ESC HECU Connector Input/Output

Fig 1: ESC HECU Connector Input/Output Terminals

Courtesy of HYUNDAI MOTOR CO.HYUNDAI MOTOR CO.

ESC TERMINAL REFERENCE CHART

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	SCAN TOOL 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	Courtesy of HYUNDAI MOTOR CO.	IG ON
14	CAN Low	Courtesy of HYUNDAI MOTOR CO.	IG ON
30	BRAKE LIGHT SWITCH	voltage (High) : 0.8 * IG ON more voltage (Low) : 0.3 * IG ON lower	BRAKE ON/OFF