Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Terminals And Reference Values For EPS Control Unit
Data are reference value and are measured.
| Terminal | Wire color | Item | Condition | Data (Approx.) | |
|---|---|---|---|---|---|
| 1 | W | Power supply (Memory back-up) | Ignition switch: ON | Battery voltage | |
| Ignition switch: OFF | Battery voltage | ||||
| 2 | B | Ground | Always | 0 V | |
| 3 | BR | Power supply | Ignition switch: ON | Battery voltage | |
| Ignition switch: OFF | 0 V | ||||
| 5 | L | CAN-H | - | - | |
| 7 | P | CAN-L | - | - | |
| 11 | B | Torque sensor ground | Always | 0 V | |
| 12 | Y | Torque sensor sub | Engine running | Steering wheel: Not steering (There is no steering force) | 2.5 V |
| Steering wheel: Steering | 1.7 V - 3.3 V (The value is changed according to steering left or right) |
||||
| 13 | R | Torque sensor power supply | Ignition switch: ON | 8 V | |
| Ignition switch: OFF | 0 V | ||||
| 14 | W | Torque sensor main | Engine running | Steering wheel: Not steering (There in no steering force) | 2.5 V |
| Steering wheel: Steering | 1.7 V - 3.3 V (The value is changed according to steering left or right) |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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