Engine Control Module: Testing and Inspection

STANDARD PROCEDURE - PCM/SKIM 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 driver/control circuit 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 PCM (JTEC) and the SKIM are replaced at the same time, perform the following steps in order:
1. Program the new PCM (JTEC).
2. Program the new SKIM.
3. Replace all ignition keys and program them to the new SKIM.

Programming the PCM (JTEC)
The SKIS Secret Key is an ID code that is unique to each SKIM. This code is programmed and stored in the SKIM, the PCM, and the ignition key transponder chip(s). When replacing the PCM, it is necessary to program the secret key into the new PCM using the DRB III scan tool. Perform the following steps to program the secret key into the PCM.
1. Turn the ignition switch to the ON position (transmission in Park/Neutral).
2. Use the DRB III and select THEFT ALARM, SKIM, then MISCELLANEOUS.
3. Select PCM REPLACED (GAS ENGINE).
4. Enter secured access mode by entering the vehicle four-digit PIN.
5. Select ENTER to update PCM VIN.

NOTE: If three attempts are made to enter secured 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 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).

6. Press ENTER to transfer the secret key (the SKIM will send the secret key to the PCM).
7. Press PAGE BACK to get to the Select System menu and select ENGINE, MISCELLANEOUS, and SRI MEMORY CHECK.
8. The DRB III will ask, "Is odometer reading between XX and XX?" Select the YES or NO button on the DRB III. If NO is selected, the DRB III will read, "Enter Odometer Reading (From I.R odometer)". Enter the odometer reading from the instrument cluster and press ENTER.

Programming the SKIM
1. Turn the ignition switch to the ON position (transmission in Park/Neutral).
2. Use the DRB III and select THEFT ALARM, SKIM, then MISCELLANEOUS.
3. Select PCM REPLACED (GAS ENGINE).
4. Program the vehicle four-digit PIN into SKIM.
5. Select COUNTRY CODE and enter the correct country.

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

6. Select YES to update VIN (the SKIM will learn the VIN from the PCM).
7. Press ENTER to transfer the secret key (the PCM will send the secret key to the SKIM).
8. Program ignition keys to the SKIM.

NOTE: If the PCM and the SKIM are replaced at the same time, all vehicle ignition keys will need to be replaced and programmed to the new SKIM.

Programming Ignition Keys to the SKIM
1. Turn the ignition switch to the ON position (transmission in Park/Neutral).
2. Use the DRB III and select THEFT ALARM, SKIM, then MISCELLANEOUS.
3. Select PROGRAM IGNITION KEY'S.
4. Enter secured access mode by entering the vehicle four-digit PIN.

NOTE: A maximum of eight keys can be learned to each SKIM. Once a key is learned to a SKIM it (the key) cannot be transferred to another vehicle.

5. Obtain ignition keys to be programmed from the customer (8 keys maximum).
6. Using the DRB III, erase all ignition keys by selecting MISCELLANEOUS, and ERASE ALL CURRENT IGN. KEYS.
7. Program all of the ignition keys.

If ignition key programming is unsuccessful, the DRB III will display one of the following messages:
- Programming Not Attempted - The DRB III attempts to read the programmed key status and there are no keys programmed into SKIM memory.
- Programming Key Failed (Possible Used Key From Wrong Vehicle) - SKIM is unable to program an ignition key transponder due to one of the following:
- The ignition key transponder is faulty
- The ignition key transponder is or has been already programmed to another vehicle.
- 8 Keys Already Learned, Programming Not Done - The SKIM transponder ID memory is full.
- Learned Key In Ignition - The ID for the ignition key transponder currently in the ignition lock cylinder is already programmed in SKIM memory.