KN9 - Check FPRC Circuit For Short to Power and Ground

- Key "OFF".

- Fuel Pressure Regulator Control (FPRC) solenoid disconnected.

- Breakout box installed, Powertrain Control Module (PCM) disconnected.

- Measure resistance between test pin 13 (test pin 32 for CD4E and California manual transmission) and test pins 37 and 57 at the breakout box.

- Measure resistance between test pin 13 (test pin 32 for CD4E and California transmission) and test pins 40, 46 and 60 at the breakout box.

- Is each resistance greater than 10,000 ohms?

Yes -- Replace PCM. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Service short circuit. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)