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Test readings, control module connections

Test readings, control module connections


Scope

This section contains the readings and instructions for measuring voltage levels on the SID unit.

Remember:


• Note the test conditions and use common sense when assessing the test result.

• First check that the control module has a power supply and is grounded.

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

• Lastly, check the control module outputs. Remember, the readings do not say anything about 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 should be checked more thoroughly.

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

• The test readings show the signal's pulse ratio and pulse width. A test instrument with pulse ratio and pulse width measurement must be used. The sign indicates a positive trigger pulse, TRIG+.



Control module connection

Pin no.

Component/

Function

In/Out

Test conditions

Across

Test reading

See

1

I-bus (1-lead)

In/Out

Ignition ON

1-32

0-5 V

2

I-bus (1-lead)

In/Out

Ignition ON

2-32

0-5 V

3

No connection











4

Parking heater, indication

Out

Ignition ON

4-32



Not activated

∼B+

Activated

<0.5 V

5

No connection











6

No connection











7

No connection











8

No connection











9

No connection











10

No connection











11

No connection











12

No connection











13

Battery voltage +30

In



13-32

B+



14

No connection











15

No connection











16

TCM, downshifting/upshifting

Out

Ignition ON













Hold Gear

16-B-

0.5-1.4V









Shift Gear Up (+)

16-B-

1.4-1.79V









Shift Gear Down (-)

16-B-

2.7-3.5V



17

I-Bus (2-lead) (-)

In/Out

Ignition ON

17-32

2.5 V



18

I-Bus (2-lead)

In/Out

Ignition ON

18-32

2.5 V



19

Horn relay

Out

Ignition ON

Horn NOT activated.

19-32

B+









Horn activated.

19-32

0 V



20

Parking heater / auxiliary heater

Out

Activated

20-32

0 V









Not activated

20-32

B+



21

Ambient temperature sensor

In

Ignition ON

Temperature readings:













10°C/50°F

21-32

∼2.49 V









20°C/68°F

21-32

∼1.72 V









30°C/86°F

21-32

∼1.43 V



22

Outside temperature sensor, ground

-

Ignition ON

22-32

<0.1 V



23

Rheostat

In

Ignition ON

“Max” rheostat position.



23-32



0 V









“Min” rheostat position

23-32

3.5 V



24

Rheostat, ground

-

Ignition ON

24-32

<0.1 V



25

Steering wheel control (switches)

In

Ignition ON

Press the following buttons:



-









Horn

25-32

0 V









Shift Gear Up (+)

25-32

0.7 V









Shift Gear Down (-)

25-32

0.8 V









VOL -

25-32

1.3 V









VOL +

25-32

1.7 V









SRC

25-32

2.1 V









SEEK >>

25-32

2.5 V









<< SEEK

25-32

2.9 V









NXT

25-32

3.3 V









Normal position

25-32

4.0 V



26

Steering wheel control, ground

-

Ignition ON

26-32

<0.1 V



27

Filament monitor, front lamps

In

Ignition ON

OFF



27-32



B+









ON

27-32

0 V



28

Coolant level sensor

In

Coolant present (closed contact).

28-32

0 V









No coolant present (open contact).

28-32

B+



29

Washer fluid level sensor

In

Washer fluid present (open switch).

29-32

B+









No washer fluid present (closed switch)

29-32

0 V



30

Battery voltage +15

In

Ignition ON

15-32

B+



31

Night panel, switch

In

Ignition ON

31-32

<0.5 V

32

Ground

Out

Ignition ON

32-B-

<0.5 V