To get the full 154-pin PDF (free), visit the NavaraForum Resources section -> Filebase -> "YD25 EDC16 Pinout v3.2". For 2011-2015 models. The connector is smaller (96 total pins).
Introduction: Why the YD25 ECU Pinout Matters yd25 ecu pinout free
✅ Identify your ECU as EDC16 or EDC17. ✅ Download a pinout from a trusted forum (NavaraForum, ClubFrontier). ✅ Verify one known wire pin (e.g., ground or +12V) before trusting the whole diagram. ✅ Always backprobe – never cut or pierce your harness. To get the full 154-pin PDF (free), visit
The Nissan YD25 engine (2.5-liter direct-injection turbo diesel) is a workhorse found in the Nissan Navara (D40), Frontier, Pathfinder (R51), and various cab-chassis models worldwide. It’s renowned for its fuel efficiency and torque. However, when things go wrong—whether it’s a no-start condition, a throttle pedal fault, or a DIY wiring repair—the Engine Control Unit (ECU) pinout becomes your most critical document. Introduction: Why the YD25 ECU Pinout Matters ✅
If this guide saved you diagnostic time, share it with a fellow YD25 owner. The diesel community runs on shared knowledge, not locked PDFs. This article provides information for educational purposes. Always consult a professional vehicle electrician if you are unsure. Incorrect ECU wiring can cause airbag deployment or engine damage.
| Function | Pin | Wire Color | | --- | --- | --- | | Battery Power | C38 | White/Red | | Ignition Power | C77 | Black/Red | | Ground | C37 & C78 | Black | | CAN High | C13 | White | | CAN Low | C12 | Black | | Crank Sensor (+) | C25 | Blue | | Cam Sensor (+) | C28 | Green | | Rail Pressure Sensor | C18 (Signal) | Yellow | | SCV Fuel Valve | C44 & C45 | Brown/Red, Brown/Blue |
Note: View from the ECU harness side (pins facing you, clips on top). | Pin | Signal | Wire Color | Function | | --- | --- | --- | --- | | A23 | +12V Battery | White/Red (Large) | Main ECU Power | | A31 | +12V Ignition | Black/White | Switched 12V (Key ON) | | A2 | Ground | Black (Large) | ECU Main Ground | | A5 | Ground | Black | Sensor Ground | Throttle Pedal Position Sensor (TD04) | Pin | Signal | Description | | --- | --- | --- | | A63 | TPS1 Signal | 0.5V idle to 4.5V WOT | | A74 | TPS2 Signal | Redundant (inverse of TPS1) | | A73 | +5V Supply | Pedal reference voltage | Crankshaft & Camshaft Sensors | Pin | Signal | Note | | --- | --- | --- | | A19 | Crank (+) | Variable reluctance | | A20 | Crank (-) | Shield ground | | A58 | Cam (+) | Hall effect | | A59 | Cam (-) | | CAN Bus (Diagnostic & Immobilizer) | Pin | Signal | For | | --- | --- | --- | | A40 | CAN High | OBD2 port, ABS, BCM | | A39 | CAN Low | OBD2 port, ABS, BCM | | A10 | K-Line | Older diagnostics (KWP2000) | Fuel Pump (Suction Control Valve - SCV) | Pin | Signal | Pins A33 & A34 | PWM control to SCV (YD25 common rail) |