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

A/C System Performance Test

Perform an A/C system performance test as outlined in the 2002 Q45 Electronic Service Manual (ESM) - ATC [Automatic Air Conditioner] Section, page ATC-89, to verify the system is performing to established specification.

^ If the A/C system does not pass the performance test, this bulletin does not apply. Check the A/C system for other causes using the ATC section of the Service Manual.

^ If the A/C system passes the performance test, install the A/C Service Kit and Grille Replacement Kit and complete all of the following Service Procedure steps.