293

8. Remove the whole HECU from the bracket.

ABS HECU Assembly

ABS HECU Brake Pipe Removal Schematic

294

III.  HCU Replacement

1. Depress the retaining clip on the union joint side

and remove the cylinder motor wire harness.

2. Remove the 4 screws as shown in the figure, the

removed old screw can not be reused.

3. Separate the HCU from the ECU.

4. Install the new HCU to the ECU.

5. Use new screw to attach the ECU to the HCU,

tighten the torque: 3+1Nm.

6. Connect the motor wire harness, be careful that

the retaining clip shall be in place.

IV. ECU Replacement

1. Depress the retaining clip on the union joint side and remove the

wire harness.

2. Remove the 4 screws as shown in the figure and discard them

3. Remove the HCU from the ECU.

4. Install the new ECU to the HCU.

5. Use the new screw to attach the ECU to the HCU, tighten the

torque3+1Nm.

6. Connect the motor wire harness, be careful that the retaining clip

shall be in place.

295

V. ABS Assembly Reinstallation

Note: the plug of the ABS assembly hydraulic outlet can only be removed after the brake pipe is

installed, lest the foreign object will enter the brake system.

1. Install the ABS assembly to the bracket, tighten the torque: 20+4Nm.

2. Remove the plug of the hydraulic outlet, installed the brake pipe. Make sure that the brake pipe is

correctly installed.

3.  Install the brake pipe connected to the master cylinder.

4. The brake pipe torque is 12+4Nm (M10 x 1) and 15+3Nm (M12 x 1).

5. Fill the new brake fluid into the reservoir until the liquid level reach the MAX and bleed it as specified.

6. With the ignition switch ON, ABS Warning Light must goes on for 1.7 seconds then goes off.

7. Clear the DTC memory, check if there is DTC again.

8. Drive the vehicle to confirm the ABS function (you must feel that the pedal rebound).

VI. ECU Program

Note: when replacing the HECU or ECU, you shall program the new ECU, otherwise the ABS

Warning Light flashes and the system can not operate normally.

Use the scan meter to program the ECU based on the following procedure:

Connect the scan meter with the diagnostic interface

Select function 07, Press OK button to confirm

Enter code 01901 and Press OK button to confirm

Select function 07, Press OK button to confirm, quit the diagnostic

End

 

 

 

 

296

VII. Fill the liquid and bleed

After replacing the HECU, bleed the second HECU circuit in addition to the filling and bleeding of the regular

brake system. Use the scan meter to perform the following procedure:

Fill the fluid and bleed based on the regular brake system

until there is no air bubble in the transparent hose

Connect the scan meter with the diagnostic interface

Select function 04, Press OK button to confirm

Depress the brake pedal and keep the hydraulic cylinder push

rod rebound

Release the brake pedal, loosen the left and right brake caliper

bleeder screw, press " " button

Depress the brake pedal 10 times, tighten the left and right

brake caliper bleeder screw, press " " button

Repeat the above I II III steps 7 times and  press " " button

The screen display the end of the bleed, press

"

" button to return to "function selection" menu

Select function 06, Press OK button to confirm, quit the

diagnostic mode

End

 

 

 

 

 

 

 

 

 

→

↑

↑

↑