SAAB WIS ONLINE

Test readings, control module connections

Test readings, control module connections

Scope

Test readings and directions for measuring signals and levels on the cruise control module are given in the following pages.



Remember:


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

• The test readings presented 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 reading does not tell us whether 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 % (+) 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+.




The pins are identified by both a number and a letter. Note that Pin I does not exist.


Pin Lead colour Component/Function In/Out Test conditions Across Test reading See
1 (A)

GN

Switch A, cruise control

In

Hold the ON/OFF switch in the On position. Ignition switch ON.

1-5

B+



2 (B)

GN/GY

Switch B, cruise control

In

Hold the ON/OFF switch in the On position. Ignition switch ON.

2-5

B+



3 (C)

GY

Switch C, cruise control

In

Hold the ON/OFF switch in the On position. Ignition switch ON.

3-5

B+



4 (D)

YE/GN

Pedal switches









Pedal switch, brakes

In

Automatic transmission, selector lever in D, 1, 2, 3

Pedal released

Pedal depressed

4-5







B+

0 V







Pedal switch, brakes

In

Manual

Pedal released

Pedal depressed

4-5



B+

0 V







Pedal switch. clutch

In

Manual

Pedal released

Pedal depressed

4-5



B+

0 V



5 (E)

BK

Power ground

In

Always

5-B+

5-B-

B+

<0.5 V



6 (F)

BN/WH

Ignition +54

In

Ignition on

6-5

B+-6

B+

<0.5 V



7 (G)

VT

Brake lights switch

In

Pedal depressed

Pedal released

7-5

B+

0 V



8 (H)

BN/GY

CRUISE indicator lamp

Out

Lamp out

Lamp on

8-5

0 V

B+



9 (J)

BU/GN

or BU

Communication with

Trionic/Motronic

Out

Cruise control inactive

Cruise control active

6-9

approx. 10 V

0 V



10 (K)

BK/GN

Vehicle speed signal from the ABS control module

In

LH front wheel spinning

10-5

The multimeter reading should alternate between about 0 V and B+