Isuzu 4hl1 Ecu Pinout Online

of turning off the ignition; doing so can cause the ECM to malfunction. Troubleshooting and Resources

| Pin No. | Wire Color | Function | Notes | |---------|------------|----------|-------| | A10 | Green/Black | Rail Pressure Sensor (Signal) | 0.5V (0 bar) to 4.5V (1800 bar) | | A11 | Black/Yellow | Rail Pressure Sensor (Ground) | Shared with sensor ground | | A12 | Red/Blue | Rail Pressure Sensor (+5V) | From A32 reference | | B16 | White/Black | Suction Control Valve (SCV) (+) | PWM output to lift pump on HP3 pump | | B17 | Black/Red | Suction Control Valve (SCV) (-) | - | | B18 | Yellow/Green | Rail Pressure Regulator (PCV) (+) | Normal: 10–30% duty cycle | | B19 | Yellow/Black | Rail Pressure Regulator (PCV) (-) | - | isuzu 4hl1 ecu pinout

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