Fuel Pump Duty Cycle Output From PCM (Focus 2.0L GDI)
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| FP Duty Cycle Command | PCM Status | Fuel Pump Control Module Actions |
|---|---|---|
| 0-4% | Valid OFF duty cycle. | The fuel pump control module sends a 60% duty cycle signal on the FPM circuit. The fuel pump is OFF. |
| 4-18% | Invalid OFF duty cycle. | The fuel pump control module sends a 20% duty cycle signal on the FPM circuit. The fuel pump is OFF. |
| 18-80% | Normal operation. | The fuel pump control module operates the fuel pump at the speed requested. FP duty cycle times 1.43 minus 14.29 equals pump speed % of full ON. For example, FP duty cycle equals 42%. 42 times 1.43 minus 14.29 equals 46 (rounded). Pump is run at 46% of full ON. The fuel pump control module sends a 60% duty cycle signal on the FPM circuit. |
| 80-86% | Normal operation. | The fuel pump control module operates the fuel pump at full ON. The fuel pump control module sends a 60% duty cycle signal on the FPM circuit. |
| 86-95% | Invalid OFF duty cycle. | The fuel pump control module sends a 20% duty cycle signal on the FPM circuit. The fuel pump is OFF. |
| 95-100% | Valid OFF duty cycle. | The fuel pump control module sends a 60% duty cycle signal on the FPM circuit. The fuel pump is OFF. |