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Test readings, control module connections

Test readings, control module connections



Scope

The following pages contain readings and instructions for measuring signals and levels on the Trionic control module.

Remember:


Note the test conditions and use your common sense when judging the test results.

The specified readings are with the ignition in position 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 in working order.



If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components that ought to be checked more thoroughly.

The test readings given apply to a calibrated Fluke 88/97.

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



>= greater than; <= less than; » = approximately equal to; ∼= alternating current

Pins without comments have no pin connection. (LP: LOGIC PROBE P = select pulse; p = perceptible pulses)

Pin Cable colour Component/function In/Out Test conditions Across Test reading See
1

GN/BK

Main relay

In

B+ to 1

<0.5 V

Main relay

2

BN/BU

Oxygen sensor 2, preheating

Out

Idling Coolant temperature above 50°C

2-25

» 0.3 V

Closed loop

3

Not connected

4

BU/WH

Relay, A/C compressor

Out

700 rpm

A/C ON

4-25

<0.5 V

A/C relay

5

OG

Cruise control B

In

Mode ON/OFF

5-25

0 V

B+

Cruise control

6

GN/RD

Combustion, Bank 2

In

700 rpm

6-25

15-90 Hz

(LP LO HIp)

Ignition discharge modules

7

BU/RD

Trigger 1

Out

700 rpm

7-25

6 Hz

14 ms (-)

(LP HI LOp)

Ignition discharge modules

8

BU/GN

Trigger 4

Out

700 rpm

8-25

6 Hz

14 ms (-)

(LP HI LOp)

Ignition discharge modules

9

GN/YE

Pedal position sensor 2

In

Pedal released

Pedal fully depressed

Use diagnostic tool

0.355-1.010 V

3.945-4.600 V

Pedal position sensor

10

YE

Throttle position sensor 2

In

Throttle closed

Throttle fully open

10-70

3.910-4.935 V

0.025-1.070 V

Throttle control

11

BN/OG

Manifold absolute pressure sensor

In

11-22

2.1 V at 100 kPa

Manifold absolute pressure sensor

12

GY

In

<700 mg/c

Engine temperature -9°C and +30°C

4 - 25

<12 V

Secondary air injection pump relay.

13

Not connected

14

Not connected

15

WH/BK

Intake air temperature

In

15-22

Approx. 2.4 V at 20°C

Intake air temperature sensor

16

Not connected

17

YE

Crankshaft position sensor

In

700 rpm

Starter motor cranking

17-18

5-15 V∼

» 680 Hz

LP HI LO

>2.0 V∼

Crankshaft position sensor

18

BK

Crankshaft position sensor

In

700 rpm

Starter motor cranking

17-18

5-10 V∼

» 680 Hz

LP HI LO

>2.0 V∼

Crankshaft position sensor

19

WH

P-bus -

In/Out



19-25

2-3 V

(LP PHI LO)

Bus communication

20

BK/RD

Injector 6

Out

700 rpm

20-25

6 Hz

(LP HI LOp)

Injectors

21

PK/WH

Injector 5

Out

700 rpm

21-25

6 Hz

(LP HI LOp)

Injectors

22

BK

Sensor ground

Out

22-25

< 0.1 V

Ground

23

RD

+30

In

B+ to 23

< 0.5

Control module power supply

24

BU/RD

Throttle motor

Out

48-24

600 Hz

LP HI LO

Throttle control

25

BK

Power ground

In

25- B-

<0.1 V

Ground

26

BU

Main relay

Out

10 s after ignition OFF

26-25

<0.5 V

B+

Main relay

27

BN/RD

EVAP canister purge valve

Out

700 rpm, engine hot and valve active

27-25

16 Hz

(LP HI LOp)

Purging

28

Not connected

29

GN/RD

Pedal switch, brake/clutch

In

Automatic, position D

Brake or clutch pedal depressed

29-25

B+

0 V

Pedal position sensor

30

VT

Cruise control C

In

Mode ON/OFF

30-25

0 V

B+

Cruise control

31

RD/WH

Trigger 5

Out

700 rpm

31-25

6 Hz

14 ms (-)

(LP HI LOp)

Ignition discharge modules

32

BU/YE

Trigger 6

Out

700 rpm

32-25

6 Hz

14 ms (-)

(LP HI LOp)

Ignition discharge modules

33

GY/RD

Throttle position sensor 1

In

Throttle closed

Throttle fully open

33-70

0.065-1.090 V

3.930-4.775 V

Throttle control

34

RD

Oxygen sensor 1

In

700 rpm, hot engine, closed loop active

34-58

0-1 V

Closed loop

35

YE/RD

Charge air absolute pressure sensor

In

35-70

2.1 V (100 kPa)

Charge air absolute pressure sensor

36

WH

Relay, limp-home solenoid

Out

36-25

B+

37

BN/WH

EVAP canister shut-off valve

Out

Activate ON

37-25

B+

<0.5 V

Purging

38

OG/WH

Knock signal, Bank 1

In

38-25

2.5 V

Knock control

39

WH/GN

Temperature sensor, coolant

In

39-22

1.0 V (90°C)

Temperature sensor, coolant

40

Not connected

41

Not connected

42

Not connected

43

BU/RD

+15

In

Ignition OFF

43-25

B+

< 0.5 V

Control module power supply

44

BK/WH

Injector 2

Out

700 rpm

44-25

6 Hz

(LP HI LOp)

Injectors

45

BU/GN

Injector 1

Out

700 rpm

45-25

6 Hz

(LP HI LOp)

Injectors

46

WH/BK

5 V

Out

46-70

5 V

5V supply

47

BK

Power ground

In

47-B-

<0.1 V

Ground

48

GY/RD

Throttle motor +

Out

48-24

600 Hz

LP HI LO

Throttle control

49

VT/WH

Oxygen sensor, preheating

Out

700 rpm

49-25

» 0.3 V

Closed loop

50

GN

Fuel pump relay

Out

Starter motor cranking

50-25

B+

<0.5 V

Fuel pump relay

51

Not connected

52

WH

Cruise control A

In

Mode ON/OFF

52-25

0 V

B+

Cruise control

53

YE/BU

Combustion, Bank 1

In

700 rpm

53-25

15-90 Hz

(LP LO HIp)

Ignition discharge modules

54

YE/BK

Trigger 2

Out

700 rpm

54-25

6 Hz

14 ms (-)

(LP HI LOp)

Ignition discharge modules

55

RD/BU

Trigger 3

Out

700 rpm

55-25

6 Hz

14 ms (-)

(LP HI LOp)

Ignition discharge modules

56

WH/GN

Pedal position sensor 1

In

Pedal released

Pedal fully depressed

56-70

3.990-4.645 V

0.400-1.055 V

Pedal position sensor

57

GN

Oxygen sensor 2

In

Idling, warm engine, closed loop active

57-58

0-1 V

Closed loop

58

BK

Reference ground, oxygen sensor

In

58-25

<0.1 V

Ground

59

OG/WH

Tank pressure sensor, EVAP

In

Filler cap released and fuel level below sensor

59-22

2.5 V

Purging

60

Not connected

61

Not connected

62

GN/BK

Knock signal, Bank 2

In

62-25

2.5 V

Knock control

63

GN/GY

Brake lights

In

Brake pedal depressed

63-25

0 V

B+

Cruise control

64

GY/RD

Vehicle speed

In

Rotate right front wheel 1/2 turn/s

64-25

15 Hz

50 %

(LP HIp LOp)

Speed, wire from ABS

65

PK/WH

Mass air flow sensor

In

700 rpm

Engine warm

A/C OFF

electrical equipment turned off

65-25

Approx. 2.1 kHz

Mass air flow sensor

66

GN

P-bus+

In/Out

66-25

2-3 V

(LP PHI LO)

Bus communication

67

RD/YE

Injector 3

Out

700 rpm

67-25

6 Hz

(LP HI LOp)

Injectors

68

GN/GY

Injector 4

Out

700 rpm

68-25

6 Hz

(LP HI LOp)

Injectors

69

GY/RD

5 V

Out

69-22

5 V

5V supply

70

GN/RD

Sensor ground

Out

70-25

<0.1 V

Ground