Campaign - Engine Hesitation At Start Up
# 11231: Service Update for Inventory and Customer Vehicles - Engine Hesitation at Start Up Under High Accessory Loads-Reprogram ECM - (Aug 24, 2011)Subject:
11231--Service Update for Inventory and Customer Vehicles - Engine Hesitation at Start Up Under High Accessory Loads - Reprogram ECM - Expires with Base Warranty
Models:
2012 Chevrolet Cruze
Equipped with a 1.4L Turbo Engine (LUJ)
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 engine control module on certain 2012 model year Chevrolet Cruze vehicles equipped with a 1.4L turbo engine (LUJ). This service update will address a condition where, under heavy accessory loads (generator and/or A/C compressor) and hot ambient temperature conditions, some vehicles could experience a slight engine hesitation on the first accelerator pedal apply and/or DTC P0506. Normal acceleration will resume on the next pedal apply.
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 (GMVIS2) 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 Involved
No parts are required for this 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 TIS2 WEB on or after 08/23/11 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 engine control module (ECM). Refer to SI and Service Programming System (SPS) documentation for programming instructions.
2.1. Connect the MDI to the vehicle.
2.2. Select J2534 MDI and Reprogram ECU from the Select Diagnostic Tool and Programming Process screen.
2.3. Select ECM Engine Control Module - Programming from the Supported Controllers screen.
2.4. Follow the on-screen instructions.
3. After programming the ECM, return to the SPS Supported Controllers screen and select ECM Engine Control Module (Automatic Transmission) 3/4 Setup or ECM Engine Control Module (Manual Transmission) 3/4 Setup and follow the on-screen instructions.
4. Clear all diagnostic trouble codes (DTCs).
5. Start the vehicle and confirm that there are no messages on the driver information center display or any telltales illuminated.
Warranty Transaction Information
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