EI08029 - L91 ECM Replacement, Reprogramming, MIL/SES and/or DTC Set, Driveability Concerns, Reduced Engine Power or Poor Performance (Engineering Information)
| Subject: | EI08029 - L91 ECM Replacement, Reprogramming, MIL/SES and/or DTC Set, Driveability Concerns, Reduced Engine Power or Poor Performance (Engineering Information) |
| Models: | 2006-2008 Chevrolet Aveo |
| with 1.6L 4-Cylinder Engine (VIN 6 - RPO L91) |
| Attention: | Proceed with this bulletin ONLY if the customer has commented about this concern AND the EI number is listed in GMVIS. If the customer has not commented about this condition or the EI does not show in GMVIS, disregard the bulletin and proceed with diagnostics found in published service information. THIS IS NOT A RECALL. Refer to Corporate Bulletin Number 04-00-89-053A for more details on the use of Engineering Information Bulletins. |
Important: "GM of Canada" dealers are NOT authorized to utilize this service bulletin.
Condition
Some customers may comment on an illumination of the MIL/SES or various driveability concerns with one or more of the following symptoms:
| • | Reduced Engine Power |
| • | Rough Idle |
| • | Poor Performance, etc. |
Upon further investigation, the technician may find more than one related ECM DTCs stored in the module.
What Action to Take
Important: Verify that the VIN and mileage is accurate and that the customers concern is accurately documented on the repair order (R.O.).
GM Engineering is attempting to determine the root cause for the rise in engine control module (ECM) replacement. GM Engineering has a need to obtain information first hand from the dealer technician during diagnosis and before repair. As a result, this information will be used by engineering to "root cause" the customer's concern and develop/validate a field fix. Please follow the instructions below depending on the fault present.
Instructions if MIL is On (Current or History Code Exists)
- Check and record all Diagnostic Trouble Codes (DTCs) using a Tech 2®.
- Download all Freeze Frame Data to the computer using TIS Software. Refer to Corporate Bulletin Number 07-07-30-010 for more information on downloading.
- Proceed to diagnose the vehicle using SI diagnostics:
| • | If the ECM contains DTC P0606 - Control Module Internal Performance - and the date code (1) on the ECM is between 5278-6063, then the ECM will need to be replaced. Refer to Engine Control Module Replacement in SI. |
| • | If the ECM contains a calibration-related failure code, then reprogram the ECM using the latest TIS2WEB calibrations. Refer to Service Programming System (SPS) in SI. |
| • | If normal SI diagnostics lead to ECM replacement, e-mail any freeze frame data to jinhee.yu@gm.com and contact GM Calibration Engineer Jinhee Yu at 248-431-9636 for further instructions. |
Instructions if MIL is Off (No Current or History Code Exists) But Customer Concern Can Be Duplicated
Important: Internal fault diagnostic codes or driveability concerns may be caused by factors external to the ECM.
- Attach a Tech 2® and operate the vehicle until the concern is duplicated and create a snap shot of the engine data. Refer to Scan Tool Snapshot Procedure in SI.
- Download the snap shot data to the computer using TIS Software. Refer to Corporate Bulletin Number 07-07-30-010 for more information regarding snap shot and downloading procedures.
- Follow normal SI diagnostics to repair the concern.
If normal SI diagnostics lead to ECM replacement, e-mail any captured data to jinhee.yu@gm.com and contact GM Calibration Engineer Jinhee Yu at 248-431-9636 for further instructions.
Instructions if MIL is Off (No Current or History Code Exists) and Customer Concern Cannot Be Duplicated
Important: DO NOT replace the ECM. Replacement of the ECM may result in a failed repair attempt or customer comeback condition.
Explain to the customer that you are not able to duplicate the concern at this time. Determine if customer is willing to use a data recorder to help diagnose the concern.
| • | If the customer is willing to use a data recorder, install a J 42598 or equivalent vehicle data recorder. Educate the customer on how to use the data recorder and schedule a return service appointment for the customer. |
| • | If at anytime normal SI diagnostics lead to ECM replacement, e-mail any captured data to jinhee.yu@gm.com and contact GM Calibration Engineer Jinhee Yu at 248-431-9636 for further instructions. |
Engineer Contact Information
You may contact the Calibration Engineer Jinhee Yu at 248-431-9636 for additional information or guidance before repairing the vehicle. Please e-mail any freeze frame data or snap shots to jinhee.yu@gm.com. This call may result in a special request to return parts that exhibit unique conditions. In either case, you should receive a response back within two hours on what action to take the same business day of your call (Eastern Daylight Time).
If you do not receive a response from engineering, then proceed to repair the vehicle.
Warranty Information
Important: DO NOT use the labor operation listed below if engineering did not respond.
For vehicles repaired under engineering direction, use:
Labor Operation | Description | Labor Time |
|---|---|---|
J7919* | Engineering Information - ECM Data | 0.5 hr |
Add | Engine Control Module Reprogramming with SPS | 0.4 hr |
Add | Engine Control Module Replacement (Time includes programing with SPS and all configuration times.) | 0.5 hr |
*This labor operation is for bulletin use only. It will not be published in the Labor Time Guide. | ||
