ESC HECU Connector Input/Output

Fig 1: Identifying ESC HECU Connector Terminals

Courtesy of HYUNDAI MOTOR CO.HYUNDAI MOTOR CO.

ESC HECU CONNECTOR INPUT/OUTPUT

Connector Terminal		Specifications	Conditions
No	Description	Specifications	Conditions
1	Ground (Pump)	Current range: Min-10 A Max-20 ~ 39 A	Always
4	Ground (Valve, ECU)	Current range: Min-2.5 A Max-5 ~ 15 A	Always
2	Supply voltage (Pump)	Battery voltage	Always
3	Supply voltage (Valve)	Battery voltage	Always
26	Wheel sensor voltage (FL)	Battery voltage	IG ON
9	Wheel sensor voltage (FR)
6	Wheel sensor voltage (RL)
8	Wheel sensor voltage (RR)
5	Wheel sensor signal (FL)	Voltage (High): 0.89-1.26 V Voltage (Low): 0.44-0.63 V	RUNNING
10	Wheel sensor signal (FR)
27	Wheel sensor signal (RL)
29	Wheel sensor signal (RR)
11	Diagnosis Input/output	Voltage (High): 0.8 * IG ON more Voltage (Low): 0.2 * IG ON lower	HI-SCAN Communication
28	Ignition	Battery voltage	KEY ON/OFF
31	ESC Passive switch	Voltage (High): 0.6 * IG ON more Voltage (Low): 0.4 * IG ON lower	Switch ON/OFF
36	Hand brake switch	Voltage (High): 0.7 * IG ON more Voltage (Low): 0.3 * IG ON lower	Switch ON/OFF
37	Yaw Rate Sensor Test	Voltage (High): 4.1 V more Voltage (Low): 1 V lower	IG ON
18	Yaw Rate Sensor Reference	2.464 V - 2.536 V	IG ON
16	Yaw Rate Sensor Signal	Offset voltage: 2.5 V range: 0.35 V ~ 4.65 V (-100 ~ 100°/s)	IG ON
20	Acceleration Sensor Signal	Offset voltage: 2.5 V range: 0.35 V ~ 4.65 V (-1.8 g ~ 1.8 g)	IG ON
15	Yaw Rate Sensor Ground	GND LEVEL	Always
35	CAN High	Not communication: 2.5± 0.5 V communication: Courtesy of HYUNDAI MOTOR CO.	IG ON
14	CAN Low		IG ON
30	BRAKE LIGHT SWITCH	Voltage (High): 0.8 * IG ON more Voltage (Low): 0.3 * IG ON lower	BRAKE ON/OFF