SFC 612-FPP Low Voltage Key On -Engine Off System Data Mode
Does DST display FPP voltage of 0.2 volts or less with the Foot Pedal in idle position?
Yes
* Key Off * Disconnect FPP sensor from harness * Jumper 5 volt reference circuit and FPP signal circuit together * Key On
No Yes
Does DST display FPP voltage of 4.8 volts or greater?
Slowly depress FP while observing FPP voltage.
* Poor sensor connection or * Faulty sensor
No
Does DST FPP voltage ever drop below 0.2 volts?
No
Probe FPP signal circuit with test light connected to battery voltage.
Yes
Intermittent Problem
* Faulty FPP or * Faulty Connection or * Poor 5 volt power supply circuit
Does DST display FPP voltage of 4.8 volts or greater?
Yes
* 5 volt reference is open or shorted to ground or * Faulty ECM connection or * Faulty ECM
No * FPP signal circuit open or shorted to ground or * Faulty ECM connection or * Faulty ECM
Indmar Products
2008 343
All Rights Reserved Draft Rev. A-Jan. 2008
