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# Kia Soul EV: AHB(Active Hydraulic Boost) System / Rear Disc Brake Repair procedures

Kia Soul EV (PS EV) 2015-2020 Service Manual / Brake System / AHB(Active Hydraulic Boost) System / Rear Disc Brake Repair procedures

Removal

1. | Remove the rear wheel & tire.
Tightening torque : 88.3 ~ 107.9 N.m (9.0 ~ 11.0 kgf.m, 65.1 ~ 79.6 lb-ft)

2. | Release parking brake (EPB).

3. | Disconnect the electric parking brake actuator connector (A).

4. | Remove the hose eyebolt (B). Loosen the caliper mounting bolts (C) and remove the rear caliper body (A).
The hose eyebolt (A) tightening torque : 24.5 ~ 29.4 N.m (2.5 ~ 3.0 kgf.m, 18.1 ~ 21.7 lb-ft)
The caliper mounting bolts (B) tightening torque : 63.7 ~ 73.5 N.m (6.5 ~ 7.5 kgf.m, 47.0 ~ 54.2 lb-ft)

5. | Remove the rear brake disc by loosening the screws (A).

Replacement

Rear brake pads

1. | Remove the rear wheel & tire.

2. | Connect the GDS to the data link connector located underneath the dash panel.

3. | Ignition "ON" & Engine "OFF".

4. | Release the electric parking brake.

5. | Select vehicle name and EPB system.

6. | Select the “PAD change mode”.

7. | Perform the " PAD change mode (Before pad change)" procedure with GDS.
When disengaging while the motor is in operation, be sure to press down on the brake pedal.

8. | Ignition "OFF".

9. | Disconnect the electric parking brake actuator connector (A).

10. | Loosen the guide rod bolts (B) and then remove caliper body (A).

11. | Replace pad retainers (C) and brake pads (B) in the caliper carrier (A).

12. | Insert the piston in the cylinder using SST (09580-0U000).

13. | Place the caliper body (A) on the caliper carrier and tighten the guide rod bolts (B).
Tightening torque: 21.6 ~ 31.4 N.m (2.2 ~ 3.2 kgf.m, 15.9 ~ 23.1 lb-ft)

14. | Connect the electric parking brake actuator connector (A).

15. | Ignition "ON".

16. | Select the “PAD change mode”.

17. | Perform the " PAD change mode (Before pad change)"procedure with GDS.
Check that the parking brake operates normally.

18. | IGN switch “OFF” and remove the GDS.

19. | Install the rear wheel & tire.
Tightening torque: 88.3 ~ 107.9 N.m (9.0 ~ 11.0 kgf.m, 65.1 ~ 79.6 lb-ft)

Inspection

Rear brake disc thickness check

1. | Check the brake pads for wear and fade.

2. | Check the brake disc for damage and cracks.

3. | Remove all rust and contamination from the surface, and measure the disc thickness at 8 points, at least, at the same distance (5mm) from the brake disc outer circle.
Brake disc thickness Standard: 10 mm (0.393 in) Service limit: 8.4 mm (0.331 in) Deviation: Less than 0.005mm (0.0002in)

4. | If the level of wear exceeds the limit, replace the discs and pad assembly on the left and right of the vehicle.

Rear Brake Pad Check

1. | Check for the pad wear and if the measured pad thickness is below the specified value, replace the pad assembly.
Pad thickness standard value : 10 mm (0.394 in) service limit : 2.0 mm (0.0787 in)

2. | Check that grease is applied to sliding contact points and inspect the pad and backing metal for damage.

Rear brake disc runout check

1. | Place a dial gauge at approximately 5mm (0.2 in.) from the outer circumference of the brake disc, and measure the runout of the disc.
Brake disc runout limit: 0.05 mm (0.0020 in.) or less (new one)

2. | If the runout of the brake disc exceeds the limit specification, replace the disc, and then measure the runout again.

3. | If the runout does not exceed the limit specification, install the brake disc after turning it 180° and then check the runout of the brake disc again.

4. | If the runout cannot be corrected by changing the position of the brake disc, replace the brake disc.

Installation

1. | Install in the reverse order of removal.

2. | Insert the piston in the cylinder using SST (09580-0U000).

3. | After installation, bleed the brake system. (Refer to Brake system bleeding)

##### Rear Disc Brake Components and Components Location

Components 1. Guide rod bolt2. Bleed screw3. Caliper carrier4. Caliper body5. Brake pad6. Pad retainer ...

##### Parking Brake System

...

##### Other information:

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