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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 apply 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 in working order.







• If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which 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 scan tool capable of measuring pulse ratio and pulse duration must be used. The sign indicates a positive trigger pulse, TRIG+.





> = greater than; < = less than; ~= 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 page
1

GN/BK

Main relay, 87

In



B+ to 1

<0.5 V



2

BN/BU

Oxygen sensor 2, preheating

Out

Idling speed Engine coolant temperature above 50 °C

2-25

approx. 0.3 V



4

BU/WH

Relay, A/C compressor

Out

Idling speed

A/C ON

4-25

<0.5 V



5

OG

Cruise control B

In



Mode ON/OFF

5-25

0 V

B+



6

RD/WH

Combustion cyl 3+4

In

Idling speed

6-25

15-90 Hz

(LP LO HIp)



7

RD/BU

Trigger 1

Out

Idling speed

7-25

7 Hz

14 ms (-)

(LP HI LOp)



8

VT/WH

Trigger 4

Out

Idling speed

8-25

7 Hz

14 ms (-)

(LP HI LOp)



9

BK/RD

Pedal position sensor 2

In

Pedal released

Pedal fully depressed

Use diagnostic tool

0.355 - 1.010 V

3.945-4.600 V



10

YE

Throttle position sensor 2

In

Throttle closed

Throttle fully open

10-70

3.910- 4.935 V

0.025-1.070 V



11

BN/OG

Manifold absolute pressure sensor

In



11-22

2.1 V at 100 kPa



13

BU/BN

Charge air control valve

Out



13-25

32 Hz

2 % (-)

0.5 ms (-)

(LP HI LOp)



15

WH/BK

Intake air temperature

In



15-22

Approx. 2.4 V at 20 °C



17

YE

Crankshaft position sensor

In

Idling speed





Starter motor cranking

17-18

5-15 V~

approx. 800 Hz

LP HI LO

>2.0 V~



18

BK

Crankshaft position sensor

In

Idling speed





Starter motor cranking

17-18

5-10 V~

approx. 800 Hz

LP HI LO

>2.0 V~



19

WH

P bus -

In/Out



19-25

2-3 V

(LP PHI LO)



22

BK

Sensor ground

Out



22-25

< 0.1 V



23

RD

+30

In



B+ to 23

< 0.5



24

BU/RD

Throttle motor -

Out



48-24

600 Hz

LP HI LO



25

BK

Power ground

In



25- B-

<0.1 V



26

BU

Main relay

Out



10 s after ignition off

26-25

<0.5 V

B+



27

BN/RD

EVAP canister purge valve

Out

Idling speed, warm engine and valve active

27-25

8 Hz

(LP HI LOp)



29

GN/RD

Pedal switch, brake/clutch

In

Automatic, position D

Brake or clutch pedal depressed

29-25

B+

0 V



30

VT

Cruise control C

In



Mode ON/OFF

30-25

0 V

B+



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



34

RD

Oxygen sensor 1

In

Idling speed, warm engine, closed loop active

34-58

0-1 V



35

YE/RD

Charge air absolute pressure sensor

In



35-70

2.1 V (100 kPa)



36

WH

Relay, limp-home solenoid

Out



36-25

B+



37

BN/WH

EVAP shut-off valve

Out



Activate ON

37-25

B+

<0.5 V



38

OG/WH

Knock signal

In



38-25

2.5 V



39

WH/GN

Engine coolant temperature sensor

In



39-22

1.0 V (90 °C)



43

BU/RD

+15

In



Ignition OFF

43-25

B+

< 0.5 V



44

BK/WH

Injector 2

Out

Idling speed

44-25

7 Hz

2.5-4.5 ms (-)

(LP HI LOp)



45

BN/GN

Injector 1

Out

Idling speed

45-25

7 Hz

2.5-4.5 ms (-)

(LP HI LOp)



46

WH/BK

5 V

Out



46-70

5 V



47

BK

Power ground

In



47-B-

<0.1 V



48

GY/RD

Throttle motor +

Out



48-24

600 Hz

LP HI LO



49

VT/WH

Oxygen sensor 1, preheating

Out

Idling speed

49-25

approx 0.3 V



50

GN

Fuel pump relay

Out



Starter motor cranking

50-25

B+

<0.5 V



51

BU/WH

Bypass solenoid

Out

Accelerate the engine and release the accelerator pedal

Acceleration under load

51-25

B+

<0.5 V



52

WH

Cruise control A

In



Mode ON/OFF

52-25

0 V

B+



53

OG/WH

Combustion cyl 1+2

In

Idling speed

53-25

15-90 Hz

(LP LO HIp)



54

RD/BU

Trigger 2

Out

Idling speed

54-25

7 Hz

14 ms (-)

(LP HI LOp)



55

YE/BU

Trigger 3

Out

Idling speed

55-25

7 Hz

14 ms (-)

(LP HI LOp)



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



57

GN

Oxygen sensor 2

In

Idling speed, warm engine, closed loop active

57-58

0-1 V



58

BK

Reference ground, oxygen sensor

In



58-25

<0.1 V



59

OG/WH

Tank pressure sensor, EVAP

In

Filler cap loose and fuel level below sensor

59-22

2.5 V



63

GN/GY

Brake lights

In

Brake pedal depressed

63-25

0 V



B+



64

GY/RD

Vehicle speed

In

Rotate front left wheel 1/2 rps

64-25

15 Hz

50 %

(LP HIp LOp)



65

PK/WH

Mass air flow sensor

In

Idling speed,

Engine warm,

A/C OFF,

electrical consumers turned off

65-25

Approximately 2.1 kHz



66

GN

P bus +

In/Out



66-25

2-3 V

(LP PHI LO)



67

RD/YE

Injector 3

Out

Idling speed

67-25

7 Hz

2.5-4.5 ms (-)

(LP HI LOp)



68

GN/GY

Injector 4

Out

Idling speed

68-25

7 Hz

2.5-4.5 ms (-)

(LP HI LOp)



69

GY/RD

5 V

Out



69-22

5 V



70

GN/RD

Sensor ground

Out



70-25

<0.1 V