Mitsubishi 4m51 Ecu Pinout Work !!install!!
Mitsubishi 4M51 ECU Pinout: A Comprehensive Guide
- Measure resistance from A2 and B19 to chassis ground. Must be < 5 Ohms.
- Voltage at A1 (permanent) and B18 (key-on) must be >11V.
- Check B1 (Main Relay). When key-on, B1 should ground. If not, internal ECU driver failed.
- B1: Injector #1 driver
- B2: Injector #2 driver
- B3: Injector #3 driver
- B4: Injector #4 driver
- B5: Common injector ground / return
- B6: Fuel pump relay control
- B7: EGR valve control / feedback
- B8: Turbocharger wastegate solenoid control
- B9: Exhaust gas temperature sensor (EGT) input
- B10: Crankshaft position sensor (CKP) low
- B11: Crankshaft position sensor (CKP) high
- B12: Camshaft position sensor (CMP) signal
- B13: Knock sensor input
- B14: Diagnostic data line (e.g., CAN low or K-line)
- B15: Diagnostic data line (e.g., CAN high or K-line)
Step 2 – Sensor Check (Water Temp)