Pinpoint Tests O: Water In Fuel (WIF) Sensor: Introduction

NOTE: Regeneration may occur during normal operation. During regeneration, diagnostic procedures may display biased values. If a regeneration occurs during diagnostic procedures, allow the process to complete before continuing diagnostics.

This pinpoint test is intended to diagnose the following:

fuel system contamination
harness circuits: GND, SIGRTN, WIF and VPWR
WIF sensor (9T321)

Fig 1: Water In Fuel (WIF) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
F-150	A	1 2 3 4	SIGRTN WIF GND VPWR
F-Series Super Duty	B	2 1 3	SIGRTN WIF GND
Transit	C	2 1	SIGRTN WIF
All other vehicles	D	1 2	SIGRTN WIF

Fig 2: Powertrain Control Module-B (PCM-B) Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit	A	35 31	SIGRTN WIF
All other vehicles	B	44 24	SIGRTN WIF