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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 transmission control module.

Points to remember


• Measurements are to be carried out using a Breakout Box (BOB) connected between the control module and its connector.

• A test reading of 12 V is to be regarded as a voltage level, not an absolute value. For instance, in the case of solenoid 1-2/3-4 (S1) (pin 1), solenoid 2-3 (S2) (pin 3) and solenoid lock-up (SL) (pin 19), about 0.7-1.5 V is lost internally in the control module. Readings taken across these pins and ground (pin 35) will then show current battery voltage less 0.7-1.5 V, which is indicated in the table below.

• A test reading of 0 V is to be regarded as a voltage level and not an absolute value. Where the DRIVE signal (pin 11) is concerned, in the worst case about 0.5-1.5 V will be lost internally in the control module. A reading taken across the relevant control module pin and ground (pin 35) will then show less than 1.5 V, which is indicated as 0 V in the table below.

• Test readings should always be used with discrimination. All test readings are approximate.

• 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+.

• All readings are with warm engine/gearbox.

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


Pin

Component/ Function

In/Out

Test conditions

Test reading

Test between

Signal, see

1

Solenoid 1-2/3-4 (S1)

Out

Ignition ON Gear position D Winter position ON Winter position OFF

12 V 0 V

1 35



2

No connection











3

Solenoid 2-3 (S2)

Out

Ignition ON Gear position D Winter position ON Winter position OFF

0 V 12 V

3 35



4

TCS active Signal from TCS showing that TCS is in control V6 only

In

Ignition ON Address TCS and diagnostic menu ACTIVATE and command TCS lamp: TCS lamp ON TCS lamp OFF or When ignition ON synchronous to TCS lamp being on

12 V 0 V 12 V for 3 s

4 17



5

CHECK ENGINE request

Out

Ignition ON NO DTC IN TCM DTC IN TCM

12 V for 1 s 12 V/2 Hz

5 17



6

Indicator lamp, CHECK GEARBOX

Out

Ignition ON Activate with diagnostic tool CHECK GEARBOX ON CHECK GEARBOX OFF or When ignition ON, synchronous to lamp being on

12 V 0 V 12 V for 3 s

6 17



7

WINTER indicator lamp

Out

Ignition ON Activate with diagnostic instrument WINTER LAMP: Winter lamp ON Winter lamp OFF

12 V 0 V

7 17



8

Kickdown switch

In

Ignition ON Accelerator depressed Accelerator not activated

0 V 12 V

8 35



9

Selector lever position sensor, pin A

In

Ignition ON Selector lever P, R, 3, 2 Selector lever N, D, 1

12 V 0 V

9 35



10

Selector lever position sensor, pin B

In

Ignition ON Selector lever R, N, D, 3 Selector lever P, 2, 1

12 V 0 V

10 35



11

Idling speed compensation Drive signal

Out

Ignition ON Selector lever N From N to D, 3, 2, 1 From N to R

0 V 12 V 12 V

11 35



12

Inductive sensor, input shaft speed

In

Idling speed

1.2-1.4 V∼160-200 Hz

12 31



2500 rpm

2.2 V∼500 Hz

13

Engine torque limitation on shifting

Out

Engine idling

6-cyl: Activate with diagnostic tool ENGINE TORQUE LIMITATION

4-cyl. : Activate with diagnostic tool ENGINE TORQUE LIMITATION

100 Hz

4.0 ms (+)

40%%(-) ms

12 V

0V

< 250

13 31



14

No connection











15

TCS throttle position, position signal from TCS control module

In

Ignition ON Address TCS and diagnostic tool menu ACTIVATE Throttle close OFF

1.6 V 122 Hz 13%% (+) 1.1 ms (+)

15 35



Throttle closing ON

8.5-11 V

122 Hz

70-92%% (+)

5.7-7.5 ms (+)

16

Pressure control solenoid (ST) Current supply

Out

Ignition ON

Activate with diagnostic tool

SOLENOID PRESS REG

4.3 V and 0.7 V

16 34



17

Battery voltage (+15 circuit)

In

Ignition ON Ignition OFF

< 0.5 V 12 V

17 B+



18

Battery voltage (+30 circuit)

In

Ignition ON/OFF

< 0.5 V

18 B+



19

Solenoid, Lock-up (SL)

Out

Ignition ON

Activate with diagnostic tool

SOLENOID LOCK-UP

12 V and 0 V

19 35



20

Switch, SPORT

In

Ignition ON

Switch depressed Switch not activated

0 V

12 V

20 35



21

Switch, WINTER

In

Ignition ON

Switch depressed Switch not activated

0 V

12 V

21 35



22

Ground

In

Ignition ON

< 0.1 V

22 B-



23

Data link K

In/Out

Diagnostic tool connected

Diagnostic tool not connected

10 V

0 V

23 35



24

SPORT indicator lamp

Out

Ignition ON

Activate with

diagnostic tool SPORT LAMP:

Sport lamp ON

Sport lamp OFF

12 V

0 V

17 24



25

Throttle position. Position signal from Motronic control module

In

Idling speed

1.2 V

100 Hz

9%% (+)

0.9 ms (+)

25 35



2500 ± 50 rpm

2.0 V

100 Hz

15%% (+)

1.5 ms (+)

Starter motor cranking

0.25-1.0 V

100 Hz

2-8.2%%(+)

0.2-0.82 ms (+)

26

Brake light switch

In

Ignition ON

Brakes applied

Brakes not applied

12 V

0 V

26 35



27

Selector lever position sensor, pin D

In

Ignition ON

Selector lever P, N, 3, 1

Selector lever R, D, 2

12 V 0 V

27 35



28

Selector lever position sensor, pin C

In

Ignition ON

Selector lever D, 3, 2, 1 Selector lever P, R, N

12 V 0 V

28 35



29

Engine speed Connected, but not used

In









30

Inductive sensor, output shaft speed

In

Engine ON

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

1.1 V∼190 Hz

30 31



31

Ground, signal ground for inductive sensor

In

Ignition ON

< 0.1 V

31 B-



32

No connection











33

NTC sensor for transmission fluid temperature

In

Ignition ON20°C50°C80°C

2.3 V 1.7 V 1.0 V

33 35



34

Solenoid, pressure control (ST) Current feedback

In

Ignition ON Activate with diagnostic tool SOLENOID PRESS REG

0.3 V and 0.1 V

34 35



35

Ground

In

Ignition ON

< 0.1 V

35 B-





*) Vehicle speed can be read with the diagnostic tool, command menu "READ FUNCTIONS" and "OUTPUT SPEED".