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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 1499 (Heating & Air Conditioning (On Board Diagnostic)) >> 01 On Board Diagnostic (OBD) >> Automatic Climate Control System, electrical testing >> Test steps "5" to "9" >> Test step "6"

Test step "6"

WARNING: This page is about a different car, the 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Activation for A/C Compressor Regulator Valve N280 

Diagnostic Operation System VAS 5051A, measurement mode: Multi-meter, resistance measurement (200 Ω)
  • Adapter - 16 Terminals V.A.G 1598/12 connected
Test step Test Box V.A.G 1598A socket Test of
  • Test requirements 
  • Additional operations
 Specified value Corrective actions for deviations from specification
6.1 3 + 13 Wiring to A/C Compressor Regulator Valve N280
  • Ignition switched on
  • Greater than 5 Ω and less than 20 Ω
  • Use wiring diagram to locate and eliminate open circuit or contact resistance in wiring between A/C Compressor Regulator Valve N280 and operating and display module, Climatronic Control Module J255 or in Ground (GND) connection to A/C Compressor Regulator Valve N280.
  • Use wiring diagram to locate and eliminate short to Ground (GND) in connection between A/C Compressor Regulator Valve N280 and operating and display module, Climatronic Control Module J255.
Diagnostic Operation System VAS 5051A, measurement mode: Multi-meter, voltage measurement (20 V =)
  • Adapter - 16 Terminals V.A.G 1598/12 connected
Test step Test Box V.A.G 1598A socket Test of
  • Test requirements 
  • Additional operations
 Specified value Corrective actions for deviations from specification
6.2 3 + 13 Wiring to A/C Compressor Regulator Valve N280
  • Ignition switched on
  • Less than 1 V
  • Use wiring diagram to locate and eliminate short to positive in connection between A/C Compressor Regulator Valve N280 and operating and display module, Climatronic Control Module J255.
Diagnostic Operation System VAS 5051A, measurement mode: Multi-meter, current measurement (10 A DC)
  • Adapter - 16 Terminals V.A.G 1598/12 connected
Test step Test Box V.A.G 1598A socket Test of
  • Test requirements 
  • Additional operations
 Specified value Corrective actions for deviations from specification
6.3 3 + 12 Current measurement via A/C Compressor Regulator Valve N280
  • Ignition switched on
  • Greater than 0.5 A and less than 1.5 A
  • Use wiring diagram to locate and eliminate short to Ground (GND) or open circuit in wiring between A/C Compressor Regulator Valve N280 and operating and display module, Climatronic Control Module J255
  • A/C Compressor Regulator Valve N280 defective, replace compressor → Refrigerant Circuit Components, Replacing
NOTE:
  • During operation, the output of the compressor is influenced via the A/C Compressor Regulator Valve N280.
  • The operating and display module, Climatronic Control Module J255 regulates the current flowing via the A/C Compressor Regulator Valve N280 and thus the compressor output (reading measuring value block, display group "001") → Read Measuring Value Block (function 08) .
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