Test readings, control module connections
| Test readings, control module connections |
| Scope |
This section contains the readings and instructions for measuring voltage levels on the SID unit.
| Remember |
| • |
Note the test conditions and use common sense when assessing the test result.
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| • |
The presented 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 or not the actuator is in working order.
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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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Pin No.
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Lead colour
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Component/function
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In/Out
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Test conditions
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Across
|
Test reading
|
See
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1
|
BK
|
Ground
|
Out
|
Ignition ON
|
1-B-
|
<0.5 V
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2
|
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No connection
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3
|
YE/WH
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Steering wheel controls, ground
|
-
|
Ignition ON
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3-B-
|
<0.1 V
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4
|
BK/WH
|
Rheostat, ground
|
-
|
Ignition ON
|
4-B-
|
<0.1 V
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5
|
BU/GN
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Outdoor temperature sensor, ground
|
-
|
Ignition ON
|
5-B-
|
<0.1 V
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6
|
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No connection
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Temperature sensor, outdoor
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7
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No connection
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8
|
YE/GY
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Battery Voltage (+15 circuit)
|
In
|
Ignition ON
|
8-B+
|
<0.5 V
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9
|
WH
|
Bus (-)
|
In/Out
|
Ignition ON
|
9-1
|
2.5 V
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10
|
BN
|
Filament monitor, front lights
|
In
|
Ignition ON
|
10-1
|
B+
|
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|
11
|
YE/RD
|
Rheostat +
|
In
|
Ignition ON
“Max.” rheostat position. |
11-1
|
0 V
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“Min.” rheostat position
|
11-1
|
3.5 V
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12
|
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No connection
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13
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No connection
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14
|
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No connection
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15
|
RE/WH
|
Battery Voltage +30
|
In
|
Ignition ON
|
5-B+
|
<0.5 V
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16
|
GN
|
Bus +
|
In/Out
|
Ignition ON
|
16-1
|
2.5 V
|
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17
|
YE/WH
|
Horn relay
|
Out
|
Ignition ON
Horn NOT activated. |
17-1
|
B+
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18
|
YE/BK
|
Steering wheel controls + (switches)
|
In
|
Ignition ON
Press the following buttons: |
|
-
|
|
|
|
|
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Horn
|
18-1
|
0 V
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VOL -
|
18-1
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0.7 V
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VOL +
|
18-1
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1.2 V
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SRC
|
18-1
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1.8 V
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SEEK >>
|
18-1
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2.4 V
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<< SEEK
|
18-1
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3.0 V
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NXT
|
18-1
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3.6 V
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Normal position
|
18-1
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4.2 V
|
|
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ON
|
18-1
|
0 V
|
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19
|
YE/GN
|
Temperature sensor, outdoor
|
In
|
Ignition ON
Temperature readings: |
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10°C/50°F
|
19-1
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2.49 V
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20°C/68°F
|
19-1
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1.72 V
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30°C/86°F
|
19-1
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1.43 V
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20
|
BU/RD
|
Parking heater / auxiliary heater
|
Out
|
Activated
|
20-1
|
0 V
|
|
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Not activated
|
20-1
|
B+
|
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21
|
GY/WH
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Washer fluid level sensor
|
In
|
Washer fluid present (closed contact).
|
21-1
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0 V
|
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No washer fluid present (open contact).
|
21-1
|
B+
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22
|
BK/GN
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Coolant level sensor
|
In
|
Coolant present (closed contact).
|
22-1
|
0 V
|
|
|
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No coolant present (open contact).
|
22-1
|
B+
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> = greater than; < = less than; ~ = alternating current (LP: LOGIC PROBE P = select pulse; p = visible pulse)
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