J91 - Check FPM Circuit

- Key "OFF".

- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box, leave PCM disconnected.

- Key "ON", engine "OFF".

- Connect a test lamp between test pin 8 and test pin 37 at the breakout box.

- Observe test lamp for an indication of a fault while performing the following: (The light will go out when a fault is found indicating an open)

- Shake, wiggle, bend the fuel pump monitor circuit between the fuel pump relay (or splice if applicable, refer to schematic) and the PCM.

- Is fault indicated?

Yes -- Isolate fault and service as necessary. Remove breakout box. Reconnect PCM. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Go to 92. J92 - Check For Shorts to Power