Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Scan Tool Data Definitions - ALC

Scan Tool Data Definitions
Compressor Signal: Indicates when the compressor relay is activated.
Controller Battery Volts: Range 10.0 Volts - 16.0 Volts This data refers to the battery system voltage as measured by the suspension control module.
Exhaust Signal: Indicates when the exhaust solenoid is commanded on or off.
Left Rear Position Sensor: Range 0.5 Volts - 4.85 Volts This data refers to vehicle height measured in visits
Rear Leveling Air Press: Indicates the system pressure in psi.
Rear Leveling Air Press: Indicates the system pressure in volts.
Right Rear Position Sensor: Range 0.5 Volts - 4.85 Volts This data refers to vehicle height measured in volts.
Sensor Supply Voltage: Indicates the voltage being supplied to the sensors from the suspension control module.
Vehicle Speed: The speed of the vehicle.