Pinpoint Test HH: Exhaust Gas Recirculation System Module (ESM): Introduction: Notes
NOTE:
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).