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 ...

Brake Line Components and components location
Components ...

Other information:

Kia Niro (DE HEV) Owners Manual: Parking on hills
Generally, if you have a trailer attached to your vehicle, you should not park your vehicle on a hill. People can be seriously or fatally injured, and both your vehicle and the trailer can be damaged if unexpectedly roll down hill. WARNING - Parking on a hill Parking your vehicle on a hill wit ...

Kia Niro 2017 (DE HEV) Service Manual: Components and components location
Component Location Index [Engine Room] 1. Ambient Temperature Sensor 2. Receiver-drier 3. Condenser 4. Compressor 5. Discharge hose 6. The service port (voltage) 7. The service port (high pressure) 8. A/C Pressure Transducer (APT) ...

© 2016-2019 www.kniro.net