ECU GEELY MK 2008 Owner's Guide

Abnormal
Replace HCUAbnormal
Replace HCUYes
Replace ABS ECUSection 2 ABS System CheckI. Check list of fault with fault codeNote: If storage battery is discharged excessively, it might fail to drive motor, so when conduct motor drive test,
firstly confirm whether voltage of storage battery is normal, when conduct motor drive test, vehicle must be in idle
state.MK-60 ABS system -ABS System Check5-103Fault code is 01276 1
[Description ] When vehicle speed exceeds 20 km/h, ABS ECU monitors that
motor can not work normally, it will record this fault code
[Prompt ] When this fault appears, wiring harness connection between motor
and ECU may get loose. Use hydraulic pressure unit functional
testing of fault diagnosis instrument to drive motor for this test.Possible cause

Power supply is discon-
nected or earthed

Motor wiring harness gets
loose

Motor is damaged
Pull out motor wiring harness plug, connect
battery power source directly to motor plug, see
whether motor works or not?
Check safety wire and ABS ECU joint
Connect motor wiring harness
Turn ignition switch to ON position
Eliminate fault code
Use fault diagnosis instrument to conduct
hydraulic control unit diagnosis
Whether fault recurs
Refer to "key points of occasional fault
repair"

Whether sensor is installed
correctlyYes
Install it correctlyCheck sensor output volt-
age at ABS ECU 25 chip
socketAbnormal
ReplaceCheck each wheel
speed sensorAbnormalReplace ABS ECUNormal
Replace or
repairCheck wheel bearing
clearanceAbnormalCheck wiring harnessbetween sensor andABS ECUNormalMK-60 ABS system -ABS System Check5-104Fault code is 00283, 00285, 00290, 00287 2
[Description ] when open circuit cannot be detected, there is no signal output
even if vehicle speed reaches above 20 km/h, this fault code
will appear.
[Prompt ] It is probably because that sensor is not mounted, sensor coil or
wiring harness is shorted, air gap between sensor and gear ring is
too large or gear ring is damaged.Possible cause

Sensor is not mounted

Sensor coil or wiring har-
ness is shorted

Air gap between sensor
and gear ring is too large

Gear ring is not mounted

ABS ECU fails
ReplaceCheck the pulse ringAbnormalNormal

Whether sensor is installed
correctlyYes
Install it correctlyCheck sensor output volt-
age at ABS ECU 25 chip
socketAbnormal
ReplaceCheck each wheel
speed sensorReplace ABS ECUNormal
ReplaceReplace or
repairCheck wheel bearing
clearanceCheck wiring harness
between sensor and
ABS ECUNormal
NormalMK-60 ABS system -ABS System Check5-105Fault code is 00283, 00285, 00290, 00287 3
[Description]When speed >20km/h, if sensor signal exceeds tolerance
range, this fault code will appear.
[Prompt ] It is propably because intermittent poor contact or short
circuit of sensor coil or wiring harness, gear ring is dam
aged or air gap between sensor and gear ring is too large, so
sensor signal is too weak.Possible cause

Intermittent poor contact or
short circuit of sensor coil or
wiring harness

Air gap between Sensor and
gear ring is too large or too small

Gear ring teeth is damaged

Bearing clearance is too large

ABS ECU fails
Abnormal
Abnormal
Abnormal Check the pulse ring

MK-60 ABS system -ABS System Check5-106Fault code is 00283, 00285, 00290, 00287 4
[Description]When identifiable open circuit, short circuit etc faults exist on
sensor, this fault code will appear.
[Prompt ] It might because poor contact of sensor, short circuit of coil or
wiring harness or faulty sensor signal processing circuit in ABS
ECUPossible cause

Sensor socket connector
or coil is disconnected

Sensor coil appear is
shorted

Sensor plug or wiring har-
ness is shorted with earth or
power supply

ABS ECU sensor signal
processing circuit failsCheck sensor of each wheel
Replace ABS ECURemove ABS ECU plug, check
whether resistance value between
the following terminals conforms
to standard value or not?
Standard value : 1.0-1.3K ohm¸
Left front : 45-46
Right front :33-34
Left rear : 36-37
Left rear: 42-43Check corresponding sensor
plugWhether fault recursCheck wiring harness between ECU and sensorRefer to key point for re-
pair of occasional fault Repair socket connector
Normal
No
YesAbnormal
AbnormalNormal Normal

MK-60 ABS system -ABS System Check5-107Fault code is 01044 5
[Description]When ECU software code is inconsistent with hardware
bouncing pin connection, this fault code will appearPossible cause

Bouncing pin connection
error in ABS wiring harness

Abs ecu coding error
Fault code is 00668 6
[Description]When supply terminal 30 does not supply voltage or
voltage is too high, this fault code will appear.Possible cause

Abs system fuse is blown out

Storage battery voltage is too
low or too high

ABS wiring harness socket
connector is damaged

ABS ECU is damaged
Check ABS system 30 A safety wireReplace fuse
NormalAbnormal
Disconnect connection of ABS wiring harness and ECU,
turn ignition switch to ON position, measure voltage value
between the following terminals of ABS wiring harness
Terminal 1 and 47 9.5 _ 16.5V
Terminal 32 and 16 9.5 - 16.5V
Terminal 4 and 16 9.5 _16.5VReplace fuse Normal
Check ABS wiring harness socket connectorReplace fuse Abnormal
Retry. Abnormity reoccursYes
Check storage battery voltageNormal Abnormal
NoRefer to repair of
occasional fault
Key pointsUse fault diagnosis instrument to check whether ABS ECU software
code is correct
Correct value: 040907Recode
YesNoCheck whether ABS wiring harness bouncing pin joint is connected
Bouncing pin joint : ABS ECU Pin 38and Pin 14Repair wiring harness Abnormal

MK-60 ABS system -ABS System Check5-108Fault code is 01130 7
[Description]When ABS suffers from high frequency interference of electro
magnetic wave or microprocessor thinks that input speed signal
is unauthentic, this fault code will appearPossible cause

High frequency interfer-
ence of electromagnetic
wave

Sensor is damaged or sen-
sor wiring harness is dam-
aged

ABS ECU is damagedCheck sensor output voltageReplace wheel
speed
Replace ABS ECUNoCheck sensorAbnormalCheck wiring harness
between ECU and
sensor Normal

Check ABS warning lamp
safety wire in fuse boxCheck
ABS warning lamp safety wire
in fuse boxReplace AbnormalRemove ECU joint, when igni-
tion switch is in ON, does warn-
ing lamp illuminate ?NoNormalCheck whether ABS warn-
ing lamp is burnt outYes
ReplaceCheck whether warning
lamp power supply circuit
and ground loop in wiring
harness is disconnectedAbnormalRepair wiring
harnessCheck warning lamp power
supply circuit and ground
loop socket connector in
wiring harnessAbnormalRepair socket
connectorDoes fault reoccurNoRepair wiring harnessYe s NormalNormal NoRefer to key point
for repair of occa-
sional faultII. Check list of fault without malfunction codeMK-60 ABS system -ABS System Check5-109When ignition switch is in ON position (engine stall), ABS warning
lamp does not illuminate 1
[Description ] ABS warning lamp does not illuminate, warning lamp power
supply circuit might be disconnected, bulb is burnt out or
warning lamp driving module is damaged.Possible cause

Safety wire is burnt out

ABS warning lamp bulb
is burnt out

Power circuit is discon-
nected

ABS warning lamp driv-
ing module is damaged
YesCheck whether the wire in ABS
wiring harness connecting ABS
warning lamp driving module
and ECU is shorted to ground

Note: this fault mode is only limited to the condition in which system may communicate with fault diagnosis
instrument (ABS ECU ABS ECU power supply is normal), and there is no fault code.MK-60 ABS system -ABS System Check5-110 After engine starts up, ABS warning lamp illuminates normally 2
[Description] Probably because ABS warning lamp driving module is
damaged or ABS warning lamp circuit is disconnected.Possible cause

ABS warning lamp driving
module is damaged

ABS warning lamp driving
module circuit is disconnected

ABS ECU is damagedCheck whether wire between
ECU and ABS warning lamp
driving module is disconnectedRepair wire harness Yes
NoCheck ABS warning lamp driv-
ing moduleReplace Abnormal
NormalReplace ABS ECU

Whether sensor is installed correctlyInstall it correctly Yes Check sensor output voltageAbnormal
NormalCheck each sensorAbnormal
ReplaceNormal
Check gear ring of each sensorAbnormalNormalReplace
Check wheel bearing clearanceAbnormalNormalReplace or
repair
Check ABS ECU socket and
middle socket connectorAbnormalNormalReplace
socket
connector
Does fault recurNo
YesRefer to key point
for repair of oc-
casional faultRemove ABS ECU plug, check whether resis-
tance value between the following binding
posts conforms to standard value or not?
Standard value: 1.0-1.3K ohm¸
Shake sensor wiring harness and socket con-
nector while measuring
Left front: 44-45 Right front: 33-34
Left rear: 36-37 Right rear:42-43Repair wiring
harness or socket
connector NormalAbnormalReplace ABS ECUUse fault diagnosis instrument to
conduct diagnosis of hydraulic
control unitAbnormalReplace ABS HCUMK-60 ABS system -ABS System Check5-111ABS works abnormally 3
[Description] This issue is closely related to driver condition and
road surface condition, so it is not easy to conduct
fault diagnosis. However, if there is no fault code
memory, the following inspection may be conducted.Possible cause

Sensor is not installed properly

Sensor wiring harness has problem

Sensor is damaged

Gear ring is damaged

Sensor is attached with foreign
matter

Wheel bearing is damaged

ABS HCU (hydraulic pressure unit)
is damaged

ABS ECU (electric control unit) is
damaged

Whether fault diagnosis instrument
may communicate with MK -60 ABS
ECU on other vehicleNoYesABS fault diagnosis instrument fails,
check again after repairCheck ABS power fuseAbnormalNormalReplaceWhether there is display on the screen
of fault diagnosis instrumentNoNormalCheck power cord, earth wire
and diagnosis wire in fault
diagnosis interface and their
connectionRepair fault di-
agnosis inter-
face or wiring
harnessNoRemove ABS ECU connector, check
whether ECU binding post 2 in ABS
wiring harness is connected with pin
7 in diagnostic interfaceNoYesCheck diagnosis interface or wire harnessReplace ABS ECUMK-60 ABS system -ABS System Check5-113No diagnostic code output (cannot communicate with fault diagnosis
instrument) 6
[Description] When it cannot communicate with fault diagnosis instrument,
ABS ECU power supply circuit or diagnosis wire circuit might
be disconnectedPossible cause

Safety wire is burnt out

Diagnosis wire is broken
or joint gets loose

ABS ECU is damaged

Fault diagnosis instru-
ment has problem