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Test readings, control module connections

Test readings, control module connections





Scope

The following pages contain specified values and directions for measuring signals and levels on the automatic transmission control module.

Points to remember:


• Observe the test conditions, use your common sense when judging the readings obtained.

• The specified values are with the ignition in position ON unless stated otherwise.

• First check that the control module is supplied with current and grounded.

• Then check all sensor inputs and signals from other systems.

• Finally, check the control module inputs. Remember that the test readings do not indicate whether or not the actuator is in working order.

• If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which ought to be checked more thoroughly.

• The specified test readings refer to those obtained with a calibrated Fluke 88/97.

• Test readings %(+) and ms(+) indicate the signal's pulse ratio and pulse duration. A test instrument capable of measuring pulse ratio and pulse width must be used. The sign denotes a positive trigger pulse, TRIG+.





Pin

Cable colour

Component/ Function

In/Out

Test conditions

Test between

Test reading

See

1

BU/RD

Battery voltage (+15 circuit)

In

Ignition ON

1-B+

< 0.5 V



2

WH/GN

Solenoid, Lock-up (SL)

Out

Ignition ON

Activate with diagnostics instrument

SOLENOID LOCK-UP

2-32

ON=B+

OFF=0 V



3

No connection

4

WH/YE

Solenoid 2-3 (S2)

Out

Ignition ON

Gear D

Winter mode ON

Winter mode OFF

4-32





0 V

B+



5

No connection

6

GN

NTC sensor for transmission fluid temperature

In

Ignition ON

20°C

50°C

80°C

6-32



2.3 V

1.7 V

1.0 V



7

BU

Switch, SPORT

In

Ignition ON

Switch activated

Switch not activated

7-32



0 V

B+



8

No connection

9

GN

Bus+

In/Out

Ignition ON

9-32

approx. 2.5 V



10

WH

Bus-

In/Out

Ignition ON

10-32

approx. 2.5 V



11



No connection

12



No connection

13

BN

Gear selector position sensor, pin A

In

Ignition ON

Selector lever P, R, 3, 2

Selector lever N, D, 1

13-32



B+

0 V



14

OG/WH



Gear selector position sensor, pin C

In

Ignition ON

Selector lever D, 3, 2, 1

Selector lever P, R, N

14-32



B+

0 V



15

GN/RD

Inductive sensor, output speed

In

Raise the car, engage 1st gear and run the engine at 20 km/h*

15-30

0.9 V

140 Hz



16

RD

Battery voltage (+30 circuit)

In

Ignition ON/OFF

16-B+

< 0.5 V



17

WH/YR

Solenoid, pressure control (ST) Power supply

Out

Ignition ON

17-32

5 V

approx. 300 Hz



18

WH/BK

Solenoid, pressure control (ST) Ground

In

Ignition ON

18-32

0.9 V

approx. 300 Hz



19

WH/GN

Solenoid 1-2/3-4 (S1)

Out

Ignition ON

Gear D

Winter mode ON

Winter mode OFF

19-32

B+

0 V



20

No connection

21

No connection

22

GN

Switch, WINTER

In

Ignition ON

Switch activated

Switch not activated

22-32



0 V

B+



23

No connection

24

No connection

25

No connection

26

No connection

27

No connection

28

VT

Gear selector position sensor, pin B

In

Ignition ON

Selector lever R, N, D, 3

Selector lever P, 2, 1

28-32



B+

0 V



29

GY

Gear selector position sensor, pin PA

In

Ignition ON

Selector lever P, N, 3, 1

Selector lever R, D, 2

29-32



B+

0 V



30

PK

Ground, signal ground for inductive sensor

In

Ignition ON

30-B-

< 0.1 V



31

BK

Ground

In

Ignition ON

31-Good ground

< 0.1 V



32

BK

Ground

In

Ignition ON

32-Good ground

< 0.1 V



33



No connection

34

No connection

35

No connection

36

No connection

37

No connection

38



No connection

39

No connection

40

No connection

41

No connection

42

No connection

43

No connection

44

PK

Ground, signal ground for inductive sensor

In

Ignition ON

44-B-

< 0.1 V



45

WH

Inductive sensor, input speed

In

Idling speed

45-44

approx. 1.2 V

170 Hz






*A vehicle speed reading can be obtained with the diagnostics instrument, command menu "Read functions" and "Output speed”.