Pinpoint Tests C: Crankcase Ventilation 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:

harness circuits: CRNKCSVT, GND, SIGRTN, VBPWR and VPWR
crankcase ventilation sensor
crankcase ventilation heater

PCM (12A650)

Fig 1: Identifying Crankcase Ventilation Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit	A	2 3 1	CRNKCSVT GND VPWR
F-650/F-750, F-Series Super Duty	A	2 3 1	CRNKCSVT SIGRTN VBPWR

Fig 2: Identifying Crankcase Ventilation Heater Assembly Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	VPWR (Vehicle Power)
1	GND (Ground)

Fig 3: Identifying Powertrain Control Module-E (PCM-E) Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
F-650/F-750	A	4	SIGRTN
Transit	B	27	CRNKCSVT
All other vehicles	A	75 4 14	CRNKCSVT SIGRTN VBPWR