immediately and then
goes out in 15s (going out gradually within 3-5s).
Within the 20s, if the BCM receives the remote
locking signal, it makes the interior lamp go out
immediately; the door opening/closing has no
impact on the interior lamp; if the key is turned to
ON position, the interior lamp goes out gradually
within 3-5s. With the interior lamp off, the interior
lamp comes on immediately if any door is open,
and it goes out gradually within 3-5s if the door is
closed.

Note: the four-door status signal is provided by the
combination instrument via a hard wire.

The “four doors open” is a low level signal and the
“four doors closed” is vacant.

6. Control of small lamps and low/high beams

When the combination switch is located at the
“small lamp” position, the BCM makes the small
lamps come on.

When the combination switch is located at the
“headlamp” position, the BCM makes the small
lamps and low beams come on.

When the combination switch is located at the
“headlamp” position and the switch is located at the
“high beam” position, the BCM makes the small
lamps, low beams and high beams come on.

When the dimmer switch is turned on, the BCM
makes the high beams come on; when the dimmer
switch is turned off, the BCM makes the high
beams go out. (if the combination switch is located
at the “headlamp” position, the low beams won’t go
out when the dimmer switch is turned on.)

5000 166.7

6000 200

7000 233.3

8000 266.7

When the combination switch is located at the
“AUTO”, the small lamps and low beams come on;
when located at the “high beam” position, the high
beams come on.

7. Headlamp auto-delayed lighting

(follow-me-home)

Operating conditions: With the ignition switch

turned from ON to OFF and the headlamp switch
off:

1. Operate the overtaking switch twice;

2. Close all doors;

3. Lock by remote control.

When the step 1 to the step 3 is finished within 60s,
the headlamp delayed function is activated and the
low beams come on; they go out in 30s. If the
unlocking by remote control is performed within
30s and any of the doors is open and then reclosed,
the low beams are re-delayed for 30s. If the ignition
switch turned to ON position within 30s, the low
beams go out; if you want to turn on the low beams
again, you should turn the lighting switch to the
“headlamp” position.

Headlamp auto lighting

Operating conditions: with the “Auto” switch on
the combination turned on and the ignition switch
located at ON, when the sensor detects that the light
intensity is lower than 1200 lx for over 1s, it
generates signal and send it to the BCM, which
shall make the position lamps come on at first and
then make the low beams come on in 2s. When the
sensor detects that the light intensity is higher than
3700 lx for over 1s, the BCM make the low beams
go out at first and then make the position lamps go
out in 2s.

Lamp on at 1200 lx; lamp off at 3700 lx.

9. Wiper/washer

control

Operating conditions: with the ignition key located
at ON, the windshield wiper can be controlled.

1) Front wiper intermittent wiping control

When the wiper switch intermittent operation is
turned on, the wiper shall perform the low speed
operation cycle of wiping a circle with 5s pause (for
the BCM also connects with the return switch of
the wiper motor, if the wiper does not return, the
return switch shall send a high level signal to the
BCM, which shall keep the wiper motor operating
until the wipe returns. After the wiper is returned, if
the return switch sends a low level signal to the
BCM, no action shall be performed by BCM).

2) Front washer/wiper control

After the front washer switch is turned on, the
washer starts to operate and the front wipers shall
start to operate slowly in 0.5s. After the washer
switch is turned off, the washer stops operating and
the front wipers stop after 3 cycles of operation.

Note: If you operate the washer switch with the
front wiper located at the “INT” position, the
wipers shall re-operate according to the intermittent

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Electrical System 3D-32

position logic after spraying, no matter where the
wipers are located. If you operate the washer switch
with the front wipers located at “HIGH” or “LOW”
position, the wipers shall still operate at high speed
or low speed and there is no response action to the
spraying.

10. Unlocking against collision

In case of vehicle collision, the airbag ECU shall
send a 200ms low level signal to the BCM via a
hard wire (see the following figure for the input
signal); at this time, if four doors are locked, the
BCM makes four doors unlocked.

Note: Under normal conditions, the airbag ECU
shall send a high level signal to the BCM.

11. Central remote control

1) Locking by remote control

If you press the “LOCK” button on the remote
controller within 10m distant from the vehicle, the
turn signal lamps flicker once and all doors are
locked.

2) Unlocking by remote control

If you press the “UNLOCK” button on the remote
controller over 10m distant from the vehicle, the
turn signal lamps flicker twice and all doors are
unlocked.

3) Failed locking by remote control

When the doors are insecurely closed, if you press
the “LOCK” button, the BCM shall make the door
lock motor perform locking and then unlocking,
with the turn signal lamps flickering three times
and the horn tweeting once (the horn is on when
the turn signal lamps go out and is off after they
come on).

Note: After pressing the “LOCK (UNLOCK)”
button on the remote control, the BCM shall
control the motor to lock (unlock) immediately; if
you press it again, the BCM shall control the motor
to unlock (lock) immediately no matter whether the
operation of the turn signal lamps and horn is
finished. If this operation repeats 10 times within
30s, it is considered to be malicious; therefore, the
BCM would prohibit such action within the
following 1min; 1 min later, the central remote
control returns to normal. If the above situation
happens again, the BCM would still act according
to the above logic.

4) Locking by remote control with the trunk still

unclosed

With four doors securely closed and the trunk open,
if you press the “LOCK” button, the remote control
performs the locking successively, but the turn
signal lamps do not flicker. If four doors are not

unlocked, the turn signal lamps flicker once after
the trunk is closed.

5) Secondary

locking

1. After pressing the “UNLOCK” button, if no

door is open within 30s, all doors shall be re-
locked automatically with the turn signal
lamps flickering once.

2. After pressing the “UNLOCK” button, if any

door is open within 30s, the automatic locking
of all door locks shall become invalid.

6) Remote control failure

When the key is in the ignition lock, the remote
control function becomes invalid.

7) Locking by the vehicle speed

1. With all doors are securely closed, all door

locks shall be auto-locked when the vehicle
speed exceeds 20km/h.

2. During the vehicle running at the speed over

20km/h, if the door lock linkage at the driver
side is pulled up, it is under unlocked status.

a) If no door is open at this time, all doors shall

be auto-locked in 7s.

b) If the vehicle speed reduces to below 20km/h

within 7s, there is no action of the door lock.

c) If the vehicle speed reduces to below 20km/h

and then increases to above 20km/h within 7s,
the doors shall be auto-locked immediately
(including the situation that the vehicle speed
is 20km/h up or down repeatedly; this only
applies to the first time of speed reduction and
increase and there is no action for the
following speed change).

3. With the door linkage at the driver side is

pulled up after the vehicle stops without
flameout, all door shall be auto-locked at the
vehicle speed over 20km/h.

Note: For the MT Elite Model, the MT Luxury
Model, the MT Flagship Model and the AT
Models: the CAN wire vehicle speed signal is
received. The signal is provided by the ESP via
CAN wire.;for the Standard Model and the MT
Comfortable Model: the hard wire vehicle speed
signal is received.

The signal is provided by the combination
instrument via hard wire and it is a square signal.
The correspondence between the vehicle speed
and the frequency is shown as follows:

Displayed vehicle speed

Frequency

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Electrical System 3D-33

100

8) Unlocking

after

stopping

With the doors locked, when the ignition switch is
turned from ON to OFF, the doors are auto-
unlocked.

9) Car

locating

With the ignition key removed, four doors locked,
if you (within 10m distant from the car) press the
“LOCK” button twice successively within 1.3s,
the turn signal lamps shall flicker 10 times and the
horn shall alarm twice (the horn alarms when the
lamps go out and it is off when the lamps come
on).

10) Central control

If you use the key or the central control switch (or
the central control pull rod) to unlock/lock the left
front door, you can unlock/lock four doors. If one
of the doors opens, only the unlocking is
performed.

After pressing the UNLOCK/LOCK button on the
remote control, the BCM controls the
unlocking/locking of four doors.

11) The learning function should be designed

according to the following description:

1) Within 20s, the left front door switch is turned

ON-OFF-ON for 2 times or more and the
ignition key is turned from OFF to ON for 6
times, it enters the remote control transmitter
matching and learning mode: OFF-ON-OFF-
ON -OFF-ON-OFF.

2) If it enters the learning mode successively, the

turn signal lamps flicker 3 times.

3) In the learning mode, if you press the

“UNLOCK” and “LOCK” buttons
simultaneously, the turn signal lamps flicker 5
times, indicating the learning successively
done. At most 2 remote control transmitters
can be learnt for a car.

4) When the doors are closed or the key is turned

to ON, it retreats from the learning mode,
with the turn signal lamps flickering once.

5) The learning mode shall last 15s at most. It

shall retreat from the learning mode
automatically in 15s or after two keys are
learnt, with the turn signal lamps flickering
once.

6) If one of the two learnt keys is lost and you

want to re-learn a new key, the key not lost
should be re-learnt together with the new one.

120

109

140

128

160

146

180

164

200

182

220

201

12) Learning function (Tape-out learning scheme)

1) After the BCM receives the key learning

message from the diagnostic instrument, it
enters the remote control transmitter matching
and learning mode.

2) If it enters the learning mode successively, the

turn signal lamps flicker 3 times.

3) In the learning mode, if you press the

“UNLOCK” and “LOCK” buttons
simultaneously, the turn signal lamps flicker 5
times, indicating the learning successively
done. At most 2 remote control transmitters
can be learnt for a car.

4) The learning mode shall last 15s at most. It

shall retreat from the learning mode
automatically in 15s or after two keys are
learnt.

5) If one of the two learnt keys is lost and you

want to re-learn a new key, the key not lost
should be re-learnt together with the new one.

13) Trunk control

1) After pressing the remote control trunk

unlock button for over 2s, the BCM controls
the trunk to unlock if the trunk is closed. After
the trunk is closed, its locking shall be
controlled by the mechanical lock.

2) After pressing the trunk switch, the BCM

controls the trunk to unlock if it is closed.

12. CAN

function

Perform the communication via the CAN wire, the
engine ECU, the ESP, the combination instrument
and the fault diagnostic instrument.

13. Sleep/awakening

function

With the ignition switch located at OFF, the BCM
performs the locking successfully after receiving
the remote control locking signal or the central
control locking signal; under this condition, if
within 3min, the BCM has not received any of the
following signals, viz. the remote control
unlocking signal, the central control unlocking

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Electrical System 3D-34

signal, the key-in-ignition lock signal, the hazard
warning lamp signal, the small lamp switch signal,
or the CAN signal, it enters the “SLEEP” mode
automatically, with the static current less than
6mA. If there is any awakening signal input, the
BCM shall retreat from the “SLEEP” mode within
100ms and enter the normal operation mode.

Awakening signals include: the remote control
unlocking signal, the central control unlocking
signal, the key-in-ignition lock signal, the hazard
warning lamp signal or the CAN signal.

Immobilizer System

Removal/Installation of Immobilizer

1 System

Description

1.1 System

Components

The engine immobilizer system consists of the
following three parts: the immobilizer controller,
the key with embedded transponder and the
immobilizer coil.

1.1.1 Transponder

Each key has a transponder, which is a passive
electronic chip. During the system operation, it
works together with the coil to complete the
encryption and authentication between the
transponder and the immobilizer controller. The
effective information transmission distance of the
transponder is 2cm-3cm. The transponder is a
passive component, without being powered by the
battery. The above figure shows the transponder in
kind and its mounting position in the key.

Notice:

Because the transponder key is a precision
component, please pay attention to the following
points in use:

 Don’t throw or tap the key, or do other

actions to produce sudden impact on it.

 Don’t keep the key in high temperature

condition for a long time.

 Don’t put the key into the washer for cleaning.

 Don’t keep the key in the magnetic or

electromagnetic environment

1.1.2 Immobilizer

coil

The immobilizer coil, mounted on the ignition
lock cylinder, is connected with the immobilizer
controller via the harness, which undertaken the
transmission of signals and energy between the
immobilizer controller and the transponder.

1.1.3

Immobilizer controller (IMMO)

The immobilizer controller is a electronic
control module consisting of the
microprocessor and various semiconductor
components and is the core component of the
immobilizer system.

1.2 Electrical Schematic Diagram

1.3 System Operating Principle

After the key with a transponder is inserted into the
ignition lock and it is turned from OFF to ON, the
immobilizer controller is awakened entering the
wireless authentication status; at this time, the
immobilizer controller outputs energy and data to
the transponder via the coil. The transponder that
installed in the key receives the wireless signal and

Key with embedded

transponder

Immobilizer
coil

Immobilizer
controller

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Electrical System 3D-35

transmits the encrypted ID signal back to the
controller via the coil. The controller decodes the
signal and compares the received ID with the
internal stored ID. If they are the same, the
wireless authentication is passed. If not, the
controller ends the identification and enters the
sleep mode.

After passing the wireless identification, the
immobilizer controller and the engine ECM will
conduct the mutual encryption and authentication.
They will compare the stored PIN with the key
respectively. If they are the same, the ECM can
start the engine successfully. If different, the ECM
won’t start the engine.

1.4 Immobilizer Indicator Lamp

The immobilizer indicator lamp, which is
controlled by the immobilizer controller, can
display different status of the immobilizer system:

(1)

After the vehicle is electrified and the key
is located at ACC, the immobilizer
controller is still under the standby mode;
at this time, the indicator lamp comes on
at the frequency of 0.2Hz.

(2)

With the key turned to ON, if the
authentication between the immobilizer
controller and the key fails, the indicator
lamp flickers at the frequency of 2Hz.

(3)

With the key turned to ON, if the
authentication between the immobilizer
controller and the ECM fails, the
indicator lamp flickers at the frequency of
0.33Hz.

(4)

With the key turned to ON, if the
authentication succeeds, the indicator
lamp goes out.

2 Harness

Connector

The immobilizer controller is equipped with a 8-
pin connector, shown as follows:

Schematic Diagram of the 10-Pin Connector of the

Immobilizer Controller

The 10-pin connector is connected with the female

terminal of the vehicle harness. The definition of
pins are listed as follows:

Terminal a of the coil

Positive power supply

Ignition switch

ECM communication (W-line)

ECM communication (R-line)

Terminal b of the coil

Ground

Low side driver

Vacant

System diagnosis (K-line)

3 Maintenance

Instruction

3.1 Immobilizer

Coil

Removal Procedure:

1. Remove the steering column cover.

2. Remove the connector at the immobilizer coil

end.

3. Remove the immobilizer coil from the ignition

lock.

The installation is in reverse order of the removal.

3.2 Immobilizer Controller

Removal Procedure:

1. Disconnect the negative cable of the battery.

2. Remove the harness connector of the

immobilizer controller.

3. Remove the harness connector of the

immobilizer coil.

4. Remove the bolts from the immobilizer

controller.

5. Remove the immobilizer controller.

Installation Procedure:

1. Inst ct the harness connector of the

immobilizer coil.

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Electrical System 3D-32

Diagnostic Procedure

If the vehicle is sent back to the maintenance center, check whether the battery voltage is between 9V-
16V. If it is, go to the next step; if not, charge the battery to the voltage of 9V-16V and then go to the
next step.

Next step

Turn the key to ON and connect with the diagnostic instrument to establish the communication with
the IMMO. If the disgnostic instrument can read out the IMMO message, go to the next step; if not,
check the connection between the diagnostic instrument and the relevant vehicle harness. Use the
diagnostic instrument to communicate with other modules to ensure whether it is normal. If it is
normal, go to the step 6; if not, contact with the diagnostic instrument supplier.

Use the diagnostic instrument to read the IMMO fault code and record it. After finished, clear the DTC

and turn the key to OFF.

Disconnect the diagnostic instrument, repeat the steps 2 and 3 and compare the recorded DTCs.
If the DTC reoccurs, go to the step 7 by referring to the DTC Analysis List“ in the Chapter 7.
If the DTC does not reoccur, go to the next step.

Restart the vehicle. If it can be normally started, go to the step 9.
If it cannot, go to the next step.

By referring to the DTC Analysis List“ in the Chapter 6, if the fault symptom is already described in
the list, go to the next step; if not, check the other components related to the vehicle starting.

Perform the thorough troubleshooting for the system; replace parts or components and conduct the
system matching, etc.

Disconnect the diagnostic instrument and restart the vehicle to check whether the system operation is
normal or not. If it is normal, go to the next step; if not, go to the step 7.

Reconnect the diagnostic instrument and clear the IMMO or ECM DTCs. End

Next step

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Electrical System 3D-33

DTC Analysis List

DTC Corresponding

Problem

B1500

The immobilizer coil short to ground

B1501

Key authentication failure

B1502

The key IDE not written in IMMO or reading key IDE failure

B1503

PIN not written or reading failure

B1504

SK2 not written or reading failure

B1506

SK1 not written or reading failure

B1507

Open circuit of the immobilizer coil

B1508

IMMO authentication ECM failure

B150A

Base station unable to communicate

B150B IMMO

unlocked

B150C

The short circuit of the immobilizer coil

U0100

The interrupted communication between the immobilizer and the ECM

Tape-out matching procedure
(this procedure only applies to the
matching of the special diagnostic
instrument LUNCH X431)

1. Scan and prepare the VIN code.

2. Establish the IMMO communication.

3. Read the radio frequency identification:

XX/XX/XX (year)

4. Read the data stream -> IMMO status: SK not

written, PIN not written, IMMO unlocked

5. Process control -> engine module test: new

ECM

6. Process control -> key test: new key

7. Write data -> write VIN code: VIN code well

written

8. Write data -> write VIN code

(input

the default PIN code 00 00 00 00 at first):
input anew PIN code twice: writing done

9. Process control -> produce SK (input a new

PIN code): well done

10. Process control -> lock the immobilizer ECU

(input a new PIN code): well done

11. Process control -> learn ECM……(input a

new PIN code): well done.

12. Process control -> engine module test: the

matched ECM.

13. Process control -> add a new key:

14. Process control -> key test: the matched

transponder

The above listed key matching procedure applies
to the condition that the engine ECU, the
immobilizer controller and the key are all new. If
only one key requires to be added, start from the
step 13. If the key is lost, execute the “deleting
all keys” command to delete all the former
matched keys; and then add the other key not lost
via the “adding old keys” command. If it is
necessary to duplicate a new key, add it via the
“adding a new key” command.

Removal/Installation of Parking
Distance Control Host (PDC Host)
and Sensors

Removal/Installation of PDC

1. Disconnect the negative cable of the battery,

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Electrical System 3D-34

2. Remove the instrument panel.

3. Remove

the

bolt

①

4. Remove

the

connector

②

5. Remove the PDC host ③.

6. The installation is in reverse order of the

removal.

Removal/Installation of PDC Sensors /
Sheaths

1. Disconnect the connector.

2. Remove the PDC sensors.

3. Remove the PDC sensor sheaths.

The installation is in reverse order of the removal.

(The PDC sensors and the sensor sheaths are
installed on the rear bumper by clamping structure.)

After the ignition switch is turned on and the shift
lever is shifted into the reverse gear:

a) If a sensor operates abnormally, the buzzer

sounds “BI-BI”.

b) If two or more sensors operate abnormally,

the buzzer sounds “BI-BI-BI” and the system
does not operate; therefore, you should check
the sensors for any damage, wrongly wiring,
or broken wire. If there is damage, replace it
with a new one.

Rear bumper

PDC sheath

PDC sensor

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Haima M3. A/C, Restraint System, Body Accessories, Electrical System. Manual - part 8