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

This pinpoint test is intended to diagnose the following:

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

Fig 1: Identifying ESM Assembly (1 Of 2)

Courtesy of FORD MOTOR CO.

Fig 2: Identifying ESM Assembly (2 Of 2)

Courtesy of FORD MOTOR CO.

Fig 3: EGR System Module (ESM) Connector

Courtesy of FORD MOTOR CO.