PRE-RELEASE
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: |
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Note the test conditions and use common sense when assessing the test result.
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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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Lastly, check the control module outputs. Remember, the readings do not say anything about 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 readings show the signal's pulse ratio and pulse width. A test instrument with pulse ratio and pulse width measurement must be used. The sign indicates a positive trigger pulse, TRIG+.
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| Control module connection |
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Pin no.
|
Component/
Function |
In/Out
|
Test conditions
|
Across
|
Test reading
|
See
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1
|
I-bus (1-lead)
|
In/Out
|
Ignition ON
|
1-32
|
0-5 V
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2
|
I-bus (1-lead)
|
In/Out
|
Ignition ON
|
2-32
|
0-5 V
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3
|
No connection
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4
|
Parking heater, indication
|
Out
|
Ignition ON
|
4-32
|
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Not activated
|
∼B+
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|||||
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Activated
|
<0.5 V
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|||||
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5
|
No connection
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6
|
No connection
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7
|
No connection
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8
|
No connection
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9
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No connection
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10
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No connection
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11
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No connection
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12
|
No connection
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13
|
Battery voltage +30
|
In
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13-32
|
B+
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14
|
No connection
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15
|
No connection
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16
|
TCM, downshifting/upshifting
|
Out
|
Ignition ON
|
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Hold Gear
|
16-B-
|
0.5-1.4V
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Shift Gear Up (+)
|
16-B-
|
1.4-1.79V
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Shift Gear Down (-)
|
16-B-
|
2.7-3.5V
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17
|
I-Bus (2-lead) (-)
|
In/Out
|
Ignition ON
|
17-32
|
2.5 V
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18
|
I-Bus (2-lead)
|
In/Out
|
Ignition ON
|
18-32
|
2.5 V
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19
|
Horn relay
|
Out
|
Ignition ON
Horn NOT activated. |
19-32
|
B+
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Horn activated.
|
19-32
|
0 V
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20
|
Parking heater / auxiliary heater
|
Out
|
Activated
|
20-32
|
0 V
|
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Not activated
|
20-32
|
B+
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21
|
Ambient temperature sensor
|
In
|
Ignition ON
Temperature readings: |
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10°C/50°F
|
21-32
|
∼2.49 V
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20°C/68°F
|
21-32
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∼1.72 V
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30°C/86°F
|
21-32
|
∼1.43 V
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22
|
Outside temperature sensor, ground
|
-
|
Ignition ON
|
22-32
|
<0.1 V
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23
|
Rheostat
|
In
|
Ignition ON
“Max” rheostat position. |
23-32 |
0 V |
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“Min” rheostat position
|
23-32
|
3.5 V
|
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24
|
Rheostat, ground
|
-
|
Ignition ON
|
24-32
|
<0.1 V
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25
|
Steering wheel control (switches)
|
In
|
Ignition ON
Press the following buttons: |
|
-
|
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Horn
|
25-32
|
0 V
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Shift Gear Up (+)
|
25-32
|
0.7 V
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Shift Gear Down (-)
|
25-32
|
0.8 V
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VOL -
|
25-32
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1.3 V
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VOL +
|
25-32
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1.7 V
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SRC
|
25-32
|
2.1 V
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SEEK >>
|
25-32
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2.5 V
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<< SEEK
|
25-32
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2.9 V
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NXT
|
25-32
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3.3 V
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Normal position
|
25-32
|
4.0 V
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26
|
Steering wheel control, ground
|
-
|
Ignition ON
|
26-32
|
<0.1 V
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27
|
Filament monitor, front lamps
|
In
|
Ignition ON
OFF |
27-32 |
B+ |
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ON
|
27-32
|
0 V
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28
|
Coolant level sensor
|
In
|
Coolant present (closed contact).
|
28-32
|
0 V
|
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No coolant present (open contact).
|
28-32
|
B+
|
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29
|
Washer fluid level sensor
|
In
|
Washer fluid present (open switch).
|
29-32
|
B+
|
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No washer fluid present (closed switch)
|
29-32
|
0 V
|
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30
|
Battery voltage +15
|
In
|
Ignition ON
|
15-32
|
B+
|
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|
31
|
Night panel, switch
|
In
|
Ignition ON
|
31-32
|
<0.5 V
|
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|
32
|
Ground
|
Out
|
Ignition ON
|
32-B-
|
<0.5 V
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