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: ESM EGR Assembly (1 Of 2)

Courtesy of FORD MOTOR CO.

Fig 2: ESM EGR Assembly (2 Of 2)

Courtesy of FORD MOTOR CO.

Fig 3: EGR System Module (ESM) Connector

Courtesy of FORD MOTOR CO.