Hyundai Ioniq (AE): AHB(Active Hydraulic Boost) System / Schematic diagrams

Terminal Function
IBAU Connector Input / Output

No
Description
No
Description
1
E/R Fuse & Relay Box
(Multi Fuse - AHB)
24
Electric Parking Brake Switch
(Auto Hold Swutch)
2
PSU Motor (+)
25
-
3
-
26
Parking Brake Switch
4
Shield Cable Ground
27
Rear Wheel Sensor LH (SIG)
5
E/R Fuse & Relay Box
PSU Motor (GND)
28
Front Wheel Sensor LH (SIG)
6
Brake Pedal Module (PDT PWR) 
29
Driver Door Switch
7
Brake Pedal Module (PDF PWR)
30
E/R Fuse & Relay Box
(Multi Fuse - AHB 2)
8
E/R Fuse & Relay Box
(Stop Signal Electronic Module)
31
Brake Pedal Module (PDF GND)
9
-
32
-
10
Brake Pedal Module (PDT GND)
33
Rear Wheel Sensor LH (VCC)
11
Shield Cable Ground
34
Rear Wheel Sensor RH (VCC)
12
-
35
-
13
PSU Motor (-)
36
Brake light switch
14
Ground 
37
-
15
-
38
C-CAN (High)
16
Crash Pad Switch (ESC OFF Switch)
39
C-CAN (Low)
17
Front Wheel Sensor LH (VCC)
40
Vehicle Speed :
Smart Key Control Module, PCM
18
Front Wheel Sensor RH (VCC)
41
-
19
P-CAN (High)
42
Front Wheel Sensor RH (SIG)
20
P-CAN (Low)
43
Rear Wheel Sensor RH (SIG)
21
ESS Drive
44
Stop Lamp Switch
22
Brake Pedal Module (PDT SIG)
45

23
Brake Pedal Module (PDF SIG)
46
Ground (GE06)

    Components1. Intergrated Brake Actuation Unit 2. Pressure Source Unit

    AHB Brake System Bleeding ProcedureAir Bleeding Tool Installation Procedure    â€¢ To prevent the brake fluid reservoir tank from beingdamaged and ensure the safety of worker, set thepressure of the gauge to the standard value beforeinstalling the SST.

    Other information:

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: General safety information and caution

    Safety PrecautionPrecautions To Take Before Servicing High Voltage System    â€¢ Since hybrid vehicles contain a high voltage battery, if the high voltage system or vehicles are handled incorrectly, this might lead to a serious accidents like electric shock and electric leakage.

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Troubleshooting

    Trouble Symptom ChartsTrouble Symptom 1Trouble Symptom 2 Trouble symptom Probable cause Remedy The set vehicle speed varies greatly upward or downward"Surging" (repeated alternating acceleration and deceleration) occurs after settingMalfunction of the vehicle speed se

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