Geely CK Series 2007 Workshop Manual page 292

3 Abnormal ABS operation
[Description]
It is in close connection with the
driver status and the road conditions and is
difficult to diagnose. However, if there is no
DTC memory, the following inspections can be
performed.
Is the sensor installed correctly
Ok
Check the sensor output volt-
age
Yes
Use scan meter for HCU di-
agnosis
Yes
Replace the ABS HCU
Replace the ABS HCU
Improperly installed sensor
Sensor wire harness faulty
Damaged sensor
Damaged ring gear
Foreign objects in the sensor
Damaged wheel bearing
Damaged ABS HCU
Damaged ABS ECU
No
Installed it correctly
Abn.
Check each sensor
Check each sensor ring gear
Check the wheel bearing clearance
Check the ABS ECU socket and
the middle connector
Does the fault reoccur?
Remove the ABS ECU connector,
check whether the resistances
among the following terminals are
within specification?
Standard: 1.0~1.3K ¸
Abn.
Shake the sensor wire harness and
connector while measuring them
LF: 1-2
RF: 19-20
LR: 5-6
RR: 22-23
Likely Causes
No
Ok
Ok
Yes
Yes
Abn.
Replace
Abn.
Replace
Abn.
Replace
or Repair
Abn.
Repair
the connector
Refer to
No
"Occasional
Problem
Service Key
Points"
Repair the
Ok
wire har-
ness or
connecto
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