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Readings, control module connections

Readings, control module connections




Scope

The following pages contain reading and instructions for measuring signal and levels on the EDC 15 control module.

Remember


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

The specified test 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 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.

Test readings in %(+) and ms(+) show the pulse ratio and pulse duration of the signal. A test instrument capable of giving pulse ratio and pulse duration readings must be used. The (+) sign indicates a positive trigger pulse, TRIG+.



>= greater than; <= less than;

Pins without any further comments do not have a pin connection. (LP: LOGIC PROBE P= select pulse; p= visible pulses)







Pin

Colour

Component Function

In Out

Test conditions

Reading

Between X-Y

See

1

BK

Ground

In



B+

3 - 1



2

BK

Ground

In



B+

3 - 2



3

GN/RD

Power supply

In

Activate main relay

B+

3 - 1



30

VT

Brake light, signal

In

Ignition in ON position

Brake pedal depressed

Brake pedal released



B+

0 V

30 - 1



31

BK/GN

Clutch switch, signal

In

Ignition in ON position

Clutch pedal depressed

Clutch pedal released



B+

0 V

31 - 1



35

YE/BU

Data link K

IN/Out



10-11 V

35 - 1



38

BU

Accelerator pedal position sensor, signal

In

Idling speed

Wide open throttle

0.5 V

3.5 V

38 - 1



39

YE/GU

Power supply +15

In

Ignition in ON position

B+

39 - 1



41

RD/WH

Ground, A/C relay

In

Ignition in ON position

A/C relay activated

A/C relay not activated



0 V

B+

41 - 1



45

GN

Cruise control switch in OFF position

In

Ignition key in ON position, cruise control switch in OFF position

B+

45 - 1



49

YE

Accelerator pedal position sensor, ground

In

Ignition in ON position

<0.1 V

49 - 1



57

WH

Accelerator pedal position sensor, power supply

In

Ignition in ON position

5 V

57 - 1



58

BU/GY

Main relay, ground

Out

Ignition in ON position

<0.4 V

58 - 1



60

BN/YE

Control valve, swirl throttle

Out

Ignition in ON position

140 Hz (PWM)

60 - 1



63

GY/BK

Cruise control switch in RES/- position

In

Ignition key in ON position and cruise control switch in RES/- position

B+

63 - 1



64

GY/GN

Cruise control switch in SET/+ position

In

Ignition key in ON position and cruise control in SET/+ position.

B+

64 - 1



65

YE/GN

Brake light switch

In

Ignition in ON position

Brake pedal depressed

Brake pedal released



<0.1 V

B+

65 - 1



68

BK/VT

Speed signal

In

Rotating wheel (FR)

Square wave, frequency linear to speed

68 - 1



69

GY

Idling speed contact

In

Ignition key in ON position and accelerator released (idling speed)

3.7 V

69 - 1



82

GN/RD

Manifold absolute pressure sensor, power supply

Out

Ignition in ON position

5 V

82 - 1



83

BK

Mass air flow sensor, power supply

Out

Ignition in ON position

5 V

83 - 1



84

BK

Intake air temperature sensor

In

Ignition in ON position

0.3-4.7 V

84 - 1



85

BU/RD

Manifold absolute pressure sensor, signal

In

Ignition key in ON position, engine not running

2 V

85 - 1



86

BU

Engine oil temperature sensor

In

Ignition in ON position

0.3-4.7 V

86 - 1



87

YE

Glow duration feed-back, signal

In

Glow active

Glow inactive

0 V

B+

87 - 1



88

GN/WH

Mass air flow sensor, signal

In

Ignition in ON position

1.1 V

88 - 1



89

BU/YE

Coolant temperature sensor, engine management system, signal

In

Ignition in ON position

0.3-4.7 V

89 - 1



90

YE

Crankshaft position sensor, signal

In

Engine input, idling speed

60 Hz/900 rpm (sine wave)

90 - 1



91

RD/WH

Engine speed signal

Out

Engine input, idling speed

60 Hz/900 rpm (square wave)

91 - 1



92

BK

Mass air flow sensor, ground

In

Always

<0.2 V

92 - 1



93

BK

Sensor ground

In



<0.2 V

3 - 93



94

YE/WH

Control of glow function

Out

Glow active

0.2 V

94 - 1



96

GY/WH

Charge air control valve, power supply

Out

Ignition in ON position

140 Hz (PWM)

96 - 1



97

BU/WH

Control valve, exhaust gas recirculation, power supply

Out

Ignition in ON position

140 Hz (PWM)

97 - 1



98

BK

Crankshaft position sensor, ground

Out



<0.2 V

98 - 1



99

WH

P buss -

In/Out

Ignition in ON position

2-3 V

99 - 1



100

GN

P bus +

In/Out

Ignition in ON position

2-3 V

100 - 1



101

BK

Crankshaft position sensor, screen ground

In



<0.2 V

101 - 1



105

GN/YE

Control valve, shut-off signal

Out

When the engine has been turned off and the ignition key turned to OFF position

10 V

105 - 1