Audi Workshop Service and Repair Manuals

Test step 4: positioning motors for the air conditioner and associated potentiometers   Note t  The resistance value for the potentiometers in the positioning motors (specification: 3.6 ... 5.7 kΩ∼ between contacts 1 and 3) can only be measured directly on the positioning motor (parallel connection).

t  Depending on the vehicle production dates, the positioning motors and connectors vary. Up to 01/04 the positioning motors -A- were installed with corresponding connectors -B-; since then (progressive introduction) the positioning motors -C- have been installed with the corresponding connectors -D-. t  The resistance value of the potentiometers in the positioning motors (between contacts “1” and “2”, as well as “3” and “2”) depends on the position of the positioning motor. The resistance value should only be measured with the positioning motor installed. The upper specification is not reached in test steps 4.1 and 4.2. (In order to reach the upper specification, all the connectors would have to be unplugged from the other positioning motors during measurement - parallel connection). t  The assignment of the contacts in the connectors varies; in the positioning motors -A-, the motor is connected to contacts -4- and -6-, and in the positioning motors -C-, the motor is connected to contacts -5- and -6-. t  If the operating and display unit for air conditioner/Climatronic -E87- detects the fault “potentiometer short circuit to earth” or “open circuit/short circuit to positive”, check all the potentiometers (in the 4 positioning motors) and the corresponding wiring. t  If there is more than one positioning motor indicated as faulty at the same time in the fault memory and no fault is detected in test step “4”, check the potentiometers in all the positioning motors and the wiring connecting the individual positioning motors for a short circuit (e.g. between the positioning motor for defrost flap -V107- and the positioning motor for central flap -V70-). If the connectors are unplugged from all the positioning motors and from the operating and display unit for air conditioner/Climatronic -E87-, the meter between sockets “1”, “2” and “3” in the relevant connector must indicate ∞ Ω).

Vehicle diagnostic, testing and information system -VAS 5051-, measurement mode: Multimeter, resistance measurement (20 kΩ) l  Adapter -V.A.G 1598/11- connected
Test step	Test box -V.A.G 1598 A- socket	Being tested: (the wiring to the)		l  Test conditions –  Additional operations		Specification		Remedies if the specification is not attained
4.1	25 and 36	Potentiometer - positioning motor for temperature flap -G92- (in the positioning motor for temperature flap -V68-)		l  Ignition off		t  greater than 0.1 kΩ and less than 5.7 kΩ (depends on the position of the positioning motor)		–  Use the current flow diagram to locate and rectify the short circuit, open circuit or contact resistance –  Replace the positioning motor
	25 and 38	Potentiometer - positioning motor for central flap -G112- (in the positioning motor for central flap -V70-)
	25 and 39	Potentiometer in positioning motor for recirculated-air flap -G143- (in the positioning motor for recirculated-air flap -V113-)
	25 and 37	Potentiometer in positioning motor for defrost flap -G135- (in the positioning motor for defrost flap -V107-)

Vehicle diagnostic, testing and information system -VAS 5051-, measurement mode: Multimeter, resistance measurement (20 kΩ) l  Adapter -V.A.G 1598/11- connected
Test step	Test box -V.A.G 1598 A- socket	Being tested: (the wiring to the)		l  Test conditions –  Additional operations		Specification		Remedies if the specification is not attained
4.2	34 and 36	Potentiometer - positioning motor for temperature flap -G92- (in the positioning motor for temperature flap -V68-)		l  Ignition off		t  greater than 0.1 kΩ and less than 5.7 kΩ (depends on the position of the positioning motor)		–  Use the current flow diagram to locate and rectify the short circuit, open circuit or contact resistance –  Replace the positioning motor
	34 and 38	Potentiometer - positioning motor for central flap -G112- (in the positioning motor for central flap -V70-)
	34 and 39	Potentiometer in positioning motor for recirculated-air flap -G143- (in the positioning motor for recirculated-air flap -V113-)
	34 and 37	Potentiometer in positioning motor for defrost flap -G135- (in the positioning motor for defrost flap -V107-)

Vehicle diagnostic, testing and information system -VAS 5051-, measurement mode: Multimeter, resistance measurement (20 kΩ) l  Adapter -V.A.G 1598/11- connected
Test step	Test box -V.A.G 1598 A- socket	Being tested: (the wiring to the)		l  Test conditions –  Additional operations		Specification		Remedies if the specification is not attained
4.3	Earth → Note and 36	Potentiometer - positioning motor for temperature flap -G92- (in the positioning motor for temperature flap -V68-)		l  Ignition off		t  ∞ Ω		–  Use the current flow diagram to locate and rectify the short circuit to earth
	Earth → Note and 38	Potentiometer - positioning motor for central flap -G112- (in the positioning motor for central flap -V70-)
	Earth → Note and 39	Potentiometer in positioning motor for recirculated-air flap -G143- (in the positioning motor for recirculated-air flap -V113-)
	Earth → Note and 37	Potentiometer in positioning motor for defrost flap -G135- (in the positioning motor for defrost flap -V107-)

1)  Earth is at connector “D”, contacts “13” and “14”.

Vehicle diagnostic, testing and information system -VAS 5051-, measurement mode: Multimeter, resistance measurement (200 Ω) l  Adapter -V.A.G 1598/11- connected
Test step	Test box -V.A.G 1598 A- socket	Being tested: (the wiring to the)		l  Test conditions –  Additional operations		Specification		Remedies if the specification is not attained
4.4	21 + 22	Temperature flap positioning motor -V68-		l  Ignition off		t  20 ... 100 Ω		–  Use the current flow diagram to locate and rectify the short circuit, open circuit or contact resistance
4.5	26 + 27	Central flap positioning motor -V70-						–  Replace the positioning motor
4.6	28 + 29	Recirculated-air flap positioning motor -V113-
4.7	23 + 24	Defrost flap positioning motor -V107-

Vehicle diagnostic, testing and information system -VAS 5051-, measurement mode: Multimeter, resistance measurement (200 Ω) l  Adapter -V.A.G 1598/11- connected
Test step	Test box -V.A.G 1598 A- socket	Being tested: (the wiring to the relevant positioning motor for a short circuit to earth)		l  Test conditions –  Additional operations		Specification		Remedies if the specification is not attained
4.8	Earth → Note and 21	Temperature flap positioning motor -V68-		l  Ignition off		t  ∞ Ω		–  Use the current flow diagram to locate and rectify the short circuit to earth
	Earth → Note and 23	Defrost flap positioning motor -V107-
	Earth → Note and 26	Central flap positioning motor -V70-
	Earth → Note and 28	Recirculated-air flap positioning motor -V113-

2)  Earth is at connector “D”, contacts “13” and “14”.

Vehicle diagnostic, testing and information system -VAS 5051-, measurement mode: Multimeter, voltage measurement (20 V =) l  Adapter -V.A.G 1598/11- connected
Test step	Test box -V.A.G 1598 A- socket	Being tested: (the wiring to the relevant positioning motor for a short circuit to positive)		l  Test conditions –  Additional operations		Specification		Remedies if the specification is not attained
4.9	Earth → Note and 21	Temperature flap positioning motor -V68-		l  Ignition on		t  Less than 1 V		–  Use the current flow diagram to rectify the short circuit to positive
	Earth → Note and 23	Defrost flap positioning motor -V107-
	Earth → Note and 26	Central flap positioning motor -V70-
	Earth → Note and 28	Recirculated-air flap positioning motor -V113-

3)  Earth is at connector “D”, contacts “13” and “14”.