EPS System Description

EPS Control Unit Inputs and Outputs for Connector A (2P)

 

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

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 
WHT Vcc
(Voltage common) 
Power source for torque sensor 1-Ground Ignition switch ON (II) About 9 V 
Ignition switch OFF 0 V 
YEL V-ref
(Reference voltage) 
Reference voltage for torque sensor 2-Ground Ignition switch ON (II) 3.3 V 
PNK/BLU RY+
(Relay trigger plus) 
Drives the motor relay
(motor relay is turned OFF when problem occurs) 
3-Ground Start the engine Battery voltage 
Ignition switch OFF 0 V 
BLU/YEL VSP
(Vehicle speed pulse) 
Detects the vehicle speed signal for the speed sensor or the ECM/PCM (4 pulse/Rev) 4-Ground Raise the vehicle off the ground and spin the front wheel Alternating voltage about 0 V-5 V-0 V-5 V 
BLU NEP
(Engine pulse) 
Detect the engine pulse 5-Ground Start the engine About 0 V-Battery Voltage 
YEL IG1
(Ignition 1) 
Power source for activating the system 6-Ground Ignition switch ON (II) Battery voltage 
Ignition switch OFF 0 V 
GRY/BLU SG
(Sealed ground) 
Ground for the sealed line 7-Ground ——— ——— 
BRN SE
(Sensor earth) 
Ground for the torque sensor 8-Ground ——— ——— 
RED Sub
(Sub voltage) 
Defects torque sensor signal 9-Ground Start the engine and turn the steering wheel About
0.5 V«4.5 V 
10 BLU Main
(Main voltage) 
Detects torque sensor signal 10-Ground 
11 BRN SCS
(Service check signal) 
Detects service check connector signal ——— ——— ——— 
13 YEL/RED WLP
(Warning lamp) 
Drives the EPS indicator light 13-Ground EPS indicator ON Battery voltage 
OFF 0 V 
14 GRY DIAG-H
(Diagnosis-H) 
Communicate with Honda PGM-Tester ——— ——— ———