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

Compressor Shut Off Signal

COMPRESSOR SHUT OFF SIGNAL (if applicable)

The IHKA module monitors the full load input from the ECM. It the ECM detects "full load" conditions, it signals (KOREL) the IHKA control module to disengage the A/C compressor. The conditions for full load are:

- Vehicle speed less than 10 mph, and
- Throttle is wide open or
- Engine coolant temperature is too high

The compressor is turned off for a maximum of 4 minutes (actual duration differs per system).