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
|
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