Test step "4"

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.

Air conditioner positioning motors with potentiometers

NOTE:

The resistance of the potentiometers in the control motors (specification: 3.6 to 5.7 kΩ between contacts "1" and "3") can only be measured directly at the control motor (parallel connection).
The resistance of the potentiometers in the control motors (between contacts "1" and "2 " as well as "3" and "2") is governed by the position of the control motor and is only to be measured with the control motor installed. The upper specification is not attained in test steps "4.1" and "4.2". (To achieve the upper specification, all connectors would have to be disconnected from the other control motors during measurement because of the parallel connection).
If the operating and display module, Climatronic Control Module J255 detects the fault "Potentiometer short to Ground (GND)" or "Open circuit/short to positive", check all potentiometers in the control motors as well as the corresponding wiring.
If several control motors are simultaneously displayed as being defective in the DTC memory and if no malfunction is found in test step "4", check the potentiometers in all control motors and the wiring between the individual control motors for short circuit (e.g. between Defroster Flap Motor V107 and Central Air Flap Motor V70 ; with connectors disconnected from all control motors as well as from operating and display module, Climatronic Control Module J255, the measuring instrument reading between sockets "1", "2" and "3" in the corresponding connector must be "∞ Ω").

Diagnostic Operation System VAS 5051A, measurement mode: Multi-meter, resistance measurement (20 kΩ) 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
4.1	21 + 22	Left Temperature Flap Potentiometer/Actuator G220 (in Left Temperature Flap Motor V158)	Ignition switched off	Greater than 0.1 kΩ and less than 5.7 kΩ	Use wiring diagram to locate and eliminate short circuit, open circuit in wiring or contact resistance
	21 + 23	Right Temperature Flap Potentiometer/Actuator G221 (in Right Temperature Flap Motor V159)		Depending on position of control motor	Replace control motor
	21 + 24	Defroster Flap Motor Position Sensor G135 (in Defroster Flap Motor V107)
	21 + 25	Central Flap Motor Position Sensor G112 (in Central Air Flap Motor V70)
	21 + 26	Recirculation Flap Motor Position Sensor G143 (in Recirculation Flap Motor V113)
	21 + 27	Back Pressure Flap Motor Position Sensor G113 (in Air Flow Flap Motor V71)

NOTE:

The Air Flow Flap Motor V71 is used to activate the air flow/fresh-air flap.

Diagnostic Operation System VAS 5051A, measurement mode: Multi-meter, resistance measurement (20 kΩ) 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
4.2	34 + 22	Left Temperature Flap Potentiometer/Actuator G220 (in Left Temperature Flap Motor V158)	Ignition switched off	Greater than 0.1 kΩ and less than 5.7 kΩ	Use wiring diagram to locate and eliminate short circuit, open circuit in wiring or contact resistance
	34 + 23	Right Temperature Flap Potentiometer/Actuator G221 (in Right Temperature Flap Motor V159)		Depending on position of control motor	Replace control motor
	34 + 24	Defroster Flap Motor Position Sensor G135 (in Defroster Flap Motor V107)
	34 + 25	Central Flap Motor Position Sensor G112 (in Central Air Flap Motor V70)
	34 + 26	Recirculation Flap Motor Position Sensor G143 (in Recirculation Flap Motor V113)
	34 + 27	Back Pressure Flap Motor Position Sensor G113 (in Air Flow Flap Motor V71)

NOTE:

The Air Flow Flap Motor V71 is used to activate the air flow/fresh-air flap.

Diagnostic Operation System VAS 5051A, measurement mode: Multi-meter, resistance measurement (20 kΩ) 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
4.3	Ground (GND) * See note + 22	Left Temperature Flap Potentiometer/Actuator G220 (in Left Temperature Flap Motor V158)	Ignition switched off	∞ Ω	Use wiring diagram to locate and eliminate short to Ground (GND)
	Ground (GND) * See note + 23	Right Temperature Flap Potentiometer/Actuator G221 (in Right Temperature Flap Motor V159)			Replace control motor
	Ground (GND) * See note + 24	Defroster Flap Motor Position Sensor G135 (in Defroster Flap Motor V107)
	Ground (GND) * See note + 25	Central Flap Motor Position Sensor G112 (in Central Air Flap Motor V70)
	Ground (GND) * See note + 26	Recirculation Flap Motor Position Sensor G143 (in Recirculation Flap Motor V113)
	Ground (GND) * See note + 27	Back Pressure Flap Motor Position Sensor G113 (in Air Flow Flap Motor V71)

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

NOTE:

The Air Flow Flap Motor V71 is used to activate the air flow/fresh-air flap.

Diagnostic Operation System VAS 5051A, measurement mode: Multi-meter, resistance measurement (200 Ω) 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
4.4	41 + 42	Left Temperature Flap Motor V158	Ignition switched off	20 to 100 Ω	Use wiring diagram to locate and eliminate short circuit, open circuit in wiring or contact resistance
4.5	51 + 52	Right Temperature Flap Motor V159			Replace control motor
4.6	47 + 48	Recirculation Flap Motor V113
4.7	43 + 44	Defroster Flap Motor V107
4.8	45 + 46	Central Air Flap Motor V70
4.9	49 + 50	Air Flow Flap Motor V71

NOTE:

The Air Flow Flap Motor V71 is used to activate the air flow/fresh-air flap.

Diagnostic Operation System VAS 5051A, measurement mode: Multi-meter, resistance measurement (200 Ω) 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
4.10		Short to Ground (GND) in wiring to control motors
	Ground (GND) * See note + 41	Left Temperature Flap Motor V158	Ignition switched off	∞ Ω	Use wiring diagram to eliminate short to Ground (GND)
	Ground (GND) * See note + 43	Defroster Flap Motor V107
	Ground (GND) * See note + 45	Central Air Flap Motor V70
	Ground (GND) * See note + 47	Recirculation Flap Motor V113
	Ground (GND) * See note + 49	Air Flow Flap Motor V71
	Ground (GND) * See note + 51	Right Temperature Flap Motor V159

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

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
4.11		Short to positive in wiring to control motors
	Ground (GND) * See note + 41	Left Temperature Flap Motor V158	Ignition switched on	Less than 1 V	Use wiring diagram to eliminate short to positive
	Ground (GND) * See note + 43	Defroster Flap Motor V107
	Ground (GND) * See note + 45	Central Air Flap Motor V70
	Ground (GND) * See note + 47	Recirculation Flap Motor V113
	Ground (GND) * See note + 49	Air Flow Flap Motor V71
	Ground (GND) * See note + 51	Right Temperature Flap Motor V159

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