Operation CHARM: Car repair manuals for everyone.
Home >> Audi >> 2007 >> S4 Quattro Sedan (8EC) V8-4.2L (BHF) >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - HVAC >> Control Module HVAC >> Testing and Inspection >> Component Tests and General Diagnostics >> Climatronic Control Module A/C Control Head Electrical Test >> Test Step 7
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

Test Step 7






Test Step 7

Sunlight Photo Sensor (G107)

• The Climatronic control module (J255) A/C control head and the sunlight photo sensor (G107) are available in various versions. Therefore follow the assignment exactly when replacing an A/C control head.

• Starting with VIN "400000" of model year 2005 (Sedan and Avant) and "012913" of model year 2005 (Cabrio), a modified sunlight photo sensor (G107) and a modified Climatronic control module (J255) A/C control head are installed. Only the sunlight photo sensor (G107) with part number 8E0 907 539 may be installed for the Climatronic control module (J255) A/C control head with a part number up to index "AH". Only the sunlight photo sensor (G107) with part number 8P0 907 539 may be installed for the Climatronic control module (J255) A/C control head with a part number from index "AJ".

• If the assignment between the sunlight photo sensor (G107) and the Climatronic control module ( J255) A/C control head is incorrect, the Climatronic control module (J255) A/C control head cannot evaluate the signal from the sunlight photo sensor (G107) and the A/C system control will malfunction.





* Ground applied to connector "D", terminal "13".





* Ground applied to connector "D", terminal "13".








pro multis · About Operation CHARM