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② Check the HECU with repetition device or checking device and determine if it has trouble
code.
† If with trouble code, firstly conduct the operation to delete the trouble code.
† If the trouble code can’t be deleted, implement with reference to section 2.4 “trouble
checklist of trouble code” (If the HU, motor or ECU has trouble, the inside of HECU
can’t conduct the air discharge and oil refill).
③ After the brake pedal is depressed, open the air discharge screw attached on the wheel brake
caliper or drum brake to discharge the internal air. It's required to conduct this operation on all
wheels, till that the brake oil discharged from the air discharge screw is free of air and the brake
pedal is properly rigid.
④ Conduct the air discharge mode by means of the repetition device or the checking device. If
there has no reaction force when the brake pedal is depressed, then repeat the operation of pedal
depressing and pedal releasing, till the air discharge mode is completed
⑤ The operation in item (air discharge) should be repeated for all wheels. ③
⑥ Measure the brake pedal travel. If not meet with the provisions, repeat the operations in item
④ (air discharge mode) and item ③ (air discharge). If the brake pedal travel doesn't meet with the
provisions after the air discharge mode and air discharge are repeated for above 10 times, replace
with after-service HECU (wet type) and then repeat the operations from the beginning.
⑦ Connect the repetition device and checking device to the HECU and again determine the
existence of trouble code. If with trouble code, delete the trouble code and then disconnect the
repetition device or checking device.
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