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 |
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Measurements are to be carried out using a Breakout Box (BOB) connected between the control module and its connector.
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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.
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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.
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Test readings should always be used with discrimination. All test readings are approximate.
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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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All test readings are in respect of a warmed-up engine/transmission.
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The specified test readings refer to those obtained with a calibrated Fluke 88/97.
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pin
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Component/ Function
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Input/Output
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Test conditions
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Test reading
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Test between
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Signal, see
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1
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Solenoid 1-2/3-4 (S1)
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Output
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Ignition ON Gear position D Winter position ON Winter position OFF
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12 V 0 V
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1 35
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2
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Not connected
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3
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Solenoid 2-3 (S2)
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Output
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Ignition ON Gear position D Winter position ON Winter position OFF
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0 V 12 V
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3 35
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4
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TCS active Signal from TCS showing that TCS is in control V6 only
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Input
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Ignition ON Address the TCS and diagnostics instrument menu ACTIVATE and command TCS lamp: TCS lamp ON TCS lamp OFF or With ignition ON at the same time as the TCS lamp is on
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12 V 0 V 12 V for 3 s
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4 17
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5
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CHECK ENGINE request
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Output
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Ignition ON NO DTC IN TCM DTC IN TCM
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12 V for 1 s 12 V/2 Hz
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5 17
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6
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Indicator lamp, CHECK GEARBOX
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Output
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Ignition ON Activate with the diagnostics instrument CHECK GEARBOX ON CHECK GEARBOX OFF or With ignition ON at the same time as the lamp is on
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12 V 0 V 12 V for 3 s
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6 17
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7
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WINTER mode indicator lamp
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Output
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Ignition ON Activate with the diagnostics instrument WINTER LAMP: Winter lamp ON Winter lamp OFF
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12 V 0 V
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7 17
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8
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Kickdown switch
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Input
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Ignition ON Accelerator depressed Accelerator not activated
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0 V 12 V
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8 35
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9
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Transmission range sensor, pin A
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Input
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Ignition ON Selector lever P, R, 3, 2 Selector lever N, D, 1
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12 V 0 V
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9 35
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10
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Transmission range sensor, pin B
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Input
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Ignition ON Selector lever R, N, D, 3 Selector lever P, 2, 1
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12 V 0 V
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10 35
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11
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Idling speed compensation Drive signal
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Output
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Ignition ON Selector lever N From N to D, 3, 2, 1 From N to R
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0 V 12 V 12 V
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11 35
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12
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Inductive sensor, input shaft speed
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Input
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Idling speed
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1.2-1.4 V∼160-200 Hz
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12 31
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2500 rpm
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2.2 V∼500 Hz
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13
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Torque limitation when shifting
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Output
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Engine idling
6-cyl: Activate with the diagnostics instrument ENGINE TORQUE LIMITATION 4-cyl : Activate with the diagnostics instrument ENGINE TORQUE LIMITATION |
100 Hz
4.0 ms (+) 40%%(-) ms 12 V 0V < 250 |
13 31
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14
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Not connected
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15
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TCS throttle position, position signal from TCS control module
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Input
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Ignition ON Address TCS and diagnostics instrument menu ACTIVATE throttle closing OFF
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1.6 V 122 Hz 13%% (+) 1.1 ms (+)
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15 35
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Throttle closing ON
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8.5-11 V
122 Hz 70-92%% (+) 5.7-7.5 ms (+) |
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16
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Solenoid, pressure control (ST) Power supply
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Output
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Ignition ON
Activate with the diagnostics instrument SOLENOID PRESS REG |
4.3 V and 0.7 V
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16 34
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17
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Battery voltage +15
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Input
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Ignition ON Ignition OFF
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< 0.5 V 12 V
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17 B+
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18
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Battery voltage +30
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Input
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Ignition ON/OFF
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< 0.5 V
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18 B+
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19
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Solenoid, lock-up (SL)
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Output
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Ignition ON
Activate with the diagnostics instrument SOLENOID LOCK-UP |
12 V and 0 V
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19 35
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20
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Switch, SPORT
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Input
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Ignition ON
Switch depressed Switch not activated |
0 V
12 V |
20 35
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21
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Switch, WINTER
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Input
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Ignition ON
Switch depressed Switch not activated |
0 V
12 V |
21 35
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22
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Ground
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Input
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Ignition ON
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< 0.1 V
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22 B-
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23
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Diagnostics lead K
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Input/Output
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Diagnostics instrument connected
Diagnostics instrument not connected |
10 V
0 V |
23 35
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24
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Indicator lamp, SPORT
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Output
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Ignition ON
Activate with diagnostics instrument SPORT LAMP: Sport lamp ON Sport lamp OFF |
12 V
0 V |
17 24
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25
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Throttle position. Position signal from Motronic control module
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Input
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Idling
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1.2 V
100 Hz 9%% (+) 0.9 ms (+) |
25 35
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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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Brake light switch
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Input
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Ignition ON
Brakes applied Brakes not applied |
12 V
0 V |
26 35
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27
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Transmission range sensor, pin D
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Input
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Ignition ON
Selector lever P, N, 3, 1 Selector lever R, D, 2 |
12 V 0 V
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27 35
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28
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Transmission range sensor, pin C
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Input
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Ignition ON
Selector lever D, 3, 2, 1 Selector lever P, R, N |
12 V 0 V
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28 35
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29
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Engine speed Connected, but not used
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Input
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30
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Inductive sensor, output shaft speed
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Input
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Engine ON
Raise the car, engage 1st gear and run it at 20 km/h *) |
1.1 V∼190 Hz
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30 31
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31
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Ground, signal ground for inductive sensor
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Input
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Ignition ON
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< 0.1 V
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31 B-
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32
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Not connected
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33
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NTC sensor for fluid temperature
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Input
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Ignition ON20°C50°C80°C
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2.3 V 1.7 V 1.0 V
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33 35
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34
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Solenoid, pressure control (ST) Current feedback
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Input
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Ignition ON Activate with diagnostics instrument SOLENOID PRESS REG
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0.3 V and 0.1 V
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34 35
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35
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Ground
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Input
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Ignition ON
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< 0.1 V
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35 B-
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*) A reading of the car's road speed can be obtained with the diagnostics instrument, command menu "READ FUNCTIONS" and "OUTPUT RPM"
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