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.
1.
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.
1.
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 Owner's Manual: Jump Starting


    In the event vehicle still does not have a functional 12V battery (check if interior lights will not turn on) then you can try a jump start to the engine compartment jumper terminals using a 12V booster pack or jumper cables from another vehicle's 12V battery according to the following instructions...

    Hyundai Ioniq (AE) 2017-2024 Service Manual: Specifications


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    1. Press either the L (driver's side) or R (passenger's side) button (1) to select the side view mirror you would like to adjust.

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