Geely CK (2008). Manual part — 69
Geely CK (2008). Manual part - 69
273
IV. DTC Display Method
V. HCU Diagnosis
Use the scan meter to diagnose the Hydraulic Control Unit (HCU), select the "3 HCU diagnosis" in the
options and perform the following procedures.
*
Perform the above step 2 - 8 test for each wheel in the following order LF
RF
LR
RR.
*
If the result of some one of the above steps is different from the normal result, it indicates that the
corresponding element fails the normal operation, please check the corresponding element.
*
You can use “ESC” button to end the test to return the function menu in any place in the screen where
there is “return” displayed to return to the function menu.
Code Displayed
Never happened before
No DTC
Happened before
Occasional DTC
Never happened before
Non-occasional DTC
Happened before
Occasional DTC and Non-
occasional DTC
System Problem
There is no problem current ABS
Warning Light does not light up)
The problem still exists(ABS
Warning Light goes on)
Step
Action
Screen Display
Normal Result
1
HCU diagnosis – hydraulic pump test
Pump motor operates
2
LF Wheel——Depress the brake pedal
3
LF Wheel—— normally open valve
open, normally closed valve closed,
wheel locked?
Wheel locked
4
LF Wheel—— normally open valve
closed, normally closed valve closed,
wheel locked?
Wheel locked
5
LF Wheel — — normally open valve
closed, normally closed valve open,
wheel can rotate freely
Wheel can rotate freely, the
pedal rebound, the cylinder
motor operating noise is audible
6
LF Wheel—— normally open valve
closed, normally closed valve closed,
wheel can rotate freely
Wheel can rotate freely
7
LF Wheel — — normally open valve
open, normally closed valve closed,
wheel locked?
Wheel locked, the pedal sag
slightly
8
Release the brake
pedal
Depress and hold
the brake pedal
→
→
→
274
VI. Troubleshooting Quick Index
VII. Non-DTC Problem Inspection Table Index
DTC
Fault Description
Diagnosis Result
Inspection
Table No.
Reference
Page
65535
ECU
Damaged
1276
ABS hydraulic pump
Motor can not operate
1
275
283
LF Wheel Sensor
276
285
RF Wheel Sensor
277
290
LR Wheel Sensor
278
287
RR Wheel Sensor
1044
ABS programming error
5
279
668
Power supply terminal 30
6
280
1130
Abnormal ABS operation Signal is not as specified
7
281
Electrical or mechanical
fault
2,3,4
Inspection
Table No.
Reference
Page
1
282
2
283
The brake force on both sides is not uniform
The brake force is insufficient
ABS operates when the brake pedal is slightly
depressed(vehicle is stationary)
ABS operates when the brake pedal is slightly
depressed(vehicle is driving)
When the ABS operates, the brake pedal vibrates
severely
4
285
5
286
6
287
No DTC output(failure in communicating with the scan meter)
Fault Status
Turn the ignition switch to “ON” (With engine off), ABS Warning
Light does not go on
After the engine is started, the warning light does not go off
ABS
abnormal
284
3
Brake pedal stroke is excessively long
You need to heavily depress the brake pedal
275
VIII. ABS ECU Connector Pin Layout
ABS ECU Connector (End Views)
Electrical Wiring Diagram
Combination Meter
ABS Warning Light
Drive Module
ABS ECU
ABS RR Wheel Sensor
ABS LR Wheel Sensor
ABS RF Wheel Sensor
ABS LF Wheel Sensor
Brake Lamp Switch
276
Section 2 ABS System Check
I. DTC Problem Inspection Table
Note: 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 Caus e s
[De s cription]
When the vehicle speed exceeds
20km/h, ABS ECU detects that the motor can not
operate normally and record this DTC.
[Hint]
When this problem occurs, one of the
possible causes is that the wire harness between
the motor and the ECU is disconnected. Use the
scan meter to perform the test by activating the
HCU function to drive the motor.
Power supply is disconnected or grounded
Motor wire harness is disconnected
Motor is damaged
Remove the motor wire harness connector, connect
it to the Battery to see whether the motor operates?
Check the fuse and ABS ECU connector
Connect 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 ON
Does the fault reoccur?
Refer to “Occasional Problem Service Key Point”
Normal
Normal
No
Abn.
Abn.
Yes
Replace the HCU
Replace the fuse or wire harness
Replace the ECU
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