Operation CHARM: Car repair manuals for everyone.
Home >> Audi >> 2007 >> S4 Quattro Sedan (8EC) V8-4.2L (BHF) >> Repair and Diagnosis >> Heating and Air Conditioning >> Relays and Modules - HVAC >> Control Module HVAC >> Testing and Inspection >> Component Tests and General Diagnostics >> Climatronic Control Module A/C Control Head Electrical Test >> High Pressure Sensor Connector Assignment
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

High Pressure Sensor Connector Assignment






High Pressure Sensor Connector Assignment





Terminal - 1 - Ground (GND)

Contact - 2 - signal output (square wave signal to the Climatronic control module (J255) A/C control head )

Terminal - 3 - B+ (terminal "75")

• With harness connector - B - disconnected, the compressor will not switch on.

• High pressure sensor - A - is an electronic control module; it creates a square wave signal, the duty cycle ratio changes with pressure in the refrigerant circuit => [ High Pressure Sensor Pressure Signal ].
pro multis · About Operation CHARM