Excursion 4WD V8-6.0L DSL Turbo VIN P (2004)
If there is no FICM logic power to the FICM, the injectors will still buzz once the key is cycled but the engine will not start. There will be no other
symptoms related to the no start condition.
^ With the WDS, select DATALOGGER PID FICM LPWR. This PID will show how much voltage is being supplied to the FICM. If less then eight
volts, check for short/open or low battery.
^ If no voltage is being supplied, check logic fuse located in the relay center box. This box is mounted on the driver's side toward the cowl.
^ No voltage could also be caused by the FICM logic circuit through the C1282 (12PIN) connector.
FICM PID and Wiring Relationship
^ The FICM voltage PIDs are heavily filtered and therefore will respond slowly to a wiggle test for intermittent connection
^ The FICM voltage PIDs are displayed in half volt (05v) resolution
^ The FICM logic power circuit runs from the FICM (connector C1388C (X3), pin 8), goes through the C1282 (12 pin) connector, pin 6 and intersects
to the FICM Power Circuit Included in the FICM logic power circuit is a 10 amp fuse
^ The FICM's key power circuit runs from the FICM (connector C1388C(X3), pin7), goes through the C1282 (12 pin) connector, pin 9 and makes
connection with the ignition switch, where it receives its power
^ The FICM power circuit runs from the FICM (connector C1388C(X3), pins 4,23,24,25), goes through the C1282 (12 pin) connector, pin 12 and
connects at the FICM power relay
^ The FIVE FICM ground pins (1, 2, 3, 22, 26) are all tied together inside the FICM Hence, no independent affect on a PID
