Test readings, control module connections
| Test readings, control module connections |
The following pages include values and directions for measuring signals and levels on the main instrument unit and its control module.
| Remember: |
| • |
Note the test conditions and use common sense when assessing the test result.
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| • |
The test readings presented 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 test instrument 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 circuit)
|
In
|
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21-B+
|
< 0.5 V
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2 (K12)
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22
|
BK
|
Ground
|
In
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22-B-
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< 0.5 V
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3 (K12)
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23
|
BK
|
Ground
|
In
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23-B-
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< 0.1 V
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4 (K12)
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24
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No connection
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5 (K12)
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25
|
GN
|
I-bus (+)
|
In/Out
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25-22
|
2.5 V
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6 (K12)
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26
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YE/GY
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Battery Voltage (+15 circuit)
|
In
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26-B+
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< 0.5 V
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7 (K12)
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27
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RD
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Battery Voltage (+30 circuit)
|
In
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27-B+
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< 0.5 V
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8 (K12)
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28
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YE/WH
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Ground, Sensor ground, fuel level sensor
|
Out
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28-B-
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< 0.1 V
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9 (K12)
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29
|
GY/WH
|
Sensor, fuel level
|
In
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29-28
|
0.5-3.7 V
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10 (K12)
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30
|
OG/WH
|
Wheel speed, Rear left
|
In
|
Rotate wheel slowly
|
30-32
|
0 V B+
(LP HI LOp) |
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Rotate wheel 1/2 revolution per second
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30-22
|
15 Hz 50%
(LP HI LOp) |
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11 (K12)
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31
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No connection
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12 (K12)
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32
|
WH
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I-Bus (-)
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32-22
|
2.5 V
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> = 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
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|
Across
|
Test reading
|
See
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1 (K20)
|
1
|
BU
|
Warning lamp, AIRBAG
|
In
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On
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1-B-
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0 V
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Out
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1-B-
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B+
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|||||||
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2 (K20)
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2
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YE
|
Engine oil pressure warning lamp
|
In
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On
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2-B-
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0 V
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Out
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2-B-
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B+
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|||||||
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3 (K20)
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3
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BK/GN
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Warning lamp, charging
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In
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On
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3-B-
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0 V
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Out
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3-B-
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B+
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|||||||
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4 (K20)
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4
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No connection
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5 (K20)
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5
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No connection
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6 (K20)
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6
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BU/GY
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CHECK
GEARBOX |
In
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On
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6-B-
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0 V
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Out
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6-B-
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B+
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|||||||
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7 (K20)
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7
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BU/YE
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SHIFT UP
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In
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On
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7-B-
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0 V
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Out
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7-B-
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B+
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|||||||
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8 (K20)
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8
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YE/GN
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CHECK
ENGINE |
In
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On
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8-B-
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0 V
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Out
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8-B-
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B+
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|||||||
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9 (K20)
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9
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GY/RD
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Lights-on indicator lamp
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In
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On
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9-B-
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B+
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Out
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9-B-
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0 V
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|||||||
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10 (K20)
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10
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GY/GN
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ABS warning lamp
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In
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On
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10-B-
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0 V
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Out
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10-B-
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B+
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|||||||
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11 (K20)
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11
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RD/BK
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Warning lamp, handbrake
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In
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On
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11-B-
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0 V
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Out
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11-B-
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B+
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|||||||
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12 (K20)
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12
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BN/WH
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Warning lamp, brake fluid level
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In
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On
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12-B-
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0 V
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Out
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12-B-
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B+
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|||||||
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13 (K20)
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13
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No connection
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14 (K20)
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14
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No connection
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15 (K20)
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15
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GY
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Main beam indicator lamp
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In
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On
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15-B-
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B+
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Out
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15-B-
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0 V
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|||||||
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16 (K20)
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16
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No connection
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17 (K20)
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17
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No connection
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18 (K20)
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18
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RD/WH
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WINTER
|
In
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On
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18-B-
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0 V
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Out
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18-B-
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B+
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|||||||
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19 (K20)
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19
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GN/WH
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SPORT
|
In
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On
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19-B-
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0 V
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Out
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19-B-
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B+
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|||||||
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20 (K20)
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20
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No connection
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> = greater than; < = less than; ~ = alternating current (LP: LOGIC PROBE P = select pulse; p = visible pulse)
| K22 |
|
Pin
|
Pin BOB
|
Lead colour
|
Component/Function
|
In/Out
|
Test conditions
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Across
|
Test reading
|
See
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1 (K22)
|
33
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No connection
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2 (K22)
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34
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VT/WH
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Selector lever position sensor A
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In
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P, R, 3, 2
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2-B-
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B+
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P, 2, 1
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2-B-
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0 V
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||||||
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3 (K22)
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35
|
GN
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Selector lever position sensor B
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In
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P, R, 3, 2
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3-B-
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B+
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P, 2, 1
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3-B-
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0 V
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||||||
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4 (K22)
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36
|
GY
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Selector lever position sensor C
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In
|
P, R, 3, 2
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4-B-
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B+
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P, 2, 1
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4-B-
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0 V
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||||||
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5 (K22)
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37
|
WH/YE
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Selector lever position sensor PA
|
In
|
P, R, 3, 2
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5-B-
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B+
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P, 2, 1
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5-B-
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0 V
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||||||
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6 (K22)
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38
|
BK
|
Turbo pressure ground
|
Out
|
Ignition ON
|
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38-B-
|
<0.1 V
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7 (K22)
|
39
|
YE/GY
|
Coolant temperature ground
|
Out
|
Ignition ON
|
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39-B-
|
<0.1 V
|
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8 (K22)
|
40
|
RD/WH
|
A/C relay
|
In
|
Engine idling A/C ON
|
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40-B-
|
0 V
|
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A/C OFF
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40-22
|
B+
|
||||||
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9 (K22)
|
41
|
GN/GY
|
A/C out
|
Out
|
Engine idling A/C ON
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41-22
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approx. 10 V
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A/C OFF
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41-22
|
approx. 1 V
|
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10 (K22)
|
42
|
GN/BK
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Idle speed compensation signal
|
Out
|
Fan ON
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42-B-
|
0 V
|
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Fan OFF
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B+
|
|||||||
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11 (K22)
|
43
|
GN
|
Fuel contents signal
|
In
|
Idling
|
|
43-B-
|
7.5 Hz
2-4 ms (-) (HI LOp) |
|
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12 (K22)
|
44
|
GN/RD
|
Engine speed signal
|
In
|
900±50 rpm
|
44-B-
|
30 Hz
(LP LO HI) |
|
|
|
13 (K22)
|
45
|
YE
|
Low fuel level (OBDII)
|
Out
|
More than 10 litres in tank (fuel reserve indicator lamp out)
|
45-22
|
approx. B+
|
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Less than 10 litres in tank (fuel reserve indicator lamp on)
|
45-22
|
0 V
|
|||||||
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14 (K22)
|
46
|
PK
|
Turbo pressure signal
|
In
|
Idling
|
|
46-22
|
approx. 0.5 V
|
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46-22
|
approx. 1.0 V
|
||||||
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15 (K22)
|
47
|
YE/BN
|
Coolant temperature
|
In
|
Temp 20°C
Temp 80°C Temp 100°C |
|
47-22
|
3.8 V
1.5 V 1.0 V |
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16 (K22)
|
48
|
YE/BU
|
Data link K
|
In/Out
|
|
48-22
|
0
|
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With Tech 2 communication
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48-22
|
B+
|
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|||||
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17 (K22)
|
49
|
BN/GY
|
Cruise indicator lamp
|
In
|
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On
|
49-22
|
B+
|
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Out
|
49-22
|
0 V
|
|||||||
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18 (K22)
|
50
|
YE/GY
|
Tank venting diagnosis, signal (SID message)
|
In
|
Tank venting OK
|
50-22
|
B+
|
|
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Tank venting not OK
|
50-22
|
0 V
|
|||||||
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19 (K22)
|
51
|
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No connection
|
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20 (K22)
|
52
|
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No connection
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21 (K22)
|
53
|
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No connection
|
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22 (K22)
|
54
|
GY/BK
|
Diagnostics communication MIU/engine management system
|
In/Out
|
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22-B-
|
B+
|
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|
With Tech 2 communication
|
|
22-B-
|
approx. 10 V
|
> = greater than; < = less than; ~ = alternating current (LP: LOGIC PROBE P = select pulse; p = visible pulse)
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