Test readings, control module connections
| Test readings, control module connections |
| Remember |
| • |
Note the test conditions and use common sense when assessing the test result.
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| • |
The specified test readings are with the ignition ON unless otherwise stated.
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| • |
First check that the control module has a power supply and is grounded.
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| • |
Then check all sensor inputs and signals from other systems.
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| • |
Finally, check the control module outputs. Remember that the test readings do not indicate whether the actuator is working.
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| • |
If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which should be checked more thoroughly.
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| • |
The specified test readings refer to those obtained with a calibrated Fluke 88/97.
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| • |
The test values %(+) and ms(+) indicate the pulse ratio and pulse duration of the signal. A scan tool for measuring pulse ratio and pulse duration must be used. The (+) sign indicates a positive trigger pulse, TRIG+.
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| K12 |
|
Pin
|
Pin BOB
|
Lead colour
|
Component/
Function |
In/Out
|
Test conditions
|
Across
|
Test reading
|
See
|
|
1 (K12)
|
21
|
YE/GY
|
Battery Voltage +15
|
In
|
|
21-B+
|
<0.5 V
|
|
|
2 (K12)
|
22
|
BK
|
Ground
|
In
|
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22-B-
|
<0.5 V
|
|
|
3 (K12)
|
23
|
BK
|
Ground
|
In
|
|
23-B-
|
<0.1 V
|
|
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4 (K12)
|
24
|
GN
|
P-bus (+)
|
In/Out
|
|
24-22
|
2.5 V
|
|
|
5 (K12)
|
25
|
GN
|
I-bus (+)
|
In/Out
|
|
25-22
|
2.5 V
|
|
|
6 (K12)
|
26
|
YE/GY
|
Battery Voltage +15
|
In
|
|
26-B+
|
<0.5 V
|
|
|
7 (K12)
|
27
|
RD
|
Battery Voltage +30
|
In
|
|
27-B+
|
<0.5 V
|
|
|
8 (K12)
|
28
|
YE/WH
|
Ground, Sensor ground, fuel level sensor
|
Out
|
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28-B-
|
<0.1 V
|
|
|
9 (K12)
|
29
|
GY/WH
|
Sensor, fuel level
|
In
|
|
29-28
|
0.5-3.7 V
|
|
|
10 (K12)
|
30
|
OG/WH
|
Wheel speed, Rear left
|
In
|
Rotate wheel slowly
|
30-32
|
0 V/B+
(LP Hlp LOp ) |
|
|
Rotate wheel 1/2 revolution per second
|
30-22
|
15 Hz
50% (LP Hlp LOp ) |
|
|||||
|
11 (K12)
|
31
|
WH
|
P-bus (-)
|
|
|
31-22
|
2.5 V
|
|
|
12 (K12)
|
32
|
WH
|
I-bus (-)
|
|
|
32-22
|
2.5 V
|
|
> = greater than; < = less than; ~ = alternating current (LP: LOGIC PROBE P = select pulse; p = visible pulse)
| K20 |
|
Pin
|
Pin BOB
|
Lead colour
|
Component/
Function |
In/Out
|
Test conditions
|
Across
|
Test reading
|
See
|
|
1 (K20)
|
1
|
BU
|
Warning lamp, AIRBAG
|
In
|
On
|
1-B-
|
0 V
|
|
|
Off
|
1-B-
|
B+
|
||||||
|
2 (K20)
|
2
|
YE
|
Engine oil pressure warning lamp
|
In
|
On
|
2-B-
|
0 V
|
|
|
Off
|
2-B-
|
B+
|
||||||
|
3 (K20)
|
3
|
GN/BK
|
Warning lamp, charging
|
In
|
On
|
3-B-
|
0 V
|
|
|
Off
|
3-B-
|
B+
|
||||||
|
4 (K20)
|
4
|
|
No connection
|
|
|
|
|
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5 (K20)
|
5
|
|
No connection
|
|
|
|
|
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6 (K20)
|
6
|
|
No connection
|
|
|
|
|
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7 (K20)
|
7
|
|
No connection
|
|
|
|
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8 (K20)
|
8
|
|
No connection
|
|
|
|
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9 (K20)
|
9
|
GY/RD
|
Lights-on indicator lamp
|
In
|
On
|
9-B-
|
B+
|
|
|
Off
|
9-B-
|
0 V
|
||||||
|
10 (K20)
|
10
|
GN/GY
|
ABS warning lamp
|
In
|
On
|
10-B-
|
0 V
|
|
|
Off
|
10-B-
|
B+
|
||||||
|
11 (K20)
|
11
|
RD/BK
|
Warning lamp, handbrake
|
In
|
On
|
11-B-
|
0 V
|
|
|
Off
|
11-B-
|
B+
|
||||||
|
12 (K20)
|
12
|
BN/WH
|
Warning lamp, brake fluid level
|
In
|
On
|
12-B-
|
0 V
|
|
|
Off
|
12-B-
|
B+
|
||||||
|
13 (K20)
|
13
|
|
No connection
|
|
|
|
|
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14 (K20)
|
14
|
|
No connection
|
|
|
|
|
|
|
15 (K20)
|
15
|
GY
|
Main beam indicator lamp
|
In
|
On
|
15-B-
|
B+
|
|
|
Off
|
15-B-
|
0 V
|
||||||
|
16 (K20)
|
16
|
|
No connection
|
|
|
|
|
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17 (K20)
|
17
|
|
No connection
|
|
|
|
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18 (K20)
|
18
|
|
No connection
|
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19 (K20)
|
19
|
|
No connection
|
|
|
|
|
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20 (K20)
|
20
|
|
No connection
|
|
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> = greater than; < = less than; ~ = alternating current (LP: LOGIC PROBE P = select pulse; p = visible pulse)
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