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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.

• Finally check the control module outputs. Remember that the test readings do not indicate whether the actuator is working.

• 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 connections


Pin No.

Lead colour

Component/

Function

In/Out

Test conditions

Across

Test reading

See

1



No connection











2



No connection











3



No connection











4



No connection











5

RD

Battery Voltage +30

In

Ignition ON

5-B+

<0.5 V



6

BU/WH

Washer fluid level sensor

In

Washer fluid present (open contact).

6-13

B+











No washer fluid present (closed contact)

6-13

0 V



7

OG

External temperature, ground

-

Ignition ON

7-B-

<0.1 V



8

RD/BU

Rheostat, ground

-

Ignition ON

8-B-

<0.1 V



9

YE

Steering wheel control, ground

-

Ignition ON

9-B-

<0.1 V



10



No connection











11

BN/OG

Horn Relay

Out

Ignition ON

Horn NOT activated.

11-13

B+











Horn activated.

11-13

0 V



12

GN

Bus (+)

In/Out

Ignition ON

12-13

2.5 V



13

BK

Ground

Out

Ignition ON

13-B-

<0.5 V



14



No connection











15



No connection











16



No connection











17



No connection











18

GN/WH

Coolant level sensor

In

Coolant present (closed contact).

18-13

0 V











No coolant present (open contact).

18-13

B+



19

BN

Parking heater / auxiliary heater

Out

Activated

19-13

0 V











Not activated

19-13

B+



20

GY

Outside temperature sensor

In

Ignition ON

Temperature readings:















10°C/50°F

20-13

2.49 V











20°C/68°F

20-13

1.72 V











30°C/86°F

20-13

1.43 V



21

RD/WH

Rheostat

In

Ignition ON

“Max.” rheostat position.



21-13



0 V











“Min.” rheostat position

21-13

3.5 V



22

BU

Steering wheel controls (switches)

In

Ignition ON

Press the following buttons:



-











Horn

22-13

0 V











VOL -

22-13

0.7 V











VOL +

22-13

1.2 V











SRC

22-13

1.8 V











SEEK >>

22-13

2.4 V











<< SEEK

22-13

3.0 V











NXT

22-13

3.6 V











Normal position

22-13

4.2 V



23

YE/WH

Filament monitor, front lamps

In

Ignition ON

OFF



23-13



B+











ON

23-13

0 V



24

WH

Bus (-)

In/Out

Ignition ON

24-13

2.5 V



25

RD/BU

Battery Voltage +15

In

Ignition ON

25-B+

<0.5 V