Service Update for Inventory Vehicles Only-Cold Start P1400 OBD System Improvements-Reprogram ECM
| Subject: | 07338A -- Service Update for Inventory Vehicles Only - Cold Start P1400 On-Board Diagnostic (OBD) System Improvement - Reprogram ECM - Expires January 31, 2009 |
| Models: | 2008 Cadillac Escalade |
| 2008 GMC Sierra, Yukon, Yukon XL |
| 2008 HUMMER H2 |
| Equipped with 6.2L V8 (RPO L92 - VIN 8) Engine and |
| Located in Canada and the following United States: |
| Alaska, Colorado, Connecticut, Delaware, Idaho, Illinois, Indiana, Iowa, Kansas, Maine, Maryland, Massachusetts, Michigan, Minnesota, Montana, Nebraska, New Hampshire, New Jersey, New York, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Dakota, Utah, Vermont, Virginia, Washington, Wisconsin, Wyoming |
THIS SERVICE UPDATE BULLETIN IS BEING REVISED TO EXTEND THE EXPIRATION DATE AND UPDATE THE SERVICE PROCEDURE.
THIS SERVICE UPDATE INVOLVES VEHICLES IN DEALER INVENTORY ONLY AND WILL EXPIRE JANUARY 31, 2009.
Purpose
This bulletin provides a service procedure to reprogram the Engine Control Module (ECM) calibration on certain 2008 Cadillac Escalade; GMC Sierra, Yukon, Yukon XL; and HUMMER H2 vehicles, equipped with a 6.2L V8 (RPO L92 - VIN 8) engine. The revised calibration corrects a Service Engine Soon (SES) light for DTC P1400 after a cold start. To verify if an updated calibration is required, refer to the following procedure in this bulletin.
This service procedure should be completed on involved vehicles currently in dealership inventory as soon as possible, but no later than January 31, 2009, at which time this bulletin will expire.
Vehicles Involved
A list of involved vehicles currently in dealer inventory is available on the "Service Update Bulletin Information" link under the "Service" tab in DealerWorld (US), or attached to the Dealer Communication (Canada), used to release this bulletin.
Year | Division | Model | From | Through |
|---|---|---|---|---|
2008 | Cadillac | Escalade | 8G100005 | 8G196442 |
2008 | Cadillac | Escalade | 8R100004 | 8R182520 |
2008 | GMC | Sierra | 81100013 | 81225884 |
2008 | GMC | Yukon | 8J100015 | 8J170583 |
2008 | GMC | Yukon XL | 8J100041 | 8J170560 |
2008 | HUMMER | H2 | 8H100001 | 8H104988 |
Important: Dealers are to confirm vehicle eligibility prior to beginning repairs by using the GM Vehicle Inquiry System (GMVIS). Not all vehicles within the above breakpoints may be involved.
Calibration Information
Do not attempt to order the calibration number from GMSPO. The calibration numbers required for this service procedure are programmed into control modules via a Techline Tech 2® scan tool and the Techline Information System (TIS) 2000 terminal with the calibration update. Use data version 12.0 for 2007 or later, available on TIS 2 Web November 26, 2007 ; and on TIS DVD version 12.0/ 2007 or later, mailed to dealers beginning December 5, 2007. If you cannot access the calibration, call the Techline Customer Support Center and it will be provided.
Service Procedure
GMVIS must be checked to determine if a specific vehicle requires this action. If the system indicates that Service Update Bulletin 07338 remains ‘open’ and ECM reprogramming has not taken place, reprogram the ECM using a Tech 2® scan tool with the calibration update from TIS 2 Web.
Service Programming System (SPS)
For step-by-step programming instructions, please refer to SI and the Techline Information System (TIS) terminal.
Review the information below to ensure proper programming protocol
Important:
• DO NOT program a control module unless you are directed by a service procedure or you are directed by a General Motors Corporate service bulletin. Programming a control module at any other time will not permanently correct a customer's concern. • It is essential that the Multiple Diagnostic Interface (MDI) or Tech 2® and the TIS terminal are equipped with the latest sofware before performing (SPS). • Due to the time requirements of programming a controller, it is recommended that an external power source be used to maintain system voltage. Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of
voltage will interrupt programming. To ensure trouble-free programming, GM recommends using one of the following external power sources: - A Midtronics PCS charger - A fully charged 12V jumper or booster pack disconnected from the AC voltage supply • Some modules will require additional programming/setup events performed before or after programming. • Some vehicles may require the use of a CANDi module for programming. • Review the appropriate service information for these procedures. • DTCs may set during programming. Clear DTCs after programming is complete. • Clearing powertrain DTCs will set the Inspection/Maintenance (I/M) system status indicators to NO.
Ensure the following conditions are met before programming a control module:
| • | FlexFuel (E85) Vehicles |
| - | The fuel composition learn function is inactive. Programming with the fuel composition learn active will result in fuel trim DTCs. |
| - | If necessary, drive the vehicle until the scan tool indicates that the fuel composition learn is inactive. |
| • | Vehicle System Voltage |
| - | There is not a charging system concern. All charging system concerns must be repaired before programming a control module. |
| - | Battery voltage is greater than 12 volts, but less than 16 volts. The battery must be fully charged before programming the control module. |
| - | Turn OFF or disable any system that may put a load on the vehicle battery, such as the following components: |
| - | Twilight sentinel |
| - | Interior lights |
| - | Daytime running lights (DRL) - Applying the parking brake, on most vehicles, disables the DRL system |
| - | Heating, ventilation, and air conditioning (HVAC) systems |
| - | Engine cooling fans, radio, etc. |
| • | The ignition switch must be in the proper position. SPS prompts you to turn ON the ignition, with the engine OFF. DO NOT change the position of the ignition switch during the programming procedure, unless instructed to do so. |
| • | Make certain all tool connections are secure, including the following components and circuits: |
| - | The RS-232 communication cable port |
| - | The connection at the data link connector (DLC) |
| - | The voltage supply circuits |
| • | DO NOT disturb the tool harnesses while programming. If an interruption occurs during the programming procedure, programming failure or control module damage may occur. |
| • | DO NOT turn OFF the ignition if the programming procedure is interrupted or unsuccessful. Ensure that all control module and DLC connections are secure and the Tech 2® operating software is up to date. |
- Verify that there is a battery charge of 12 to 16 volts. The battery must be able to maintain a charge during programming. Use an additional jump battery, if necessary. Only use approved Midtronics charger or Jumper Packs, etc. to maintain proper battery voltage during programming.
- Reprogram the engine control module (ECM). Refer to SI and Service Programming System (SPS) documentation for ECM programming instructions, if required.
- Using the MDI or Tech 2®, clear all DTCs if required.
| 2.1. | Connect the MDI or Tech 2® to the vehicle. |
| Important: Select J 2534 MDI or Tech 2® Legacy Pass-Thru and Reprogram ECU from the Select Diagnostic Tool and Programming Process screen. The J 2534 MDI will reprogram the module in less time than the Tech 2® scan tool. |
| 2.2. | Select ECM Engine Control Module from the Supported Controllers screen. |
| 2.3. | Follow the on-screen instructions. |
Claim Information
For vehicles repaired under this service update, use:
Labor Operation | Description | Labor Time |
|---|---|---|
V1779 | Reprogram Engine Control Module (ECM) | 0.4 |
