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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.

• The presented readings are with the ignition ON unless otherwise stated.

• 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 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 values %(+) and ms(+) indicate the pulse ratio and pulse duration of the signal. A test instrument for measuring pulse ratio and pulse duration must be used. The (+) sign indicates a positive trigger pulse, TRIG+.





Pin No.

Cable colour

Component/function

In/Out

Test conditions

Across

Test reading

See

1

BK

Ground

Out

Ignition ON

1-B-

<0.5 V



2



No connection











3

YE/WH

Steering wheel controls,

ground

-

Ignition ON

3-B-

<0.1 V



4

BK/WH

Rheostat,

ground

-

Ignition ON

4-B-

<0.1 V



5

GN/BU

Outdoor temperature sensor

ground

-

Ignition ON

5-B-

<0.1 V



6



No connection



Temperature sensor, outdoor







7



No connection











8

YE/GY

Battery Voltage

+15

In

Ignition ON

8-B+

<0.5 V



9

WH

Bus (-)

In/Out

Ignition ON

9-1

2.5 V



10

BN

Filament monitor,

front lights

In

Ignition ON



10-1



B+



11

RD/YE

Rheostat +

In

Ignition ON

“Max.” rheostat position.





11-1





0 V











“Min.” rheostat position

11-1

3.5 V



12



No connection











13



No connection











14



No connection











15

RD/WH

Battery Voltage +30

In

Ignition ON

5-B+

<0.5 V



16

GN

Bus +

In/Out

Ignition ON

16-1

2.5 V



17

YE/WH

Horn,

relay

Out

Ignition ON

Horn NOT activated.

17-1

B+



18

BK/YE

Steering wheel controls + (switches)

In

Ignition ON

Press the following buttons:



-











Horn

18-1

0 V











VOL -

18-1

0.7 V











VOL +

18-1

1.2 V











SRC

18-1

1.8 V











SEEK >>

18-1

2.4 V











<< SEEK

18-1

3.0 V











NXT

18-1

3.6 V











Normal position

18-1

4.2 V











ON

18-1

0 V



19

YE/GN

Temperature sensor, outdoor

In

Ignition ON

Temperature readings:















10°C/50°F

19-1

2.49 V











20°C/68°F

19-1

1.72 V











30°C/86°F

19-1

1.43 V



20

RD/BU

Parking heater / auxiliary heater

Out

Activated

20-1

0 V











Not activated

20-1

B+



21

GY/WH

Washer fluid,

level sensor

In

Washer fluid present (closed contact).

21-1

0 V











No washer fluid present (open contact).

21-1

B+



22

BK/GN

Coolant,

level sensor

In

Coolant present (closed contact).

22-1

0 V











No coolant present (open contact).

22-1

B+





> = greater than; < = less than; ~ = alternating current (LP: LOGIC PROBE P = select pulse; p = visible pulse)