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



SCAN TOOL DATA DEFINITIONS

Battery 1: The scan tool displays 0-20 Volts. The scan tool displays the voltage as received on the battery positive voltage circuit of the BCM.

Generator F-Terminal (L66): The scan tool displays the percentage of the field current.

Generator L-Terminal (L61): The scan tool displays Enabled/Disabled. The scan tool displays Disabled until the engine is running, then the ECM supplies then the percentage value varies depending on electrical loads.

Generator L-Terminal (L66): The scan tool displays Active/Inactive. The scan tool displays Inactive until the engine is running, then the PCM supplies then the percentage value varies depending on electrical loads.

Ignition 1 (L61): The scan tool displays 0-20 Volts. The scan tool displays the voltage as received on the Ignition 1 circuit to the ECM.

Ignition 1 (L66): The scan tool displays 0-20 Volts. The scan tool displays the voltage as received on the Ignition 1 circuit to the PCM.