Hyundai i-30: ABS (Anti-Lock Brake System) / Description and operation

Hyundai i30 (PD) 2018-2024 Service Manual / Brake System / ABS (Anti-Lock Brake System) / Description and operation

Description

This specification applies to HCU (Hydraulic Control Unit) and ECU (Electronic Control Unit) of the HECU. (Hydraulic and Electronic Control Unit)

This specification is for the wiring design and installation of ABS ECU.

This unit has the functions as follows.

–	Input of signal from the wheel speed sensors attached to each wheel.

–	Control of braking force.

–	Failsafe function.

–	Self diagnosis function.

–	Interface with the external diagnosis tester.

Installation Position : Engine Compartment

–	Brake tube length from Master cylinder port to HECU inlet port should be max. 1m

–	The position should not be close to the engine block and not lower than the wheel.

Operation

The ECU shall be put into operation by switching on the operating voltage (IGN).

On completion of the initialization phase, the ECU shall be ready for operation.

In the operating condition, the ECU shall be ready, within the specified limits (voltage and temperature), to process the signals offered by the various sensors and switches in accordance with the control algorithm defined by the software and to control the hydraulic and electrical actuators.

Wheel Sensor Signal Processing

The ECU shall receive wheel speed signal from the four active wheel sensors.

The wheel signals are converted to voltage signal by the signal conditioning circuit after receiving current signal from active wheel sensors and given as input to the MCU.

Solenoid Valve Control

When one side of the valve coil is connected to the positive voltage that is provided through the valve relay and the other side is connected to the ground by the semiconductor circuit, the solenoid valve goes into operation.

The electrical function of the coils are always monitored by the valve test pulse under normal operation conditions.

Voltage Limits

–	Overvoltage When overvoltage is detected(above 16.8 V), the ECU switches off the valve relay and shuts down the system. When voltage is returned to operating range, the system goes back to the normal condition after the initialization phase.

–	Undervoltage In the event of undervoltage(below 9.3 V), ABS control shall be inhibited and the warning lamp shall be turned on. When voltage is returned to operating range, the warning lamp is switched off and ECU returns to normal operating mode.

Pump Motor Checking

The ECU performs a pump motor test at a speed of 30km/h once after IGN is switched on.

Diagnostic Interface

Failures detected by the ECU are encoded on the ECU, stored in a EEPROM and read out by diagnostic equipment when the ignition switch is turned on.

The diagnosis interface can also be used for testing the ECU during production of the ECU and for actuating the HCU (Air-bleeding line or Roll and Brake Test line).

Warning Lamp Module

[Super vision]

[General]

ABS Warning Lamp

The active ABS warning lamp indicates the selftest and failure status of the ABS. The ABS warning lamp shall be on :

–	During the initialization phase after IGN ON. (continuously 3 seconds).

–	In the event of inhibition of ABS functions by failure.

–	During diagnostic mode.

–	When the ECU Connector is separated from ECU.

EBD/Parking brake Warning Lamp

The active EBD warning lamp indicates the selftest and failure status of the EBD. However, in case the Parking Brake Switch is turned on, the EBD warning lamp is always turned on regardless of EBD functions.The EBD warning lamp shall be on:

–	During the initialization phase after IGN ON. (continuously 3 seconds).

–	When the Parking Brake Switch is ON or brake fluid level is low.

–	When the EBD function is out of order.

–	During diagnostic mode.

–	When the ECU Connector is separated from ECU.

ABS Control

Normal Braking without ABS

	Inlet Valve (IV)	Outlet Valve (OV)	Return Pump
Operation	Open	Close	OFF

•	IV : Inlet Valve

•	OV : Outlet Valve

•	RL : Rear left wheel

•	FR : Front right wheel

•	FL : Front left wheel

•	RR : Rear right wheel

•	RP : Return pump

Decrease Mode

	Inlet Valve (IV)	Outlet Valve (OV)	Return Pump
Operation	Close	Open	ON (Motor speed control)

•	IV : Inlet Valve

•	OV : Outlet Valve

•	RL : Rear left wheel

•	FR : Front right wheel

•	FL : Front left wheel

•	RR : Rear right wheel

•	RP : Return pump

Hold Mode

	Inlet Valve (IV)	Outlet Valve (OV)	Return Pump
Operation	Close	Close	ON (Motor speed control)

•	IV : Inlet Valve

•	OV : Outlet Valve

•	RL : Rear left wheel

•	FR : Front right wheel

•	FL : Front left wheel

•	RR : Rear right wheel

•	RP : Return pump

Increase Mode

	Inlet Valve (IV)	Outlet Valve (OV)	Return Pump
Operation	Open	Close	ON (Motor speed control)

•	IV : Inlet Valve

•	OV : Outlet Valve

•	RL : Rear left wheel

•	FR : Front right wheel

•	FL : Front left wheel

•	RR : Rear right wheel

•	RP : Return pump

Components and components location

Components [LHD] 1. ABS Control Module (HECU) 2. Front Wheel Speed Sensor 3. Rear Wheel Speed Sensor 4...

Schematic diagrams

Schematic Diagrams [Without EPB] [With EPB] Termianal Function [Without EPB] Pin No Description Current Max Min 13 Ground for recirculation pump 39 A 10 A 1 Voltage supply for pump motor 39 A 10 A 25 Voltage supply for solenoid valves 15 A 2 A 38 Ground for solenoid valves and ECU 15 A 2 A 22 FL Wheel speed sensor signal 16...

Other information:

Hyundai i30 (PD) 2018-2024 Service Manual: Engine Control Module (ECM)

Schematic diagrams ECM Terminal and Input / Output signal ECM Harness Connector ECM Terminal Function Connector [A] Terminal Description 1 Fuel Pressure Regulator Valve (FPRV) [High] Control 2 Integrated Thermal Management Module (ITM) Motor (+) 3 Integrated Thermal Management Module (ITM) Motor (-) 4 Exhaust Gas Temperature Sensor (EGTS) #2 (T4) Ground [GPF Type] 5 Engine Coolant Temperature Sensor (ECTS) #1 Ground 6 - 7 Engine Coolant Temperature Sensor (ECTS) #2 Ground 8 Differential Pressure Valve (DPV) Ground 9 Rail Pressure Sensor (RPS) Ground 10 Exhaust Gas Temperature Sensor (EGTS) Ground 11 Manifold Absolute Pressure Sensor (MAPS) Ground 12 Electric Waste Gate Control Actuator (EWGA) Ground 13 EGR Pressure Sensor Ground 14 Oil Pressure & Temperature Sensors (OPTS) Ground 15 Electric Exhaust Gas Recirculation (EEGR) Control Valve Ground 16 - 17 A/C Pressure Transducer (APT) Ground 18 Sensor Power (+5V) (Camshaft Position Sensor (CMPS) [Bank 1 / Intake, Exhaust]) 19 Sensor Power (+5V) (Manifold Absolute Pressure Sensor (MAPS)) Sensor Power (+5V) (Electric Exhaust Gas Recirculation (EEGR)) Sensor Power (+5V) (Crankshaft Position Sensor (CKPS)) 20 Sensor Power (+5V) (Oil Pressure & Temperature Sensors (OPTS)) Sensor Power (+5V) (Electric Throttle Control Module (ETC)) Sensor Power (+5V) (Rail Pressure Sensor (RPS)) 21 Throttle Position Sensor (TPS) Ground 22 Electric Exhaust Gas Recirculation (EEGR) Control Valve Motor (+) 23 Electric Exhaust Gas Recirculation (EEGR) Control Valve Motor (-) 24 Knock Sensor (KS ) Shield Ground 25 - 26 Ignition Coil (Cylider #3) Control 27 - 28 - 29 Exhaust Gas Temperature Sensor (EGTS) #1 (T3) Ground [GPF Type] 30 - 31 - 32 - 33 EGR Pressure Sensor Signal 34 - 35 Integrated Thermal Management Module (ITM) Motor Ground 36 - 37 Camshaft Position Sensor (CMPS) [Bank 1 / Intake] Signal 38 - 39 Electric Waste Gate Control Actuator (EWGA) Signal 40 Sensor Power (+5V) (EGR Pressure Sensor) Sensor Power (+5V) (Electric Waste Gate Control Actuator (EWGA)) 41 Sensor Power (+5V) (Accelerator Position Sensor (APS #1)) 42 Sensor Power (+5V) (Brake Booster Vacuum Pressure Sensor (BBVPS)) Sensor Power (+5V) (A/C Pressure Transducer (APT)) 43 Injector (Cylinder #3) [+] Control 44 Injector (Cylinder #2) [+] Control 45 - 46 - 47 CCP-CAN [High] 48 Ignition Coil (Cylinder #1) Control 49 - 50 Neutral Switch [With ISG] 51 - 52 - 53 - 54 Exhaust Gas Temperature Sensor (EGTS) #1 (T3) Signal [GPF Type] 55 - 56 Exhaust Gas Temperature Sensor (EGTS) #2 (T4) Signal [GPF Type] 57 - 58 Differential Pressure Sensor (DPS) Signal 59 Exhaust Gas Temperature Sensor (EGTS) Signal 60 Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] Ground 61 Mass Air Flow Sensor (MAFS) Signal 62 - 63 Engine Speed Signal Output 64 Injector (Cylinder #1) [+] Control 65 Injector (Cylinder #4) [+] Control 66 Injector (Cylinder #3) [-] Control 67 Injector (Cylinder #4) [-] Control 68 Ignition Coil (Cylider #2) Control 69 CCP-CAN [Low] 70 Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] Signal 71 Crankshaft Position Sensor (CKPS) Ground 72 Ignition Lock Switch [M/T & Without Smart Key] 73 Oil Pressure Sensor (OPS) Signal 74 Intake Air Temperature Sensor (IATS) Signal 75 Engine Coolant Temperature Sensor (ECTS) #1 Signal 76 Engine Coolant Temperature Sensor (ECTS) #2 Signal 77 Electric Exhaust Gas Recirculation (EEGR) Control Valve Signal 78 Differential Pressure Valve (DPV) Signal 79 Throttle Position Sensor (TPS) #2 Signal 80 Rail Pressure Sensor (RPS) Signal 81 - 82 Integrated Thermal Management Module (ITM) Motor Signal 83 Mass Air Flow Sensor (MAFS) Ground 84 A/C Pressure Transducer (APT) Signal 85 - 86 Injector (Cylinder #2) [-] Control 87 Injector (Cylinder #1) [-] Control 88 Fuel Pressure Regulator Valve (FPRV) [Low] Control 89 Differential Pressure Sensor (DPS) Ground 90 Ignition Coil (Cylinder #4) Control 91 Crankshaft Position Sensor (CKPS) Signal 92 - 93 Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2] Ground 94 - 95 Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2] Signal 96 - 97 Oil Temperature Sensor (OTS) Signal 98 Throttle Position Sensor (TPS) #1 Signal 99 - 100 - 101 Manifold Absolute Pressure Sensor (MAPS) Signal 102 Camshaft Position Sensor (CMPS) [Bank 1/Intake] Ground 103 - 104 Knock Sensor (KS) Signal 105 Knock Sensor (KS) Ground Connector [B] Terminal Description 1 Chassis Ground 2 Chassis Ground 3 Battery Power (B+) (Battery) 4 Chassis Ground 5 Battery Power (B+) (Main Relay) 6 Battery Power (B+) (Main Relay) 7 - 8 - 9 Sensor Power (+5V) (Integrated Thermal Management Module (ITM) Motor) Sensor Power (+5V) (Mass Air Flow Sensor (MAFS)) 10 Sensor Power (+5V) (Accelerator Position Sensor (APS) #2) 11 Boost Pressure Sensor (BPS) Signal Input 12 Accelerator Position Sensor (APS) #2 Ground 13 Accelerator Position Sensor (APS) #1 Ground 14 Brake Booster Vacuum Pressure Sensor (BBVPS) Ground [With ISG] 15 - 16 Boost Pressure Sensor (BPS) Ground 17 Fuel Level Sender (FLS) Signal 18 Accelerator Position Sensor (APS #2) Signal 19 - 20 - 21 - 22 RCV Control Solenoid Valve Control 23 Cooling Fan Relay [PWM] Control 24 Electric Waste Gate Control Actuator (EWGA) DC Motor (+) Control 25 Electric Waste Gate Control Actuator (EWGA) DC Motor (-) Control 26 Ignition Switch Signal Input 27 Sensor Power (+5V) (Differential Pressure Sensor (DPS)) Sensor Power (+5V) (Differential Pressure Valve (DPV)) Sensor Power (+5V) (Boost Pressure Sensor (BPS)) 28 - 29 - 30 Brake Light Switch Signal Input 31 Brake Test Switch Signal Input 32 Accelerator Position Sensor (APS #1) Signal 33 - 34 ISG OFF Switch Signal Input [With ISG] 35 Start Signal Input 36 - 37 Fuel Pump Relay Control [W/O Smart Key] 38 DC/DC Converter (LDC) Control [With ISG] 39 - 40 Variable Oil Pump Valve Control 41 ETC Motor [+] Control 42 ETC Motor [-] Control 43 - 44 LIN communication signal input 45 C-CAN (Low) 46 - 47 - 48 Clutch Switch [M/T] 49 Wiper Switch Signal Input 50 Blower Motor MAX Input 51 Start Relay Control (Low Side) 52 - 53 - 54 Rear Defrost Switch Signal Input 55 - 56 - 57 - 58 Differential Pressure Valve (DPV) DC Motor (+) Control 59 Differential Pressure Valve (DPV) DC Motor (-) Control 60 Battery Power (B+) (Battery) 61 LIN Communication Signal input 62 C-CAN (High) 63 Brake Booster Vacuum Pressure Sensor (BBVPS) Signal [With ISG] 64 Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1] VS+ (NERNST Cell Voltage) 65 Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1] Rc (Compensative Resistance) 66 Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1] Rc/Rp (Pump Cell Voltage) 67 Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1] VS-/IP- (Common Ground for VS, IP) 68 - 69 A/C Compressor Relay Control 70 - 71 Start Relay Control (High side) 72 - 73 - 74 Engine Control Relay Control 75 Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1] Heater Control 76 Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2] Heater Control 77 Vehicle Speed Signal Input 78 CCP-CAN [High] 79 CCP-CAN [Low] 80 - 81 - 82 - 83 Purge Control Solenoid Valve (PCSV) Control 84 Fuel Pump Relay Control [With Smart Key] 85 ISG OFF Switch (IND...

Hyundai i30 (PD) 2018-2024 Service Manual: Variable Force Solenoid (VFS)

Description and operation Description Continuous Variable Valve Timing (CVVT) system advances or retards the valve timing of the intake and exhaust valve in accordance with the ECM control signal which is calculated by the engine speed and load...