Hyundai Ioniq: Hybrid Control System / HCU (Hybrid Control Unit). Repair procedures

Hyundai Ioniq (AE) 2017-2024 Service Manual / Hybrid Control System / Hybrid Control System / HCU (Hybrid Control Unit). Repair procedures

Removal

•	Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

Refer to "HPCU".

•	The HCU is integrated into the HPCU that can’t be disassembled. So refer to "HPCU" for the removal or installation procedure of the HCU.

Installation

•	Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

Refer to "HPCU".

•	The HCU is integrated into the HPCU that can’t be disassembled. So refer to "HPCU" for the removal or installation procedure of the HCU.

2.	Perform the clutch pressure sensor calibration. (Refer to "Clutch Pressure Sensor")

HCU (Hybrid Control Unit). Schematic diagrams

HCU Terminal and Input / Output SignalTerminal FunctionConnector [C133-S] Pin No Description Connected to 1HCU GroundChassis ground2HCU GroundChassis ground3HCU GroundChassis ground4Battery power (B+)Battery5Battery power (B+)Battery6Battery power (B+)Battery7-　8-　9-　10-　11-　12-　13-　14-　15Brake Switch 2 signal inputBrake Switch (NC, IG1)16Brake Switch 1 signal inputBrake Switch (NO, B+)17-　18-　19-　20-　21-　22-　23-　24-　25-　26-　27-　28-　29-　30-　31-32-33-34-　35-　36-　37-　38Start signal inputSmart Key Unit39-　40-　41-　42-　43-　44-　45-　46-　47-　48-　49-　50-　51-　52-　53-　54-　55-　56-　57-　58-　59-　60-　61-　62-　63-　64-　65-　66-　67-　68-　69-　70-　71-　72-　73IGN signal inputSmart Key Unit74-　75-　76-　77-　78Powertrain CAN [High] signal inputOther control modules79Powertrain CAN [Low] signal inputOther control modules80-　81Hybrid CAN [High] signal inputOther control modules82Hybrid CAN [Low] signal inputOther control modules83-　84-　85-　86-　87-　88-　89-　90-　91-　92-　93-　94-　Input/Output signalConnector [C133-S] Pin no Description Condition Type Level 1HCU GroundAlwaysDC VoltageMax...

Brake Switch. Description and operation

DescriptionThe Brake Switch is installed on the brake pedal and linked with the HCU and stop lamp. It sensors the status of the brake pedal (Release, Push) and transmits the signal to the HCU...

Other information:

Hyundai Ioniq (AE) 2017-2024 Service Manual: Electric Parking Brake (EPB). Repair procedures

Removal1.Turn ignition switch off and disconnect the battery (-) cable from the battery.2.Disconnect the EPB control module connector.3.Loosen the mounting nuts and then remove the EPB control module. Tightening torque : 9.8 - 14.7 N...

Hyundai Ioniq (AE) 2017-2024 Owner's Manual: Driver AttentionThe driver must be cautious in the below situations may not work properly when recognition of the lane marker is poor or limited :

When lane and road condition is poor It is difficult to distinguish the lane marker from road when the lane marker is covered with dust or sand. It is difficult to distinguish the color of the lane marker from road. There is something looks like a lane marker...