EPS System Description (HATC Model)

EPS System Description

EPS Control Unit Inputs and Outputs for Connector A (4P)

 

Terminal number	Wire color	Terminal sign (Terminal name)	Description	Measurement
				Terminals	Conditions Ignition switch ON (II)	Voltage
1	RED	M+ (Motor plus)	Drives the actuator motor	1-GND	———	———
2	WHT/ BLU	+B (Plus battery)	Power source for the actuator motor	2-GND	Every time	Battery voltage
3	GRN	M- (Motor minus)	Drives the actuator motor	3-GND	———	———
4	BLK	PG (Power ground)	Ground for the actuator motor	4-GND	———	———

EPS Control Unit Inputs and Outputs for Connector B (14P)

 

Terminal number	Wire color	Terminal sign (Terminal name)	Description	Measurement
				Terminals	Conditions (Ignition switch ON (II))		Voltage
1	BRN	Vcc1 (12 V) (Voltage common 1)	Power source for torque sensor (12 V)	1-GND	Start the engine		Battery voltage
					Ignition switch OFF		0 V
2	RED	Vcc2 (5 V) (Voltage common 2)	Reference voltage for torque sensor (5 V)	2-GND	Start the engine		About 5 V
					Ignition switch OFF		0 V
3	BRN	SCS (Service check signal)	Detects service check connector signal	———	———		———
4	BLU/YEL	VSP (Vehicle speed pulse)	Detects the vehicle speed signal for the speed sensor or the ECM/PCM (4 pulse/Rev)	4-GND	Raise the vehicle off the ground and spin the front wheel		Alternating voltage about 0 V-5 V-0 V-5 V
5	GRY	DIAG-H (Diagnosis-H)	Communicate with HDS	———	———		———
6	YEL	IG1 (Ignition 1)	Power source for activating the system	6-GND	Ignition switch ON (II)		Battery voltage
					Ignition switch OFF		0 V
7	GRY/BLU	T/SIG (Torque sensor F/S signal)	Detects torque sensor signal	7-GND	Start the engine		Momently 5 V
8	YEL	VT6 (Voltage torque 6)	Detects torque sensor signal	8-GND	Start the engine and turn the steering wheel		About 0 V-5 V
9	WHT	T/SGND (Torque sensor ground)	Ground for the torque sensor	9-GND	———		———
10	BLU	VT3 (Voltage torque 3)	Detects torque sensor signal	10-GND	Start the engine and turn the steering wheel		About 0 V-5 V
11	PNK/BLU	RY+ (Relay trigger plus)	Drives the motor relay (motor relay is turned OFF when problem occurs)	11-GND	Start the engine		Battery voltage
					Ignition switch OFF		0 V
13	YEL/RED	WLP (Warning lamp)	Drives the EPS indicator light	13-GND	EPS indicator	ON	Battery voltage
						OFF	0 V
14	BLU	NEP (Engine pulse)	Detect the engine pulse	14-GND	Start the engine		About 0 V-Battery voltage