SAAB WIS ONLINE

Measured values, ECM connections

Measured values, ECM connections

Points to remember:


• The measurements must be performed using a Breakout Box (BOB) connected between the ECM and the ECM's connector.

• Several voltage levels must be regarded as guide values. Use common sense in assessing whether a measured value is correct or incorrect.

• If any measured value is incorrect, use the electrical diagram to establish wheich leads, connectors or components should be checked more closely.

• All the measured values apply to a warmed-up engine.

• Unless otherwise stated, the ignition must be switched on

• Indicated measured values relate to calibrated FLUKE 88/97


> = greater than ; < = less than ; » = approximately equal to; ∼ = AC voltage

Pins without further comments are not connected. (LP: LOGIC PROBE P=select pulse; p=visible pulses).


pins 1- 2

Colour

Component Function

In/Out

Measuring conditions

Between

Measured value

1

PK/WH

+30

in

Idling speed

Batt+ to 1

<0.5 V

2

GN/BK

Boost pressure control valve

out

900±50 rpm

1 - 2

1.3 V

2 - 25

90 Hz 17.5 %% (-) 1.9 ms (-) (LP HI LO)

1000-1500 rpm

1 - 2

» 0 V

2 - 25

90 Hz 2.0 %% (-) 0.2 ms (-) (LP LO)

3

GN/WH

Injector 1

out

900±50 rpm

1 - 3

0.2 V

3 - 25

7.5 Hz 2.5 ms (-) ( LOp)

4

BU/WH

Injector 2

out

900±50 rpm

1 - 4

0.2 V

4 - 25

7.5 Hz 2.5 ms (-) ( LOp)

5

VT/WH

Injector 3

out

900±50 rpm

1 - 5

0.2 V

5 - 25

7.5 Hz 2.5 ms (-) ( I LOp)

6

GY/WH

Injector 4

out

900±50 rpm

1 - 6

0.2 V

6 - 25

7.5 Hz 2.5 ms (-) ( HI LOp)

7

8

9

OG/BK

Trigger 1

out

900±50 rpm

1 - 9

1.2 V

9 - 25

7.5 Hz 8.3 %% (-) 11 ms (-) ( LOp)

10

GN/YE

Trigger 2

out

900±50 rpm

1- 10

1.2 V

10 - 25

7.5 Hz 8.3 %% (-) 11 ms (-) 11 ( LOp)

11

BU/RD

Trigger 3

out

900±50 rpm

1 - 11

1.2 V

11 - 25

7.5 Hz 8.3 %% (-) 11 ms (-) 11 ( LOp)

12

GY/RD

Trigger 4

out

900±50 rpm

1 - 12

1.2 V

12 - 25

7.5 Hz 8.3 %% (-) 11 ms (-) 11 ( LOp)

13

Torque limitation

in

13 - 25

Batt+

Gear-changing

13 - 25

0 V

14

DRIVE

in

P, N

14 - 25

0 V

R, D, 1, 2, 3

14 - 25

Batt+

15

VT

Brake light switch

in

brake pedal not depressed

15 - 25

0 V

brake pedal depressed

15 - 25

Batt+

16

17

YE/BN

Combustion cyl. 1 + 2

in

900±50 rpm

17 - 25

1.5 V 15-30 Hz ( HIp)

18

BN/RD

Combustion cyl. 3 + 4

in

900±50 rpm

18 - 25

1.5 V 15-30 Hz ( HIp)

19

20

PK

Pressure signal

out



20 - 67

1.0 V *)

21

YE/GY

Purge valve Diagnosis

in

ISAT activates purge valve in Trionic (EVAP)

21 - 25

6-7 V 8 Hz 50 %% (-) 60 ms (-) (HIp LOp)

22

BU/BN

Pressure sensor

in



22 - 67

100 kPa= 1.9 V see also technical data

23

GN

Oxygen sensor

in

900±50 rpm and warmed-up engine

23 - 47

0.1-0.9 V

24

BK

Main ground

in

900±50 rpm

24 - Batt-

<0.1 V

25

BK

Main ground

in

900±50 rpm

25 - Batt-

<0.1 V

26

BU

Boost pressure control valve

out

900±50 rpm

1 - 26

0 V

1000-1500 rpm

1 - 26

2.3 V

1000-1500 rpm

1 - 26

90 Hz 17.5 %% (-) 1.9 ms (-) (LP P HI LO)

27

YE/GY

Evaporative emission canister purge valve

out

ISAT activates purge valve in Trionic (EVAP)

21 - 25

6-7 V 8 Hz 50 %% (-) 60 ms (-) (LP HI LO)

28













29













30













31

BU/GY

MAIN RELAY

out

31 - 25

Batt+

ISAT activates IAC valve

32 - 25

0 V

32

YE/GN

CHECK ENGINE

out

32 - 25

<0.5 V

After 3 seconds

32 - 25

Batt+

33

GY/BK

Diagnosis

In/Out

ISAT not connected

33 - 25

» 6.5 V

ISAT connected

33 - 25

Batt+

34

35

YE/BK

Engine load signal AC and all consumers switched off

out

900±50 rpm

35 - 25

» 35 mV 30 Hz » 25 µs (+)

2500 rpm

35 - 25

» 65 mV 83 Hz » 40µs (+) (LP P HI )

36

BU/GN

Cruise control

in

36 - 25

Batt+

Activate diagnostic mode CC, press SET/RES

36 - 25

0 V

37

38

39

PK/BK

Speed signal

in

Rotate front right wheel 1/2 rev/second

39 - 25

5 V **) 15 Hz 50 %% (HIp LOp)

40













41

YE

Crankshaft position sensor

in

900±50 rpm

41 - 67

7-10 V∼ » 870 Hz (LP HI LO)

42

BN/WH

Throttle position sensor

out



42 - 67

5 V

43

GY

Pressure sensor

out



43 - 67

5 V

44

OG

Knocking signal

in

900±50 rpm

44 - 25

50-100 mV∼ (LP P LO)

45

GN/BN

Throttle position sensor

in



45 - 67

idling =0.5 V see also technical data

46

WH/BK

Intake air temperature sensor

in



46 - 67

40°C=1.5 V see also technical data

47

BK

Oxygen sensor, reference ground

in

900±50 rpm

25 - 47

<0.05 V

48

PK/WH

+30



900±50 rpm

Batt+ - 48

<0.5 V

49

BU/VT

Idle air control valve

out

900±50 rpm

1 - 49

3.5 - 5.5 V

AC and all power consumers switched off

49 - 25

500 Hz 25-45 %% 0.5-0.9 ms (LP HI LO)

50

BK/WH

Oxygen sensor, preheating

out

900±50 rpm

50 - 25

» 0.3 V

remove fuse No. 38

50 - 25

0 V

51

52

53

54

RD/WH

AC out

out

ISAT activates AC in Trionic

54 - 25

Batt+/<0.5 V

55

BU/YE

SHIFT UP

out



55 - 25

<0.5 V

56

WH

FUEL PUMP RELAY

out

56 - 25

Batt+



ISAT activates oxygen sensor preheating in Trionic

56 - 25

0 V

57

GN/OG

Throttle position signal

out

900±50 rpm

57 - 25

» 1 V 100 Hz 9 %% (+) 0.9 ms (+) (LP HI LO)

58

GN/RD

Engine speed signal

out

900±50 rpm

58 - 25

» 0.5 V 30 Hz (LP HI )

59

GN/GY

AC in

in

ISAT activates AC in ICE, ON

59 - 25

Batt+

ISAT activates AC in ICE, OFF

59 - 25

0 V

60

YE/GY

+15

in

Batt+ -60

<0.5 V

61













62



Production only









63



Production only









64













65



Production only









66

BK

Reference ground, coolant temperature sensor

in



66 - 25

<0.05 V

67

BK

Sensor ground

out



67 - 25

<0.05 V

68

YE/WH

Engine coolant temperature sensor

in



68 - 66

90°C = 0.41 V see also technical data

69













70















*) slightly lower value may be obtained when measuring at high altitude'

**) with car stationary: 0 V or approx. Batt+'