Pinpoint Test HH: Exhaust Gas RECIRCULATION System Module (ESM): Introduction

This pinpoint test is intended to diagnose the following:

• ESM (9Y456)
• orifice tube assembly (9D477)
• differential pressure feedback exhaust gas recirculation (EGR) sensor pressure hoses
• vacuum lines
• harness circuits: DPFE, SIGRTN, EVR, VPWR and VREF
• powertrain control module (PCM) (12A650)

Fig 1: EGR System Module (ESM) Connector

Courtesy of FORD MOTOR CO.

For PCM connector views or reference values, refer to REFERENCE VALUES .