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)

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A/C Cooldown Test

A/C COOLDOWN TEST

The A/C Cooldown Test:
- is actuated with a scan tool.
- tests A/C system performance based on evaporator temperature sensor input. - will fail if evaporator temperature is below 18.3 �C (65 F) when initiating the test.
- will pass if the evaporator temperature drops 11.1 �C (20 �F).
- indicates an outcome by displaying one or more test status messages on the scan tool. These test status messages will clear after paging back out of this test function. Therefore, is it important to note all of the messages before doing so.
- will cause the A/C status indicator to flash while the test is running.