Kia Niro: AHB(Active Hydraulic Boost) System / Pressure Source Unit Repair procedures

Removal
1.

Turn ignition switch OFF and disconnect the negative (-) battery terminal.

2.

Remove the air cleaner assembly.

(Refer to Engine Mechanical System - "Air Cleaner")

3.

Remove the brake fluid from the reservoir .

4.

Remove the connector and wire ring bracket.

5.

Loosen the pressure source unit (PSU) flare nut (A) and then remove the tube.

Tightening torque:

12.7 - 16.7 N·m (1.3 - 1.7 kgf·m, 9.4 - 12.3 lb·ft)

6.

Disconnect the pressure source unit (PSU) connector (A) and hose (B).

  

The following section describes how to diagnose faults using a diagnostic instrument.

1)

Connect the diagnostic instrument to the self-diagnostic connector (16-pin) beneath the crash pad on the side of driver's seat, and then turn on the ignition to activate the diagnostic instrument.

2)

In the GDS Vehicle Type Selection menu, select "Vehicle Type" and "Brake/VDC/AHB" System.

3)

Disconnect the negative (-) battery terminal.

7.

Remove the sub frame.

(Refer to Suspension System - "Sub Frame")

8.

Loosen the nuts and bolt and then remove the pressure source (PSU).

Tightening torque:

19.6 - 29.4 N·m (2.0 - 3.0 kgf·m, 14.5 - 21.7 lb·ft)

Installation
1.

Installation is the reverse of removal.

2.

Check the brake pedal operation.

3.

After filling the brake fluid in the reservoir, perform the air bleed.

(Refer to the Brake system - "Brake Bleeding Procedure")

4.

Conduct the pedal traval sensor (PTS) calibration.

(Refer to the Brake System - "Brake Pedal")

5.

Conduct the pressure sensor calibration.

Diagnostic Procedure Using a Diagnostic Instrument

The following section describes how to diagnose faults using a diagnostic instrument.

1.

Connect the diagnostic instrument to the self-diagnostic connector (16-pin) beneath the crash pad on the side of driver's seat, and then turn on the ignition to activate the diagnostic instrument.

2.

In the GDS Vehicle Type Selection menu, select "Vehicle Type" and "Brake/VDC/AHB" System, and then opt for "OK."

Pressure Sensor Calibration

3.

Turn ignition switch off and on after calibration procedure.

4.

Confirm success of calibration.

Pedal Travel Sensor (PTS) Calibration

Pressure Source Unit Components and components location
Components 1. Pressure Source Unit (PSU) 2. Motor 3. Filler adapter 4. Accumulator 5. Bracket ...

Maintenance
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Other information:

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Maintenance operation I : Inspect and if necessary, adjust, correct, clean or replace. R : Replace or change. SEVERE DRIVING CONDITIONS A : Repeatedly driving short distance of less than 8 km (5miles) in normal temperature or less than 16 km (10 miles) in freezing temperature. B : Extensi ...

Kia Niro (DE HEV) Owners Manual: To decrease the crusie control set speed
Follow either of these procedures: Move the lever down (to SET-), and hold it. Your vehicle set speed will decrease by 10 km/h (5 mph). Release the lever at the speed you want. Move the lever down (to SET-), and release it immediately. The cruising speed will decrease by 1.0 km/h (1.0 ...

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