Test readings, control module connections
| Test readings, control module connections |
| Scope |
The following pages contain values and directions for measuring transmission control module signals and levels.
| Points to remember |
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Observe the test conditions, use your common sense when judging the readings obtained.
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The specified readings are with the ignition in position ON unless stated otherwise.
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First check that the control module is supplied with current and grounded.
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Then check all sensor inputs and signals from other systems.
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Finally, check the control module outputs. Remember that the readings do not indicate whether the actuator is in working order.
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If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which ought to be checked more thoroughly.
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The specified test readings refer to those obtained with a calibrated Fluke 88/97.
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All readings are with warm engine/gearbox.
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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+.
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Pin
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Cable colour
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Component/ Function
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In/Out
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Test conditions
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Test between
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Test reading
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See
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1
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BK/VT
|
Solenoid 1-2/3-4 (S1)
|
Out
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Gear D
Winter mode ON Winter mode OFF |
1-35
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12 V 0 V |
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2
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No connection
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3
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BK/GN
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Solenoid 2-3 (S2)
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Out
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Gear D
Winter mode ON Winter mode OFF |
3-35
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0 V 12 V |
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4
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No connection
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5
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No connection
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6
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BU/BY
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CHECK GEARBOX warning lamp
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Out
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Activate with diagnostic tool
Check Gearbox ON Check Gearbox OFF or With ignition ON and lamp lit |
6-17
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12 V 0 V 12 V for 3 s |
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7
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RD/WH
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WINTER control lamp
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Out
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Activate with diagnostic tool
Winter lamp: Winter lamp ON Winter lamp OFF |
7-17
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12 V 0 V |
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8
|
YE
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Kickdown switch
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In
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Accelerator pedal depressed
Accelerator pedal inactive |
8-35
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0 V
12 V |
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9
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VT/WH
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Selector lever position sensor, pin A
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In
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Selector lever P, R, 3, 2
Selector lever N, D, 1 |
9-35
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12 V
0 V |
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10
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GN
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Selector lever position sensor, pin B
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In
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Selector lever R, N, D, 3
Selector lever P, 2, 1 |
10-35
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12 V
0 V |
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11
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BH/WH
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Idling speed compensation Drive signal
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Out
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Gear lever N
From N to D, 3, 2, 1 From N to R |
11-35
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0 V
12 V 12 V |
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12
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YE/BK
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Inductive sensor, input shaft speed
|
In
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Idling speed
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12-31
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1.2-1.4 V∼
160-200 Hz |
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2500 rpm
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2.2 V∼500 Hz
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13
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OG/WH
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Engine torque limitation on shifting
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Out
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Engine idling
Activate with diagnostic tool: Engine torque limitation |
13-31
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12 V
0V < 250 |
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14
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No connection
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15
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No connection
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16
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WH/GN
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Pressure control solenoid (ST) Current supply
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Out
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Activate with diagnostic tool
Pressure control solenoid |
16-34
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4.3 V
or 0.7 V |
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17
|
YE/GY
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Battery voltage (+15 circuit)
|
In
|
Ignition ON
Ignition OFF |
17-B+
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< 0.5 V
12 V |
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18
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RD/WH
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Battery voltage (+30 circuit)
|
In
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Ignition ON/OFF
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18-B+
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< 0.5 V
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19
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WH/BK
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Solenoid, Lock-up (SL)
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Out
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Activate with diagnostic tool
Lock-Up solenoid |
19-35
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12 V
or 0 V |
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20
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BN/OG
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Switch, SPORT
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In
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Switch depressed
Switch not activated |
20-35
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0 V
12 V |
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21
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BU/YE
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Switch, WINTER
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In
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Switch depressed
Switch not activated |
21-35
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0 V
12 V |
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22
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BK
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Ground
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In
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22-B-
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< 0.1 V
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23
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BU/YE
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Data link K
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In/Out
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Diagnostic tool connected
Diagnostic tool disconnected |
23-35
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10 V
0 V |
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24
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GN/WH
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SPORT indicator lamp
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Out
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Activate with
diagnostic tool Sport lamp: Sport lamp ON Sport lamp OFF |
17-24
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12 V 0 V |
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25
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GN/OG
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Throttle position
position signal from Motronic control module |
In
|
Idling speed
|
25-35
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1.2 V
100 Hz 9% (+) 0.9 ms (+) |
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2500±50 rpm
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2.0 V
100 Hz 15% (+) 1.5 ms (+) |
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Starter motor cranking
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0.25-1.0 V
100 Hz 2-8.2%(+) 0.2-0.82 ms (+) |
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26
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VT
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Brake light switch
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In
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Brakes applied
Brakes not applied |
26-35
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12 V
0 V |
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27
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WH/YE
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Selector lever position sensor, pin D
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In
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Selector lever P, N, 3, 1
Selector lever R, D, 2 |
27-35
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12 V
0 V |
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28
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GY
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Selector lever position sensor, pin C
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In
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Selector lever D, 3, 2, 1
Selector lever P, R, N |
28-35
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12 V
0 V |
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29
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GN/RD
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Engine speed
Connected but not used |
In
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30
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RD/BU
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Inductive sensor, output shaft speed
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In
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Engine ON
Raise the car, engage 1st gear and run it at 20 km/h *) |
30-31
|
1.1 V∼
190 Hz |
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31
|
YE
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Ground, signal ground for inductive sensor
|
In
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31-B-
|
< 0.1 V
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32
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No connection
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33
|
BK/BU
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NTC sensor for transmission fluid temperature
|
In
|
20°C
50°C 80°C |
33-35
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2.3 V
1.7 V 1.0 V |
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34
|
BU
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Pressure control solenoid (ST)
Current feedback |
In
|
Activate with diagnostic tool
Pressure control solenoid |
34-35
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0.3 V
or 0.1 V |
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35
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BK
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Ground
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In
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35-B-
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< 0.1 V
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*) The vehicle speed can be read using the diagnostic tool, menu "Read values" and "Output speed".
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