Geely Emgrand X7. Manual part — 96

2.5.7 diagnostic message and steps

2.5.7.1 Diagnosis descriptions

Refer to 2.5.2 Description and Operation, get familiar with the system functions and operation
before starting system diagnosis, so that it will help to determine the correct diagnostic steps, more
importantly, it will also help to determine whether the situation described by the customer is
normal.

2.5.7.2 Visual inspection

z Inspect the after-service retrofitting device that may affect the engine anti-theft system.

z Check the system components that is easy to access to identify whether there is significant

damage or potential faults.

z If the system shows the engine is locked, prior to the fault diagnostic Inspect and confirm

whether the ignition key completed self learn, otherwise carry out the ignition key learn
process.

2.5.7.3 Anti-theft Engine Control Module Connector List

NL02-2189b

1

2

4

6

8

3

5

7

IP24 发动机防盗控制模块线束连接器1

Terminal
No .

Terminal
Definition

Wiring

Rated
Working
Voltage

Working
Current

Terminal
descriptions

1 +B

O/Y

12V

Less than 200
mA

Less than 50
mA

2 GND

B 0V

Less than 200
mA

Ground

3 Ceiling

lamp

W/R

12V

Less than 50
mA

Anti-theft
indicator of
engine

4 ON

G/R

12V

Less than 200
mA

Ignition Switch
Signal

5 To

R-Line

L 12V

Less than 50
mA

Engine Control
Module

IP24Engine anti-theft control module harness

connector1

383

Request Signal

6 —

— —

— —

7 To

K-Line

Gr/P

12V

Less than 200
mA

Diagnostic
Information

8 W-Line Gr/W

12V

Less than 200
mA

Communication
with the Engine
Control Module

NL02-2190b

IP25 发动机防盗控制模块线束连接器2

1

2

3

Terminal
No .

Terminal
Definition

Wiring

Rated
Working
Voltage

Working
Current

Terminal
descriptions

1 COIL

A W/G

125 KHz
Modulation
Waveform

—

Antenna
Signal

2 COIL

B Gr/O

125 KHz
Modulation
Waveform

—

Antenna
Signal

3 GND

B 0

V

— Ground

IP25Engine anti-theft control module harness

connector2

384

2.5.7.4 Fault diagnostic code (DTC) table

DTC

Code Meaning

Fault Cause Trouble-shooting

Method

9000

Antenna Failure
(Tested Only at
Reading Anti-theft
Transponder, other
than Continuously
Tested).

EAS Coil Open
circuit or short;
anti-theft controller
internal failure.

1. Inspect the connection between

the EAS Coil and the Anti-theft
controller jointer.

2. Inspect the EAS Coil plug

harness for breaking off or
collision.

3. Pluck off the EAS Coil plug and

measure the resistance between
IP25 terminal #1 and IP25
terminal #2 with the resistance
scale of the multimeter. The
normal value is about 10-20 Ω,
and if the resistance value
approaches zero, the coil is
short. If the resistance coil is
open, measure the resistance
between IP25(1) and IP25(3),
and between IP25(2) and
IP25(3). The normal value
should be infinity, otherwise the
coil is short or leaky.

4. If the coil has no fault, inspect

the anti-theft controller with the
interchange method to replace a
matched new or reset anti-theft
controller. Insert the key into
the steering lock and turn to
“ON” to read the fault code. If
no DTC 9000 is shown, it
indicates that there is certain
fault in the anti-theft controller.
Then use the replaced new
controller to repeat the
matching.

B040

W line Error, no
electric injector
response

No electric injector
controller response
was received after
anti-theft controller
sending the
communication
request.

1. Inspect whether anti-theft

controller IP24 wire harness
connector is plugged well.
Inspect whether IP24 terminal 8
(W line) and ECM wire harness
are well connected, without
short-circuit or bad connection.
Inspect ECM.

2. Wire harness and connector are

connected well.

3. Replace the anti-theft device

and Inspect the above
mentioned faults. If no fault
occurred, the problem can be
deemed as within the anti-theft

385

device.

4. Replace the ECM and inspect

the above faults. If no fault
occurred, the problem can be
deemed as within the ECM.

B402

W line short to
ground,

W line is short to
the ground

1. Inspect the contact between the

IP24 plug harnesses of the
anti-theft controller;

2. Inspect the short circuit of the

harness between the IP24
terminal 8 (W line) and the
electric injector.

3. Replace the anti-theft controller

and inspect the above
mentioned faults. If no fault
occurred, the fault can be
deemed within the anti-theft
controller.

4. Replace the ECM and inspect

the above faults. If no fault
occurred, the problem can be
deemed as within the ECM.

B403

W line short to
power Supply

W line is short to
the anode of the
battery .

1. Inspect the contact between the

IP24 harnesses of the anti-theft
controller

2. Inspect if the harness between

the IP24 terminal 8 and ECM is
short to the battery anode.

3. Replace the electric anti-theft

controller and inspect the
above-mentioned problems. If
no problem occurred, the
problem can be deemed as
within the electric anti-theft
controller.

4. Replace ECM, and inspect

whether above faults exist.

If not, it can be deemed that the
electronic fuel injection faults.

B055

No Key was
Detected

Missing
transponder in the
key or damaged
transponder or
damaged EAS Coil
results in that the
anti-theft controller
can not receive the
response from the
transponder.

− Inspect whether there is a

transponder in the key.

−

Inspect whether the EAS Coil is
normal.

− Replace

the

transponder.

386