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

Heat Output Test Requirements







Heat Output Test Requirements

Coolant circuit has been bled according to specifications.

All air ducts, covers and seals OK and properly installed

Air flow through dust and pollen filter not obstructed by dirt.

Engine is warm

Climatronic control module (J255) DTC memory was checked and erased, basic setting was performed and Climatronic control module coding was checked. Refer to Vehicle diagnosis, testing and information system (VAS5051B) under "Guided Fault Finding".

The Climatronic control module was checked. Refer to Vehicle diagnosis, testing and information system (VAS5051B) under "Guided Fault Finding".

Vehicle not exposed to sunlight.