Hyundai Ioniq: Smart Key System / Smart Key Unit. Components and components location

Hyundai Ioniq (AE) 2017-2025 Service Manual / Body Electrical System / Smart Key System / Smart Key Unit. Components and components location

Components (1)

No	Connector A	Connector B	Connector C
1	Battery (+)_LOAD	IGN2 Relay output	Immobilizer antenna power input
2	Battery (+)_CPU	IGN1 Relay output	Wheel speed signal input
3	Antenna ground (Internal1)	-	SSB Switch1 signal input
4	-	-	-
5	Antenna ground (Internal2)	B-CAN (Low)	ESCL Unlock switch signal input
6	Antenna ground (Assist)	EMS CAN	P Position switch signal input
7	Antenna ground (Trunk)	B-CAN (High)	Brake switch signal input
8	Antenna ground (Driver)	B-CAN (Low)	Ignition 2 signal input
9	-	P-CAN (Low)	Ignition 1 signal input
10	SSB Illumination power (Output)	P-CAN (High)	Starter relay output
11	External buzzer output	-	Immoblizer antenna ground
12	ESCL Power output	ACC Relay output	RPM Signal input
13	-	-	SSB Switch2 signal input
14	Antenna power (Internal1)	Signal ground	Driver toggle button switch signal input
15	-	-	Assiste toggle button switch signal input
16	Antenna power (Internal2)	SSB ACC LED Output	Starter relay feedback signal input
17	Antenna power (Assist)	SSB IGN LED Output	Stop lamp fuse signal input
18	Antenna power (Trunk)	-	ACC Signal input
19	Antenna power (Driver)	-	-
20	-	SSB Illumination ground	Power ground
21	ESCL Enable output	-
22	ESCL Ground output	Wireless charging module output

Smart Key. Repair procedures

Smart KeySmart Key Code Saving1.Connect the DLC cable of GDS to the data link connector (16 pins) in driver side crash pad lower panel, turn the power on GDS...

Smart Key Unit. Schematic diagrams

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Hyundai Ioniq (AE) 2017-2025 Service Manual: Sunroof Motor. Repair procedures

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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...