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SECTION VIIC<br />
SERVICE PROGRAMMING SYSTEM<br />
5. Locate the PCM and disconnect the vehicle harness connectors from the PCM.<br />
6. Connect the J-45211 harness connectors to the PCM.<br />
7. Connect the J-45211 power clips directly to the vehicle battery terminals. If the battery terminals are<br />
inaccessible, or the battery is not located under the hood, then connect to the engine block (ground),<br />
and to the underhood source of vehicle battery’s positive 12-volt power.<br />
8. Observe the red battery LED on the J-45211. The red LED should remain lit whenever the J-45211 is<br />
connected to the battery voltage. If the red LED does not illuminate, check the tool’s five-amp fuse. If<br />
the fuse is good and yet the red LED will not illuminate, contact 1-800-GM-TOOLS (1-800-468-6657)<br />
for assistance.<br />
9. Toggle the power switch on J-45211 to apply ignition voltage to the PCM.<br />
10. The yellow and green LEDs should illuminate when the power switch is toggled on. The yellow LED<br />
monitors the ignition voltage being applied to the control module. The green LEDs are a feedback<br />
signal from the control module indicating that the modules’s internal circuits are operating.<br />
11. Connect the <strong>Tech</strong> 2 to the J-45211 and enter Service Programming System.<br />
12. Select and perform Request Information.<br />
13. After the <strong>Tech</strong> 2 has <strong>com</strong>pleted the information request, toggle the J-45211 switch off.<br />
14. Turn off the <strong>Tech</strong> 2 and disconnect it from the J-45211.<br />
15. Connect the <strong>Tech</strong> 2 to the <strong>Tech</strong>line terminal. Download the new PCM calibration into the <strong>Tech</strong> 2 using<br />
the <strong>Tech</strong>line terminal and TIS software. After the download into the <strong>Tech</strong> 2 is <strong>com</strong>plete, disconnect the<br />
<strong>Tech</strong> 2 from the <strong>Tech</strong>line terminal.<br />
16. Reconnect <strong>Tech</strong> 2 to J-45211 and toggle the tool’s power switch on.<br />
17. Enter Service Programming System, and select and perform Program.<br />
Procedure for the J-45211 continued on next page...<br />
2005 <strong>Tech</strong> 2 <strong>User</strong>’s <strong>Guide</strong> VII - 64