Pcm Code P020 - Open Fuel Pump Circuit (3 Of 3): Notes
NOTE:
Test numbers refer to numbers on diagnostic chart.
- 10)
With ignition on, DVOM should read greater than 10 volts for 2 seconds as relay powers up fuel pump. - 11)
If a short circuit is present, short may be in circuit No. 120, in fuel pump or in PCM. Normal circuit resistance is 3-4 ohms. - 12)
If DVOM reads a steady voltage of greater than 10 volts, non-switched portion of fuel pump circuit is shorted. - 13)
This checks for PCM shorting circuit No. 120 to ground. - 14)
This checks for short circuit in fuel tank. - 15)
This checks fuel pump for short circuits. Check harness connector. - 16)
This checks circuit No. 120 for a short to ground. - 17)
Check for grounded fuel pump test point, connection at relay center and oil pressure switch. Also check harness for short to ground.