– 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.
– 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.
– OvervoltageWhen 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.
– UndervoltageIn 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.
1.ABS Warning LampThe 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.
2.EBD/Parking brake Warning LampThe 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.
1.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
2.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
3.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
4.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
Hyundai Accent (HC) (2017 - 2022) Service Manual: MDPS Assembly
- Removal 1.Disconnect the battery negative cable and wait for at least three minutes before beginning work. 2.Put a flat tool (Ø4mm) into a guide hole located in the bottom of steering wheel and press a spring. • When put a tool into a hole, make sure not to damage an airbag cusion by a tool. 3.Turn a steering wheel anti-clockwise, so make a guide hole (A) shown on the rightside.Hyundai Accent (HC) (2017 - 2022) Service Manual: Specifications
- Specifications Ignition System Ignition Coil ItemSpecification Rated Voltage (V)13.5 Operation Voltage (V)6 - 16 ItemSpecification Engine Speed (RPM)100020003000400050006000 Dwell Time (ms)3.43.43.42.92.72.5 Secondary Coil Voltage (kV)40 ↑40 ↑40 ↑40 ↑40 ↑38 ↑ Spark plug ItemSpecification TypeSILZKR7E9 Gap0.8 - 0.9 mm (0.