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.
Physical Values
| Terminal No. (Wire Color) |
Description | Condition | Value (Approx.) |
||
|---|---|---|---|---|---|
| + | - | Signal Name | Input/Output | ||
| 2 (R) |
9 (B) |
Fuel pump activation request signal | Input | Ignition Switch: ON | 12 V |
| Engine is running | 0 V | ||||
| 3 (L) |
- | Drivetrain CAN-H | Input/Output | - | - |
| 4 (V) |
- | Drivetrain CAN-L | Input/Output | - | - |
| 5 (SB) |
9 (B) |
Ignition power supply | Input | Ignition Switch: ON | Battery voltage |
| 6 (Y) |
- | Sensor ground (Fuel pressure sensor) |
- | - | - |
| 7 (R) |
9 (B) |
Fuel pressure sensor signal | Input | Ignition Switch: ON | 1.5 V |
| Engine is running | 1.9 V | ||||
| 8 (LG) |
6 (Y) |
Sensor power supply (Fuel pressure sensor) |
Output | Ignition Switch: ON | 5 V |
| 9 (B) |
- | Ground | - | - | - |
| 10 (L) |
9 (B) |
Ignition power supply (MAIN RELAY) | Input | Always | Battery voltage |
| 11 (G) |
- | Fuel pump ground | - | - | - |
| 12 (O) |
9 (B) |
Fuel pump control signal (PWM) |
Output | Ignition Switch: ON | 0 V |
| Engine is running (at idle) | 7 V |
||||
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
* : Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to HOW TO HANDLE BATTERY .
Use the Manual With the Right Hardware
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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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