Pinpoint Test AH: Cooling Fan: Introduction

WARNING: DO NOT OPERATE THE ENGINE WITH THE HOOD OPEN UNTIL THE FAN BLADE HAS BEEN EXAMINED FOR POSSIBLE CRACKS AND SEPARATION. A DAMAGED FAN CAN SEPARATE DURING OPERATION. FAILURE TO FOLLOW THIS INSTRUCTION MAY RESULT IN SERIOUS PERSONAL INJURY.

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:

cooling fan clutch (8A616)
fan speed sensor (FSS) (8A616)
harness circuits
PCM (12A650)

Fig 1: Identifying Cooling Fan Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
4	FSS (Fan Speed Sensor)
5	PWRGND (Power Ground)
2	VBPWR (Vehicle Buffered Power)
6	FCV (Fan Control Variable)
1	VPWR (Vehicle Power)

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

Courtesy of FORD MOTOR CO.

Pin	Circuit
12	FSS (Fan Speed Sensor)
70, 71, 72, 73, 74	PWRGND (Power Ground)
1	VBPWR (Vehicle Buffered Power)
34	FCV (Fan Control Variable)