For step-by-step programming instructions, please refer to the techline information
system (TIS) terminal.
Review the information below to ensure proper programming protocol.
Important: DO NOT program a control module, unless you
are directed by a service procedure, or you are directed by a General Motors Corporation
service bulletin. Programming a control module at any other time will not permanently
correct a customer's concern.
It is essential that the Tech 2 and
the TIS terminal are both equipped with the latest software before performing service
programming system (SPS).
Some modules will require additional programming/setup events be performed before
or after programming.
Review the appropriate service information for these procedures.
Ensure the following conditions are met before programming a control module:
| - | There is no charging system concern. All charging system concerns must
be repaired before programming a control module. |
| - | Battery voltage is between 12-16 volts. The battery must
be charged before programming the control module if the battery voltage is low. |
| - | A battery charger is NOT connected to the vehicle battery. Incorrect system
voltage or voltage fluctuations from a battery charger, may cause programming failure
or control module damage. |
| - | Turn OFF or disable any system that may put a load on the vehicle battery,
such as the following components: |
| • | Daytime running lamps (DRL)--Applying the parking brake, on most
vehicles, disables the DRL system. Refer to the Owner's manual. |
| • | Heating, ventilation, and air conditioning (HVAC) systems |
| • | Engine cooling fans, radio, etc. |
| • | The ignition switch must be in the proper position. The Tech 2
prompts you to turn ON the ignition, with the engine OFF. DO NOT change the position
of the ignition switch during the programming procedure, unless instructed to do so.
The ignition mode switch has 2 contact buttons. |
| | The upper button,
with a circle indicator on it, starts the engine if brake pedal is applied. |
| | The bottom one has 2 indicators on it, O and ACC. This button cycles
the ignition through the following modes: |
| - | OFF--This is the normal state upon entering the vehicle, and can
also be reached from any other mode by depressing the button. The O indicator illuminates. |
| - | Accessory--This mode can be reached from the OFF state by depressing
the button. The ACC indicator illuminates. |
| - | ON with the engine OFF--This state can be reached from the OFF or
Accessory modes by depressing the button for about 5-6 seconds. The upper
LED illuminates. |
| • | Make certain all tool connections are secure, including the following
components and circuits: |
| - | The control module Serial Data Link Tester |
| - | The RS-232 communication cable port |
| - | The connection at the data link connector (DLC) |
| - | The voltage supply circuits |
| • | DO NOT disturb the tool harnesses while programming. If an interruption
occurs during the programming procedure, programming failure or control module damage
may occur. |
| • | DO NOT turn OFF the ignition if the programming procedure is interrupted
or unsuccessful. Ensure that all control module and DLC connections are secure and
the TIS terminal operating software is up-to-date. Attempt to reprogram the control
module. If the control module cannot be programmed, replace the control module. |
