Camaro V8-6.2L (2010)
the systems functionality is required. Once the CGI network is awake, all message transfers on the CGI are initiated by the Radio. Slave devices such as
the Info Display Module and Radio/HVAC Control may not transmit unless they are responding to a request from the Radio.
Dual wire CGI networks have a termination resistance between the CGI+ (CAN- High) and CGI- (CAN- Low) conductors at each end of the bus. Each
termination resistance is 120 ohms.
The communication function of the CGI shall be enabled or disabled based on the voltage level of a dedicated input (typically called "Center Stack
Wake"). The network will stay awake as long as this discrete signal is driven low to less than 1.5 V. When the Radio determines that the communication
bus needs to be operational or active, it shall generate the wake-up signal by pulling this signal circuit low.
The Radio can execute a warm reset of the Info Display Module if the Info Display Module fails to respond to Radio's request via the CGI interface.
Center Stack Reset is a low-asserted pull down output (less than 1.5 V) from the Radio to the Info Display Module and has the same electrical
characteristics as those for the Center Stack Wake signal defined above.
Powertrain High Speed GMLAN Circuit Description
The high speed GMLAN powertrain expansion bus is a subsystem communications bus exclusively for Powertrain and Hybrid subsystem and functions
the same as the high speed GMLAN bus. All diagnostic information is available through the primary high speed GMLAN bus only. The bus is optional
based upon feature content. Since the high speed GMLAN powertrain expansion bus and the primary high speed GMLAN bus operate in the same
manner, the diagnostics are for each are similar. However, the diagnostics for the high speed GMLAN powertrain expansion bus are done on auxiliary
data connector.
High Voltage Energy High Speed GMLAN Circuit Description
The high speed GMLAN high voltage energy expansion bus is a subsystem communications bus exclusively for Hybrid subsystem and functions the
same as the high speed GMLAN bus. All diagnostic information is available through the primary high speed GMLAN bus only. The bus is optional
based upon feature content. Since the high speed GMLAN high voltage energy expansion bus and the primary high speed GMLAN bus operate in the
same manner, the diagnostics are for each are similar. However, the diagnostics for the high speed GMLAN high voltage energy expansion bus are done
on auxiliary data connector.
Communication Enable Circuit Description
The communication enable circuit (or wake up circuit) is a 12 V circuit used to provide ignition power to enable communication on some high speed
GMLAN modules.
Data Link Connector (DLC)
The data link connector (DLC) is a standardized 16-cavity connector. Connector design and location is dictated by an industry wide standard, and is
required to provide the following:
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Pin 1 Low speed GMLAN communications terminal
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Pin 3 Mid speed GMLAN serial bus (+) 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 11 Mid speed GMLAN serial bus (-) terminal
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Pin 12 Chassis high speed GMLAN serial bus (+) terminal
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Pin 13 Chassis high speed GMLAN serial 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
Auxiliary Data Connector
The auxiliary data connector is a standardized 16-cavity connector. This connector shall be available on all vehicles that require service programming for
controllers on the Powertrain Expansion Bus for Hybrid applications only. Diagnostics shall be available via the data link connector (DLC), and not
provided via the auxiliary data connector. The pinouts for this auxiliary data connector are as follows:
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Pin 3 High voltage energy high speed GMLAN serial bus (+) 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 8 Ground terminal for auxiliary data connector identification
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Pin 11 High voltage energy high speed GMLAN serial bus (-) terminal
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Pin 12 Powertrain high speed GMLAN serial bus (+) terminal
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Pin 13 Powertrain high speed GMLAN serial bus (-) terminal
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Pin 16 Scan tool power, battery positive voltage terminal