FFS1 Check PCM Input Signal

- Key OFF.

- Install Rotunda Breakout Box 007-00033, or equivalent with Rotunda Breakout Box Adapter 007-00053 (leave the PCM disconnected).

- Key ON.

- Measure the voltage between FFS BOB Pin 31 and ground.

- Is the voltage between 4-5 volts?

YES -- FFS circuit is OK.
If sent here from QT11, RETURN to Diagnostic Routines. Diagnostic Routines Index

NO -- GO to FFS2. FFS2 Check FFS Wire For Open