Chery QQ - Check ABS

Chery QQ Service Manual Chassis System
9、Check ABS
（1） Check the out put voltage of speed sensor
1. Check if the clearance between speed sensor and teeth ring is satisfied with
specification.
2. Lift the wheel and release manual brake.
3. Remove ABS harness and measure the points of connector.
4. Run the wheel at speed of 1/2 RPM and measure the out put voltage.
MK20 I MK20 I/E
Front left wheel terminal 4 – 11 terminal 1 - 2
Front right wheel terminal 3 – 18 terminal 19 – 20
Rear left wheel terminal 2 – 10 terminal 5 - 6
Rear right wheel terminal 1 – 17 terminal 22 – 23
5. If the voltage is not with specification, the causes may be:
 The clearance between sensor and teeth ring is too big.
 Sensor malfunction.
 The resistance of sensor is 1.0—1.3 k.
 Distortion of teeth ring.
10、Removal and installation
(1)、 Spare parts offering
* HECU assembly dry type；
* HCU and ECU separate HCU wet type
(2)、Precaution on removing
 Repair the faults after find the
cause for malfunction with test
instrument
 Only open the package before
installation.
 Only use original parts.
 Only clean with soft cloth.
 Don’t use compressed air or move the
vehicle when ABS is working.
 Block the outlet for each pipe after
removing the parts.
 Please use DOT 4 brake fluid.
 Dip the seal and o-ring with brake liquid.
 Check the function of ABS and conventional brake system is normal after
repairing.
 Check if any leakage on each connector.
(3)、MK20-I HECU assembly Removal
 Turn off ignition switch and disconnect (-) wire on battery.
 Remove the harness from ABS assembly.
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Chery Automobile Co., Ltd