Engine Control Module: Testing and Inspection

STANDARD PROCEDURE - PCM/SKREEM PROGRAMMING

NOTE: Before replacing the PCM, be sure to check the related component/circuit integrity for failures not detected due to a double fault in the circuit. Most PCM failures are caused by internal component failures (i.e. relays and solenoids) and shorted circuits (i.e. pull-ups, drivers, and switched circuits). These failures are difficult to detect when a double fault has occurred and only one DTC has been set.

When a Powertrain Control Module (PCM) and the Sentry Key Remote Entry Module (SKREEM) are replaced at the same time, perform the following steps:

1. Using the scan tool, follow the on screen instructions to program the new PCM.
2. Using the scan tool, follow the on screen instructions to program the new Sentry Key Remote Entry Module.
3. Replace all ignition keys and program them to the new Sentry Key Remote Entry Module.
PROGRAMMING THE PCM

The Sentry Key Remote Entry System Secret Key is an ID code that is unique to each Sentry Key Remote Entry Module. This code is programmed and stored in the Sentry Key Remote Entry Module, the PCM, and the ignition key transponder chip(s). When replacing the PCM, the scan tool will program the secret key into the new PCM.

NOTE: If three attempts are made to enter secure access mode using an incorrect PIN, secured access mode will be locked out for one hour. To exit this lockout mode, turn the ignition switch to the ON/RUN position for one hour, then enter the correct PIN. (Ensure all accessories are turned off. Also monitor the battery state and connect a battery charger if necessary).

PROGRAMMING THE SENTRY KEY REMOTE ENTRY MODULE

NOTE: Be sure to enter the correct country code. If the incorrect country code is programmed into the Sentry Key Remote Entry Module, it cannot be changed and the Sentry Key Remote Entry Module must be replaced.

1. Program ignition keys to the Sentry Key Remote Entry Module.

NOTE: If the PCM and the Sentry Key Remote Entry Module are replaced at the same time, all vehicle ignition keys will need to be replaced and programmed to the new Sentry Key Remote Entry Module.

PROGRAMMING IGNITION KEYS TO THE SENTRY KEY REMOTE ENTRY MODULE

NOTE: A maximum of eight keys can be learned to each Sentry Key Remote Entry Module. Once a key is learned to an Sentry Key Remote Entry Module it (the key) cannot be transferred to another vehicle.

1. Obtain ignition keys to be programmed from the customer (8 keys maximum).
2. Using the scan tool, erase all ignition keys.
3. Program all of the ignition keys.
If ignition key programming is unsuccessful, the scan tool will display a failure message.