Savana 3500 V8-6.6L DSL Turbo VIN 6 (2007)
High Idle Switch: Service and Repair
High Idle Switch Programming
Before Programming a Control Module
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.
Ensure the following conditions are met before programming a control module:
*
Vehicle system voltage
-
There is no charging system concern. All charging system concerns must be repaired before programming a control module.
-
Battery voltage is greater than 12 volts but less than 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's 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's battery.
*
Twilight sentinel
*
Interior lights
*
Daytime running lights (DRL)-Applying the parking brake, on most vehicles, disables the DRL system. Refer to the Owner's Manual.
*
HVAC systems
*
Engine cooling fans, etc.
*
The ignition switch is in the proper position. The scan tool 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.
*
All tool connections are secure.
-
The connection at the data link connector (DLC)
-
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.
High Idle Switch Programming
*
Using the Tech 2, select Module Setup/PTO Options
*
Use soft keys to select desired settings.
*
When setting selections are complete, select Reprogram.
Important: The ECM will not operate under the new value until the it has powered down once.
*
Turn OFF the ignition until communication with the ECM is lost, as indicated on the scan tool.
*
Start the vehicle and confirm the new settings by operating the high idle switch.
