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Control module connection test values, rain sensor

Control module connection test values, rain sensor




Scope

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

Remember


• Observe the conditions set for testing and use common sense when assessing the results.

• First make sure that the control module is receiving power and that it is grounded.

• Then check all the 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 a test value is incorrect, consult the wiring diagram to trace which leads, connectors and components 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 duration. A test instrument capable of giving pulse ratio and pulse duration readings should be used. The sign indicates a positive trigger pulse, TRIG+.



Control module connection


Pin no.

Component/

function

In/Out

Test conditions

Across

Test value

See

1

Power supply +54

In

Turn Ignition On

1-4

B+





1-B+

<0.5V



2

Wiper motor

In

Windscreen wipers Activated



2-4





B+











Front Wiper Park Switch

2-4

<0.5 V



3

Wiper stalk potentiometer

In

IGNITION OFF

Control module not connected

Low sensitivity

3-4

0.7-1.4 kΩ







IGNITION OFF

Control module not connected

High sensitivity

3-4

0-0.7 kΩ



4

Ground

In

Turn Ignition On

4-B+

B+







4-B-

<0.5 V



5

High speed, wiper stalk switch position 3

In

Turn Ignition On

Wiper stalk switch in position 3

5-4

B+







5-B+

<0.5 V



6

Washer, wiper stalk switch

In

Washer Activated

6-4

B+



7

Low speed

High speed

Out

Wiper stalk switch, auto position

7-4

<0.5 V



8

High speed

Out

Wiper stalk switch, auto position

8-4

<0.5 V



9

No connection





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