For 1990-2009 cars

#### ECM Scan Tool Output Controls

Scan Tool Output Control | Additional Menu Selection(s) | Description
--- | --- | ---
A/C Relay | Engine Output Controls | The scan tool displays ON or OFF selections. This command allows you to turn the A/C relay On or Off. The A/C clutch cannot be commanded On unless the engine is running and the A/C switch is controlled OFF. When the A/C relay is commanded On, the A/C compressor clutch should be engaged.