Geely Diagnosis Flow. Manual part — 102

405

No.305 Diagnoses to the ABS system failure

Flow chart of ABS malfunction diagnosis

Incidental malfunction

Continuous malfunction

Clear the malfunction
code

Carry out the maintenance by reference to the

incidental trouble diagnostic gist

Record the malfunction

code

Carry out the maintenance by reference to the malfunction code

malfunction diagnostic gist

Clear the malfunction

code

The key switch is power off, dismount the malfunction

diagnosis instrument

Real car driving inspection

End

Start

Connect the malfunction diagnosis instrument under

the power off condition

Turn the key switch to "ON"

Enter into the ABS system at the address location

Can it communicate?

Carry out the inspection refer to the

malfunction code free malfunction

Enter into the malfunction inquiry system at the

function location

Normal

No

Yes

406

No.306 Quick index list of malfunction clearance

Index of malfunction code malfunction check list

Diagnostic code

Malfunction description

Diagnostic content

Check list No.

65535

Electronic control unit

Damaged

01276

ABS hydraulic pump

The motor is out of service

1

00283

Left front wheel sensor

00285

Right front wheel sensor

00290

Left rear wheel sensor

00287

Right rear wheel sensor

Electro and mechanical failure

2, 3, 4

01044

ABS code error

5

00668

Power supply terminal 30

6

01130

Abnormal in ABS operation

The signal is unreasonable

7

No.307 Index of malfunction code free malfunction check list

Malfunction status

Check list No.

Turn the ignition switch to "ON" (the engine is in stall state) and the ABS alarm lamp does not light up

1

The alarm lamp does not light off when the engine starts up

2

Braking forces at both sides are unequal

The braking force is inadequate

ABS is in operation when the brake pedal is stamped slightly (the vehicle is
in stationary state)

ABS is in operation when the brake pedal is stamped slightly (the vehicle is
in driving state)

ABS is in abnormal
operation

The brake pedal vibrates violently when the ABS is in operation

3

The brake pedal stroke is too long

4

Very big force is required to stamp the brake pedal

5

There is no malfunction code output (communication with the malfunction diagnosis instrument is
unavailable)

6

407

No.308 Malfunction check list of malfunction code

1

Malfunction code: 01276

Possible cause

[Description]

When the speed exceeds 20km/h, the ABS ECU will monitor abnormal

operation of the motor, then a malfunction code will be recorded.
[Prompt] When this malfunction code is displayed, it means the harness between the
motor and ECU is loose. Function test of the hydraulic unit of the failure diagnosis
instrument can be used to drive the motor to carry out the test.

z

The power is broken or
earthed

z

The motor harness is loose

z

The motor is damaged

Note:
The motor is incapable of being driven if the battery is of excess discharging, so the battery voltage must be
confirmed to be normal before the motor driving test is made. The vehicle must be at the stationary state
when the motor driving test is made.

Unplug the motor harness and connect
the battery power directly to the motor
plug, does the motor still operate?

Inspect the fuse and the ABS ECU joint

Connect the motor harness
Turn the ignition switch to "ON"
Clear the trouble code
Carry out the hydraulic control unit diagnostic
using the failure diagnosis instrument

Does the failure recur?

Refer to "gist of incidental trouble
maintenance"

Replace the hydraulic control unit

Replace the fuse or the harness

Replace the electronic control unit

Abnormal

Abnormal

Yes

Normal

Normal

No

408

No.309 The malfunction codes are 00283, 00285, 00290 and 00287

(mechanical malfunction)

2

Malfunction codes: 00283, 00285, 00290 and 00287 (mechanical
malfunction)

Possible cause

[Description]

The malfunction code will appear when open circuit of the return

can not be checked out and there is no signal output when the speed is above
20km/h.
[Prompt] It may be caused by miss installation of the sensor, short of the sensor
coil or the harness, ultra large air gap between the sensor and the tooth ring, or the
damage or the tooth ring.

z

Miss installation of the sensor

z

Short of the sensing coil or the harness

z

Ultra big of the air gap between the
sensor and the tooth ring

z

Miss installation of the tooth ring

z

Malfunction of ABS ECU

Is the sensor installation correct?

Inspect the sensor output voltage at
the ABS25 core socket

Inspect each sensor

Inspect each sensor tooth ring

Inspect the wheel bearing
clearance

Inspect the sensor output voltage at
the ABS25 core socket

Install it correctly

Inspect if the sensor resistance is normal

Replace ABS ECU

Replace it

Repair or replace

Abnormal

Normal

Replace it

Abnormal

Abnormal

Abnormal

No

Yes

Normal

Normal

Normal