CTS RWD V8-6.2L SC (2009)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Campaign - ECM Update For Vapor Lock Condition
SERVICE UPDATE
Bulletin No.: 08405
Date: December 05, 2008
Subject:
08405 - Service Update for Inventory Vehicles Only - DTC Codes Stored - Fuel Trim Lean - P0171/P0174 - Expires December 31, 2009
Models:
2009 Cadillac CTS-V
THIS SERVICE UPDATE INVOLVES VEHICLES IN DEALER INVENTORY ONLY AND WILL EXPIRE DECEMBER 31, 2009.
Purpose
This bulletin provides a service procedure to reprogram the ECM on certain 2009 model year Cadillac CTS-V vehicles. On some of these vehicles, the
fuel pressure vs. injector tip temperature model is too low at low ambient temperatures, resulting in fuel vaporization (vapor lock) in one or more
injectors. The Check Engine light will illuminate and DTCs P0171/P0174 will be set.
This service procedure should be completed on involved vehicles currently in dealership inventory as soon as possible but no later than December 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 GM
GlobalConnect (US), or attached to the Dealer Communication (Canada), used to release this bulletin.
Important:
Dealers are to confirm vehicle eligibility prior to beginning repairs by using the GM Vehicle Inquiry System (GMVIS).
Parts Information
No parts are required for this service update.
Service Procedure
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 Multiple Diagnostic Interface (MDI) or Tech 2(R) scan tool and TIS2WEB with the calibration update. Use TIS2WEB on
or after 12/5/08 to obtain the calibration. If you cannot access the calibration, call the Techline Customer Support Center and it will be provided.
Service Programming System (SPS)
For step-by-step programming instructions, please refer to SI and the Techline Information System (TIS) terminal.
1.
Verify that there is a battery charge of 12 to 16 volts. The battery must be able to maintain a charge during programming. Only use an approved
Midtronic 165-PSC charger to maintain proper battery voltage during programming.
2.
Reprogram the engine control module (ECM). Refer to SI and Service Programming System (SPS) documentation for programming instructions, if
required.
1.
Connect the MDI or Tech 2(R) to the vehicle.
Note:
The J2534 MDI is the preferred method, as the MDI will reprogram the module in less time than the Tech 2(R) scan tool.
2.
Select J2534 MDI or J2534 Tech 2(R) Legacy Pass-Thru and Reprogram ECU from the Select Diagnostic Tool and Programming Process
screen.
3.
Select ECM Engine Control Module from the Supported Controllers screen.
4.
Follow the on-screen instructions.
