Pinpoint Tests Y: Powertrain Control Module (PCM) Read Only Memory (ROM) Failure: Introduction
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:
- incorrect PCM calibration
- PCM (12A650)