Cadillac ATS AWD V6-3.6L Technical Problem # 12229 Date: 120925
Campaign - Incorrect Outside Temp Reading and Warmer HVAC
2013 Cadillac ATS AWD V6-3.6L 15
SERVICE UPDATE
Bulletin No.: 12229
Date: September 25, 2012
Subject: 12229 Service Update for Inventory and Customer Vehicles Incorrect Outside Temperature Reading and Warmer HVAC Operation
Expires with Base Warranty
Models:
2013 Cadillac ATS, XTS
This service update includes vehicles in dealer inventory and customer vehicles that return to the dealership for any reason. This bulletin
will expire at the end of the involved vehicle's New Vehicle Limited Warranty period.
Purpose
This bulletin provides a service procedure to reprogram the instrument cluster on certain 2013 model year Cadillac ATS and XTS vehicles. The
outside temperature display is approximately 10-20°F (6-12°C) lower than the actual temperature. This can affect the operation of the auto climate
control, resulting in warmer than expected temperatures at certain temperature ranges.
This service procedure should be completed as soon as possible on involved vehicles currently in dealer inventory and customer vehicles
that return to the dealer for any type of service during the New Vehicle Limited Warranty coverage period.
Vehicles Involved
All involved vehicles are identified by VIN in the Global Warranty Management System - Investigate Vehicle History Application. Dealership
technicians should always check this site to confirm vehicle involvement prior to beginning any required inspections and/or repairs. It is important to
routinely use this tool to verify eligibility because not all similar vehicles may be involved regardless of description or option content.
Additionally, 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 GlobalConnect message (Canada) used to release this bulletin. Customer vehicles that
return for service, for any reason, and are still covered under the vehicle's base warranty should also be checked for vehicle eligibility.
Parts Information
No parts are required for this service update.
Service Procedure
Do not attempt to order the calibration number from GM Customer Care and Aftersales. The calibration numbers required for this service procedure
are programmed into control modules via a Multiple Diagnostic Interface (MDI) with the calibration update. When using a MDI for reprogramming,
ensure that it is updated with the latest software version. Use TIS2WEB on or after 09/24/12 to obtain the calibration. If you cannot access the
calibration, call the Techline Customer Support Center and it will be provided.
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 15 volts. The battery must be able to maintain a charge during programming. Only use an
approved Midtronics(R) PSC 550 Battery Maintainer (SPS Programming Support Tool EL-49642) or equivalent to maintain proper battery
voltage during programming.
2. Reprogram the instrument cluster. Refer to SI and Service Programming System (SPS) documentation for programming instructions, if
required.
1. Connect the MDI to the vehicle.
2. Select J2534 MDI and Reprogram ECU from the Select Diagnostic Tool and Programming Process screen.
3. Select P16 Instrument Cluster -- Programming from the Supported Controllers screen.
4. Follow the on-screen instructions.
5. At the Programming Complete screen select "Proceed with same VIN".
6. Select P16 Instrument Cluster -- Setup and Configuration from the Supported Controllers screen.
7. Perform an outside air temperature (OAT) update in GDS2 by selecting Ambient Air Temperature Instant Update in the Control Functions
menu for Instrument Cluster to verify the OAT is accurate.
2013 Cadillac ATS AWD V6-3.6L 16
3. Clear all diagnostic trouble codes (DTCs).
Warranty Transaction Information
Submit a transaction using the table below.
Dealer Program Responsibility
Whenever a vehicle subject to this service update enters your vehicle inventory, or is in your facility for service in the future, and the vehicle is still
covered under the New Vehicle Limited Warranty, you must take the steps necessary to be sure the service update correction has been made before
selling or releasing the vehicle.
Disclaimer
