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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 "1" to "4" >> Test step "1"

Test step "1"

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.

Voltage supply and Ground (GND) connection of operating and display module, Climatronic Control Module J255 

Diagnostic Operation System VAS 5051A, 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
1.1 12 + 13
  • Terminal "30" and Ground (GND) connection at operating and display module, Climatronic Control Module J255
  • Ignition switched off
  • approx. Battery voltage
  • Use wiring diagram to repair voltage supply/Ground (GND) connection
1.2 16 + 13
  • Ground (GND) connection at operating and display module, Climatronic Control Module J255
  • Ignition switched on
  • 0 V
  • Use wiring diagram to locate and eliminate short to positive in Ground (GND) connection (signal Ground (GND))
1.3 12 + 16
  • Ground (GND) connection at operating and display module, Climatronic Control Module J255
  • Ignition switched on
  • 0 V
  • Use wiring diagram to locate and eliminate short to Ground (GND) in Ground (GND) connection (signal Ground (GND))
Diagnostic Operation System VAS 5051A, measurement mode: Multi-meter, voltage measurement (20 V =)
  • Adapter V.A.G 1598/11 connected
Test step Test Box V.A.G 1598A socket Test of
  • Test requirements 
  • Additional operations
 Specified value Corrective actions for deviations from specification
1.4 13 + Ground (GND) * See note Terminal "75" at operating and display module, Climatronic Control Module J255
  • Ignition switched on
  • approx. Battery voltage
  • Use wiring diagram to repair voltage supply to operating and display module, Climatronic Control Module J255
1.5 34 + Ground (GND) * See note
  • Ground (GND) connection at operating and display module, Climatronic Control Module J255
  • Ignition switched on
  • 0 V
  • Use wiring diagram to locate and eliminate short to positive in Ground (GND) connection (signal Ground (GND))
1.6 13 + 34
  • Ground (GND) connection at operating and display module, Climatronic Control Module J255
  • Ignition switched on
  • 0 V
  • Use wiring diagram to locate and eliminate short to Ground (GND) in Ground (GND) connection (signal Ground (GND))

* Ground (GND) is applied to connector "D", contact "13".

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