2008 GEELY CK ECU

276Section 2 ABS System CheckI. DTC Problem Inspection TableNote: If the Battery is excessively discharged, the motor will not be driven, therefore you must
check that the battery voltage is normal before performing the motor driving test. The vehicle
must be stationary during the test. 1 DTC 01276 Like ly Causes
[De s cription]
When the vehicle speed exceeds
20km/h, A BS EC U de te c ts tha t the motor c a n not
ope ra te normally and re c ord this D TC.
[Hint]
Whe n this proble m oc c urs, one of the
possible causes is that the wire harness between
the motor and the ECU is disconnected. Use the
sc a n me te r to pe rform the te st by a c tiva ting the
H CU func tion to drive the motor.z P ow e r supply is disc onnec ted or grounde dz Motor w ire ha rne ss is disc onnec te dz Motor is da ma ge dRemove the motor wire harness connector, connect
it to the Battery to see whether the motor operates?Check the fuse and ABS ECU connectorConnect the motor wire harness connectorTurn the
ignition switch to ONClear the DTC Use the scan
meter to Perform the HCU diagnosistor
Turn the ignition switch to ONDoes the fault reoccur?Refer to “Occasional Problem Service Key Point” Normal
Normal
NoAbn.
Abn.
Ye sReplace the HCU
Replace the fuse or wire harness
Replace the ECU

277Whether the sensor is installed
correctlyCheck the sensor Output Volt-
age at the ABS ECU25 pin
connector Check each sensorCheck each sensor ringgearCheck the wheel bearing
clearance Check the wire harness be-
tween the sensor and the
ABS ECUNo
Install it correctly
Replace the ABS ECUAbn.
Abn.
Abn.
Abn. Ye s
Normal Normal
Normal
NormalReplace
Replace
Replace or Repair 2 DTC 00283,00285,00283,00285,
00287,00290Like ly Caus e s
[De s cription]
When no open in the circuit can
be detected and there is no signal output when
the vehicle speed exceeds 20km/h, this DTC is
set.
[H int]
The likely c ause ma y be the se nsor
ina dvertently not insta lle d, short c ircuit in the
sensor coil or wire harness, excessive
clearance between the sensor and the ring gear
or dama ged ring ge a r.z
T h e s e n s o r is n o t in s t a lle d in a d v e r t e n t ly
z
Short c irc uit in the se nsor c oil or w ire ha rne ss
z
Excessive big clearance between the sensor and
the ring gea r
z
The ring gea r is not insta lle d ina dverte ntly
z
ABS ECU failure

278Whether the sensor is installedcorrectlyCheck the sensor Output Volt-
age at the ABS ECU25 pin
connector Check each sensorCheck each sensor ringgearCheck the wheel bearing
clearance Check the wire harness be-
tween the sensor and the
ABS ECUNo
Install it correctly
Replace the ABS ECUAbn.
Abn.
Abn.
Abn. Ye s
Normal Normal
Normal
NormalReplace
Replace
Replace or Repair 3 DTC 00283, 00285, 00287, 00290 Likely Cause s
[De s cription]
When the vehicle speed exceeds
20km/h, if the se nsor signa l goe s be yond the
tolerance range, this DTC is set.
[Hint]
The we ak signa l ma y re sult from the
poor c onne c tion or short c irc uit of the se nsor
c oil or wire ha rness, da ma ge d ring gea r or
excessively big clearance between the sensor
a nd the ring gea r.z The inte rmitte nt poor connec tion or short circ uit of
the se nsor c oil or wire ha rne ss
z Excessively big or small clearance between the
se nsor a nd the ring gea r
z Da ma ge d ring gea r
z Exc e ssive ly big be a ring c lea ra nc e
z ABS ECU failure

279 4 DTC 00283, 00285,00287, 00290 Like ly Cause s
[De s cription]
When there is recognized open
or short circuit in the sensor, this DTC is set.
[Hint]
The likely c ause ma y be the poor
c onne ction of the sensor, short circ uit in the coil
or wire ha rne ss, or fault in the se nsor signa l
proce ssing c irc uit in the ABS ECUz Ope n c irc uit in the se nsor c onne ctor or coil
z Short circuit in the sensor coil
z The se nsor c onne ctor or wire harne ss is short to
ground or powe r supply
z Fault in the sensor signal processing circuit in the
ABS ECURepair the connectorCheck the sensor on each wheelRemove the ABS ECU connector, check
whether the resistances among the following
terminals is within the specification?
Standard:
1.0~1.3K
LF: 1-2K
RF: 19-20K
LR: 5-6K
RR: 22-23K Check the corresponding sensor connectorDoes the fault reoccur?Check the wire harness between the ECU and
the sensor Refer to "Occasional Prob-
lem Service Key Points"Replace the ABS ECU
Abn.
Abn. Normal
Normal
Normal
Ye s Normal Ω,
Ω,
Ω,
Ω,
Ω,

280 5 DTC 01044 Likely Cause s
[De s cription]
Whe n the ECU programming is
not consistent with the ABS wire harness pin
connection, this DTC is setz ABS wire harne ss pin c onne c tion e rror
z ABS ECU programming e rrorRepair the wire harnessUse the scan meter to check whether the ABS ECU
programming is correct
Correct: 01901 Check the ABS wire harness pin connector for continuity
Pin connector: ABS ECU pin 12 and 14Reprogram
Abn. Ye s No

281 6 DTC 00668 Like ly Cause s[De s cription]When powe r supply termina l 30
doe s not supply the volta ge or the volta ge is too
high, this DTC is se t.z ABS system fuse is broken
z Ba tte ry Volta ge too low or high
z ABS wire ha rne ss connec tor is da mage d
z ABS ECU is damagedCheck the ABS system 50A fuseDisconnect the ABS wire harness from the
ECU, turn the ignition switch to ON, mea-
sure the voltage among the following termi-
nals of the ABS wire harness
Terminal 8 and 9 9.5-16.5V
Terminal 24 and 25 9.5 - 16.5V
Terminal 8 and 4 9.5 -16.5V Check the ABS wire harness connectorRetest. Abn. again?Check the Battery voltage Refer to "Occasional Problem
Service Key Points"Replace the ABS ECU
Abn.Abn.
Ok
Ok
Ok
Ye s NoReplace the fuse
Repair the connector Abn.

282 7 DTC 01130 Like ly Cause s[De s cription]When ABS is affected by high
fre quenc y ele c troma gnetic wave or the mic ro-
processor determines that the input vehicle
speed is suspect, this DTC is setz High frequency electromagnetic wave interference
z Da ma ge d se nsor or its wire ha rness
z Damaged ABS ECUReplace the ABS ECUCheck the sensor output voltage Check the wire harness between
the ECU and the sensorReplace the sensor Abn.
Ok NoCheck the sensor Ok

283II. Non-DTC Problem Inspection Table1 With ignition s witch ON (Engine Off),
the AB S warning lig ht do e s no t g o o nLike ly Caus e s[De s cription] ABS Wa rning Light doe s not go
on, the like ly c a use ma y be the ope n in the
warning light powe r supply c irc uit, burne d bulb
or dama ged wa rning light drive module .z Burned fuse
z A B S W a r ning L ight B ulb bur ne d
z Power supply circuit open
z ABS Wa rning Light Drive Module da mage dCheck the ABS warning light
fuse in the fuse blockRemove the ECU connector,
does the warning light goes on
with the ignition switch ON? Check whether the ABS
warning light is burnedCheck whether the warn-
ing light power supply cir-
cuit and ground circuit in the
wire harness is openCheck the connector of the
warning light power supply
circuit and ground circuit in
the wire harness Does the fault reoccur?Abn.
Replace
Repair the wire harnessNo
Ye s
Abn.
Abn. Ok
Ye s No
Ok
OkReplace
Repair the wire
harness
Repair the connectorCheck whether the wire in the
ABS wire harness connecting
the ABS warning light drive
module and the ECU is short
to ground Ye s Replace the warning light
drive module Ye sNoRefer to "Occa-
sional Problem
Service Key Points"