## 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