Pinpoint Tests L: Engine Oil Temperature (EOT) Sensor: Introduction

WARNING: BE AWARE OF MOVING VEHICLE COMPONENTS AND HEAT. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN 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:

EOT sensor (12A648)
harness circuits: EOT and SIGRTN
PCM (12A650)

Fig 1: Engine Oil Temperature (EOT) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit	A	3 2	SIGRTN EOT
All other vehicles	B	2 1	SIGRTN EOT

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

Courtesy of FORD MOTOR CO.

Pin	Circuit
44	SIGRTN (Signal Return)

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

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Transit	A	21 19	SIGRTN EOT
All other vehicles	B	36	EOT