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Test readings, electronic control module connections, Anti-theft alarm

Test readings, electronic control module connections, Anti-theft alarm

Pin

Component/Function

In/Out

Test conditions

Between

Test reading

Function/Fault diag.

1

Antenna,

Remote control unit, transmitter

IN

Not measurable with conventional instruments





29/106

2

LED

OUT

Activate with ISAT scan tool

Select "LED".

"OFF"

"ON"





2-13

2-13





<0.5 V

2 V

27/94

3

Tailgate switch

IN

Tailgate closed

Tailgate open

3-13

3-13

12 V

0 V

18/120

4

Door switches

IN

Door closed

Door open

4-13

4-13

12 V

0 V

18/98

5

Glass breakage sensor, ground

IN

Ignition "OFF"

5-13

<5 Ohm

19/110

6

Central locking system, unlocking

IN

Disarm the alarm with key, front doors

- normal position

- key position, unlock

Multimeter with min/max facility required. If min selected 0 V obtained. A conventional voltmeter drops from about 7 V to about 1.5-3 V.





6-13





12 V

0 V for 0.75 sec

32/98

7

Glass breakage sensor, input

IN

Central locking system unlocking (car key)

7-5

0.3 V

19/110

8

Starter relay, +50 supply

OUT

Starter motor cranking

Ignition "ON" (+15)

13-8

12 V

0 V

25/70

9

Fuel pump relay

OUT

Ignition "ON" (+15)

Alarm armed (when idling)

13-9

12 V

0 V

25/88

10

+15

OUT

Ignition "ON" (+15)

10-13

12 V

21/78

11

Horn

OUT

Activate with ISAT scan tool

Select "HORN".

"OFF"

"ON"





11-13

11-13





12 V

0 V

23/118

12

Direction indicators

OUT

Activate with ISAT scan tool

Select "FLASHERS"

"OFF"

"ON"





12-13 12-13





0 V

12 V

24/114

13

Power ground

IN



13-Batt-

<0.1 V

14/--

14

Antenna ground

IN

Ignition "OFF"

14-13

<5 Ohm

29/106

15

Not used











16

Switch, hood

IN

Bonnet open

Bonnet closed

16-13

0 V

12 V

18/102

17

Central locking system, locking

IN

Arm the alarm from driver's door

- normal position

- key position, lock

Multimeter with min/max facility required. If min selected 0 V obtained. A conventional voltmeter drops from about 7 V to about 1.5-3 V.

17-13



12 V

0 V for 0.75 sec

31/98

18

Pictogram switch

IN

Door open

Door closed

18-13

0 V

12 V

--/128

19

Diagnostics, comm. line

IN/OUT

ISAT scan tool connected

ISAT scan tool not connected

19-13

12 V

0 V

39/64

20

+50

IN

Starter motor cranking

Ignition "ON" (+15)

20-13

12 V

0 V

21/70

21

+15 (4-cyl) +30 (6-cyl)

IN

Ignition "ON" (+15)

Batt+ -21

<0.5 V

21/78

22

+15 (4-cyl) +30 (6-cyl) Voltage supply Trionic/Motronic

OUT

Ignition "ON" (+15)

Batt+ -22

<0.5 V

21/78

23

Unlocking tailgate using remote control

IN

Activate with ISAT scan tool

Select "TAILGATE"

"ON"

"OFF"

or remote control





23-13





12 V

0 V

33/124

24

Direction indicators

OUT

Activate with ISAT scan tool

Select "FLASHERS"

"OFF"

"ON"





24-13 24-13





0 V

12 V

24/114

25

+30

IN



Batt+ -25

<0.5 V

14/84