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A4 Mk1

Automatic gearbox 01N Self-diagnosis
Electrical test
Electrical test
 
W37-0010
  • ◆ V.A.G 1526 A Hand multimeter
  • ◆ V.A.G 1594 A Adapter set
  • ◆ V.A.G 1598/18 Test box

Additional information required

  • ◆ Workshop Manual Audi A4 1995 ä,
    Automatic gearbox 01N
  • ◆ Binder: "Current flow diagrams, Electrical fault-finding and Fitting locations"

Test requirements:

  • ● Battery voltage in order.
  • ● Fuses in order

=> "Current flow diagrams, Electrical fault finding and Fitting locations" binder

  • ● Earth connections and gearbox earthing point in order

=> "Current flow diagrams, Electrical fault finding and Fitting locations" binder

  • ‒ Check earth connections for corrosion and poor contact; repair if necessary.
  • ‒ Check battery earth strap and earth strap between battery and gearbox.
Warning!
Select the appropriate measuring range at the tester before connecting the test leads to avoid damaging the electronic components.

Notes:

  • ◆ The specified values are valid for an ambient temperature from 0 °C...40 °C.
  • ◆ If the readings obtained differ from the specified values, determine fault on the basis of the current flow diagram.
  • ◆ If the readings obtained differ only slightly from the specified values, clean sockets and connectors of the testers and test leads and repeat test. Before replacing the particular components, test wiring and connections and, particularly if specified values are below 10 ω, repeat resistance measurement on component.

Performing electrical test
 
N37-0253

Note:

  • ◆ Observe test requirements

Control unit is located in front of right-hand seat under cover in footwell, Fig.1.

  • ‒ → Switch ignition off, release multi-pin connector in direction of arrow, and pull off control unit.
 
N37-0139
  • ‒ → Fit test box V.A.G 1598/18 onto multi-pin connector (1) and lock, in direction of arrow (2).

Using test box V.A.G 1598/18 the wiring can be checked according to current flow diagram.
 
N37-0267

After electrical checks

  • ‒ → Fit multi-pin connector on control unit -J217- and lock.

When fitting ensure that the guides (arrows) are engaged on control unit pins.

Multi-pin connector (68 pin) on control unit -J217- (sockets on V.A.G 1598/18)

1-

Earth (terminal 31)

20-

Road speed sender -G68-

2-

Vacant

21-

Gearbox speed sender -G38-

3-

Vacant

22-

Solenoid valve 6 -N93- supply voltage

4-

Vacant

23-

Supply voltage (terminal 15)

5-

Vacant

24-

Diagnosis K-wire

6-

Gearbox oil temperature sender -G93 (ATF)

25-

Vacant

7-

Vacant

26-

Vacant

8-

Vacant

27-

Vacant

9-

Solenoid valve 3 -N90-

28-

Vacant

10-

Solenoid valve 7 -N94-

29-

Selector lever lock solenoid -N110-

11-

Park/neutral signal

30-

Vacant

12-

Kickdown for air conditioner

31-

Fan activation (diesel engine)

13-

Ignition timing influence

32-

Vacant

14-

Vacant

33-

Vacant

15-

Brake light switch -F- signal voltage

34-

Vacant

16-

Kickdown switch -F8-

35-

Vacant

17-

Vacant

36-

Vacant

18-

Multi-function switch -F125-

37-

Vacant

19-

TD (revolution) signal

38-

Vacant

39-

Vacant

54-

Solenoid valve 2 -N89-

40-

Multi-function switch -F125-

55-

Solenoid valve 1 -N88-

41-

Engine load signal (throttle valve value) from engine control unit 1)

56-

Solenoid valve 5 -N92-

42-

Vacant

57-

Selector lever position display

43-

Road speed sender -G68- (screening)

58-

Solenoid valve 6 -N93-

44-

Gearbox speed sender -G38- (screening)

59-

Vacant

45-

Supply voltage (terminal 30)

60-

Cruise control system (input terminal15)

46-

Vacant

61-

Cruise control system (output)

47-

Solenoid valve 4 -N91-

62-

Multi-function switch -F125-

48-

Vacant

63-

Multi-function switch -F125-

49-

Vacant

64-

Vacant

50-

Vacant

65-

Road speed sender -G68-

51-

Vacant

66-

Gearbox speed sender -G38-

52-

Vacant

67-

Solenoid valves voltage supply

53-

Vacant

68-

Vacant

1)    Signal (contact 41) directed via engine control unit to gearbox control unit and can only be checked in "Reading measured value block" => Page 01-66.

List of test steps (multi-pin connector with 68 pins)

    Only perform test steps for the relevant component as listed in fault finding table and read measured value block.

Component to be tested

Component to be tested

Supply voltage for control unit -J217

- Perform test step 1

Solenoid valve 5 -N92

- Perform test step 10

Selector lever lock solenoid -N110

- Perform test steps 2 and 13

Solenoid valve 6 -N93

- Perform test step 11

Brake light switch -F

- Perform test step 3

Solenoid valve 7 -N94

- Perform test step 12

Supply voltage for cruise control system

- Perform test step 4

Kick-down switch -F8

- Perform test step 14

Multi-function switch -F125

- Perform test step 5

Road speed sender -G68

- Perform test step 15

Solenoid valve 1 -N88

- Perform test step 6

Screening for -G68

- Perform test step 16

Solenoid valve 2 -N89

- Perform test step 7

Gearbox speed sender -G38

- Perform test step 17

Solenoid valve 3 -N90

- Perform test step 8

Screening for -G38

- Perform test step 18

Solenoid valve 4 -N91

- Perform test step 9

Gearbox oil temperature sender -G93 (ATF)

- Perform test step 19

Test table > < Test table