Bulletin No.: PI0592I
Date: Jan-2024

Subject:

Service Programming System (SPS) Errors (E4398, E4399, E4403, M4404, M4413, M6954, M6955, E4414, E4423,
E4491 or E6961)

Models:

2024 and Prior GM Passenger Cars and Light Duty Trucks

Attention:

This PI also applies to any of the above models that may be Export from North America vehicles. International
dealers should contact their local TAC for support.

This PI has been revised to add the 2024 Model Year and the first Important statement. Please discard PI0592H.
Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws applicable to the activities it performs
under this bulletin, including but not limited to handling, deploying, preparing, classifying, packaging, marking, labeling, and shipping
dangerous goods. In the event of a conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you must
follow those applicable laws.

Service Programming System (SPS) Errors
Reference the specific SPS programming error (E4398, E4399, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491 or E6961) and follow the
instructions, which will assist in understanding the cause and how to resolve the issue without replacing the control module. Most errors can be resolved by
following the basic troubleshooting steps below.
If the programming error cannot be resolved using the following troubleshooting instructions, do not replace the control module. Contact the Techline Customer
Support Center (TCSC) for assistance at:
TCSC: 1-800-828-6860 English or 1-800-503-3222 French, 8am-8pm (EST) Monday through Saturday
Information required when calling:

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•
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Dealer BAC
Call back phone number (close proximity to the Techline PC and vehicle)
VIN
Description of service procedure being performed, (ex: bulletin, etc)
Error messages if any

Note: Using a Techline PC and programming device that meets the minimum specifications is essential to successful programming and required for full
support.
E4398 – No Calibration Data
Cause:
This programming error is the result of a missing or incomplete data record. This error is not related to the module being programmed or a vehicle issue.
Resolution:
Contact Techline Customer Support Center (TCSC) for programming instructions.
E4399/E4403 – Severe Error
Cause:
These general programming errors are typically the result of a loss of communication between the programming device and module. The loss of communication
can be caused by a drop in battery voltage, delay in communication with the module or a vehicle issue such as interruption on the BUS (wiring, connector issue,
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aftermarket components, etc.).
Resolution:
Maintain a minimum of 12.5 volts during programming.
Attempt to re-establish communication with the module. This should first be done with GDS2 or Tech 2. If communication can be established, reattempt
programming using “Replace and Program ECU” as the programming method.
If communication cannot be re-established, deplete retained power by disconnecting the negative battery terminal for a minimum of 5 minutes. Re-establish and
maintain battery power, attempt to communicate with the control module using MDI or Tech 2. Reattempt programming using “Replace and Program ECU.”
Some earlier model vehicles (pre-2007) may require the use of the Tech 2 and ‘Legacy Tech 2’ programming option in SPS in order to utilize a slower
programming communication speed.
M4413/E4414/M6954/M6955 – Calibrations marked with an (*)
Cause:
An ( * ) indicates that the SPS application is not recognizing the calibrations being read from the control module. This can be caused by a non-GM calibration
programmed into the control module or an incomplete SPS data record.
Resolution:
Refer to the latest version of Corporate Bulletin Number 08-06-04-006. If this bulletin does not apply, contact TCSC.
M4404 – No Communication with Diagnostic Tool
Cause:
This is a loss of communication between the programming device, (MDI or Tech 2), and Techline PC and not a module or vehicle problem.
Resolution:
Confirm the connection from the PC. If the programming device is connected by USB, select a different USB port on the Techline PC.
If using a wireless network for the MDI connection, confirm the wireless connection or switch to a USB connection (It is important to disable the MDI wireless
connection in the MDI wireless manager when using a USB connection).
If programming with a Tech 2, perform a Tech 2 self-test found in SPS under ‘Settings’, ‘Diagnostics’ then ‘Test Connections.’ Try a known good Techline PC
serial port connector and RS232 cable. A known good Tech 2 and Candi module can be used.
Confirm and maintain proper battery voltage before attempting programming.
E4491/E4423/E6961 – Programming Failed
Cause:
These errors can be the result of an incompatibility between the software/calibrations and the module, a result of a condition that is not being met to allow a
successful programming event (e.g. incorrect voltage and/or aftermarket components), or a vehicle related issue (wiring, connector issue, aftermarket
components, etc.).
Resolution:
This type of issue cannot typically be resolved without assistance from TCSC. Be sure to have the original and service module part numbers and error detail
when contacting TCSC.
This can be confirmed by attempting to program the original module. Typically these errors cannot be resolved without the assistance of TCSC. Do not replace
the module. Contact TCSC and be sure to have the original module part number and the service part number when calling.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may
occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools,
safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that
your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

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