Measures For Faults In Inspection And Abs Operation Experiment (Wet Inside Of Brake System) - Lifan 620 Maintenance Manual

www.CarGeek.ir
⑤
(7) Rework of operation of item (exhaust) should be carried out for all wheels.
(8) Measure the play of brake pedal; if not in compliance with specification, repeat the
⑥ ⑤
processes in item (exhaust mode) and item (exhaust). If the brake pedal play still
does not comply with specification after over 10 repeats of exhaust mode and exhaust
operation, replace with spare HECU (wet) and then restart the operation.
(9) Connect the reassembled equipment and diagnostic instrument to HECU to recheck
whether there is still a DTC. If yes, delete the DTC, and then disconnect the
reassembled equipment or diagnostic instrument.
(10) When using other reassembled equipments (that can produce vacuum or is filled
with liquid), the methods are as follows.
1) Operate in process as described in item (1) - (4) above;
2) The inside of brake system will form vacuum after the vacuum pump works for about
60s.
⑥
3) Exhaust mode in item above should be conducted 10 seconds before vacuum
separation.
4) Do not repeat stepping on and releasing the pedal.
5) Fill brake fluid for over 20 seconds during vacuum separation (7bar/100Psi above).
6) End brake fluid filling and exhaust mode.
7) Operate in process described in item ⑧ - ⑨.
6. Measures for faults in inspection and ABS operation experiment (wet inside of brake
system).
(1) Connect reassembled equipment or diagnostic instrument. The following conditions
should be met:
1) Special wire should be applied when connecting to pin 25 connecting piece of ECU.
2) When connecting to wire K (pin 7), the circuit of vehicle should be connected or the
vehicle should be started.
3) Oil can of the master pump should be connected to uninterruptible brake oil supply
equipment, or there should be always brake oil in oil can.
(2) Diagnose HECU with reassembled equipment and diagnostic instrument to check if
there is still a DTC.
1) DTC should be deleted first if it exists.
2) If DTC can not be deleted, refer to "DTC Check Table" in Section 24 (If there is fault in
HU, motor and ECU, exhaust and filling in HECU can not be operated).
(3) After stepping on brake pedal, open the bleed screw on the caliper or drum brake to
exhaust the air inside.
This operation should be carried out for all wheels before that the brake fluid exhausted
through the bleed screw contains no air and brake pedal is hard enough.
(4) Operate the exhaust mode with the reassembled equipment or diagnostic instrument
and step on brake pedal, if there is no reaction force, repeat stepping on and releasing
the pedal until exhaust mode is finished.
(5) Rework of operation of item (3) (exhaust) should be carried out for all wheels.
(6) Measure the play of brake pedal; if not in compliance with specification, repeat the
processes in item (4) (exhaust mode) and item (3) (exhaust). If the brake pedal play still
does not comply with specification after over 10 repeats of exhaust mode and exhaust
operation, replace with spare HECU (wet) and then restart the operation.
(7) Connect the reassembled equipment and diagnostic instrument to HECU to recheck
whether there is still a DTC. If there is still a DTC, disconnect the reassembled
equipment or diagnostic instrument.
186
www.cargeek.ir