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Intake Manifold Temperature Sensor Circuit
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 154 PID: P105 SPN: 105 FMI: 4/4 LAMP: Yellow SRT: |
Low voltage detected at the intake manifold temperature sensor circuit. |
Possible white smoke. Fan will stay on if controlled by the electronic control module (ECM). No engine protection for intake manifold temperature. |
 Intake Manifold Temperature Sensor Circuit
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Circuit Description
The intake manifold temperature sensor monitors the temperature of the engine intake air for the ECM. The ECM uses the intake manifold temperature signal for the engine protection system, timing, and fueling control.
Component Location
The intake manifold temperature sensor is located on the top half of the intake manifold, at the front.
Shop Talk
The resistance of the sensor varies with the temperature. Compare your reading to this table:
|
Temperature
(°C) |
Temperature
[°F] |
Resistance
(ohms) |
|
0
|
32
|
30k to 36k
|
|
25
|
77
|
9k to 11k
|
|
50
|
122
|
3k to 4k
|
|
75
|
167
|
1350 to 1500
|
|
100
|
212
|
600 to 675
|
Refer to Troubleshooting Fault Code t05-154
Last Modified: 02-Sep-2010
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