Astra L4-1.8L (2009)
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Pin 1 GMLAN low speed communications terminal
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Pin 4 Scan tool power ground terminal
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Pin 5 Common signal ground terminal
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Pin 6 High speed GMLAN serial data bus (+) terminal
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Pin 7 Keyword 2000 serial data bus terminal
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Pin 14 High speed GMLAN serial data bus (-) terminal
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Pin 16 Scan tool power, battery positive voltage terminal
Serial Data Reference
The scan tool communicates over the various busses on the vehicle. When a scan tool is installed on a vehicle, the scan tool will try to communicate with
every module that could be optioned into the vehicle. If an option is not installed on the vehicle, or a module is not communicating that is installed, the
scan tool will not display that control module.
