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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Scan Tool Cycle Outputs And Indicators

Use a scan tool in order to cycle heater-A/C control air delivery and temperature controls solenoids and motors. This feature may be used in order to determine if the heater-A/C control is able to control a solenoid or motor regardless of the inputs or any specific program instructions. Once a test is selected, the scan tool will command the heater-A/C control to energize the selected solenoid or motor. The displayed information represents only what was heater-A/C control commanded, not if an action has actually taken place. Inspect the heater-A/C control for the ability to control each of the selected solenoid or motor functions through the scan tool.