Hyundai Ioniq: Clutch System / Concentric Slave Cylinder Assembly. Repair procedures

Hyundai Ioniq (AE) 2017-2025 Service Manual / Engine Clutch System / Clutch System / Concentric Slave Cylinder Assembly. Repair procedures

Removal

1.	Remove the hybrid motor assembly. (Refer to Hybrid Motor System - "Hybrid Motor Assembly")

2.	Remove the engine clutch actuator. (Engine Clutch System - "Engine Clutch Actuator")

3.	Remove the adapter (A).

Remove the concentric slave cylinder (A) after loosening the bolts.

Tightening torque :

21.6 - 26.5 N.m (2.2 - 2.7 kgf.m, 15.9 - 19.5 lb-ft)

Installation

Install in the reverse order of removal.

•	After tightening bolts temporarily, tighten the bolt completely at the same time with regulation torque.

•	When it is assembled, it must be free from invasive foreign matters and oil leakage.

•	Before installing the adapter, check the assembled state of the O-rings (A).

After replacing the Engine clutch actuator, operate the followings in order using GDS equipment.

(1)	Engine clutch inspection line learning and diagnostic information.

(2)

Removal of air from engine clutch hydraulic pressure line.

•	When using a vacuum-pressure equipment to inject hydraulic fluid, the vacuum pressure should be no more than 2.5 torr and the injection pressure should be between 2.3 - 2.5 bars.

•	If it is impossible to inject hydraulic fluid using the above condition, be sure to remove air from the hydraulic line of the engine clutch at a temperature between 0 - 40°C.

(3)	Engine clutch/motor resolver adaptation.

(4)	Stabilization of the engine clutch hardware transfer torque.

Concentric Slave Cylinder Assembly. Components and components location

C..

Clutch Cover And Disc. Components and components location

C..

Other information:

Hyundai Ioniq (AE) 2017-2025 Service Manual: Troubleshooting

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Hyundai Ioniq (AE) 2017-2025 Service Manual: 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...