Powertrain Controls - ECM/PCM

Powertrain Control Module (PCM) calibrations are stored in the Electronically Erasable Programmable Read Only Memory (EEPROM). The EEPROM is not removable from the PCM. DTC 51 will set if no calibration was programmed in the PCM, or when the PCM detects an internal program fault (CHECKSUM ERROR). If DTC 51 sets during normal vehicle operation replace the PCM. The replacement PCM must be programmed using TECH 1 scan tool, or CAMS (T100) unit.

NOTE: Use the following procedure to reprogram the PCM.

CAUTION: The software/calibration used for PCM reprogramming must match the vehicle application or improper operation and/or vehicle damage may occur.
1. Connect tech-1 scan tool or CAMS (T100) unit, making sure:
^ Battery is charged.
^ Ignition is "ON."
^ Connections to the DLC and Battery/CIG. lighter are secure.

2. Follow the most current TECHLINE TERMINAL/equipment instructions.

IF The PCM fails to program, or if DTC 51 sets during programming:

^ Check all PCM connections.
^ Check TECHLINE TERMINAL/equipment for latest software version.
^ Repeat reprogramming procedure. If it fails again, replace the PCM. The replacement PCM must be programmed.