B250 3/4 Ton Van V8-318 5.2L VIN T FI (1992)
Intake Air Temperature Sensor: Testing and Inspection
NOTE:
To perform a complete test of Charge Air Temperature sensor and its circuitry, refer to appropriate Diagnostic Chart. To test the sensor only, refer
to the following:
1.
Disconnect the wire harness connector from the Charge Air Temperature sensor.
2.
Test the resistance of the sensor with an input impedance (digital) volt-ohmmeter. The resistance (as measured across the sensor terminals) should
be less than 1000 ohms with the engine warm. Refer to the Coolant Temperature sensor/Charge Air Temperature sensor resistance chart. Replace
the sensor if it is not within the range of resistance specified in the chart.
3.
Test the resistance of the wire harness. Do this between the Engine Controller wire harness connector terminal 21, and the sensor connector
terminal. Also check between terminal 4 to the sensor connector terminal. Repair the wire harness as necessary if the resistance is greater than 1
ohm.
...............................................................................................................................................................................................................................................
TEMPERATURE
RESISTANCE (OHMS)
°C
°F
MIN
MAX
...............................................................................................................................................................................................................................................
-40
-4O
291,490
381,710
-20
-4
85,850
108,390
-10
14
49,250
61,430
0
32
29,330
35,990
10
50
17,990
21,810
20
68
11,370
13,610
25
77
9,120
10,880
30
86
7,370
8,750
40
104
4,900
5,750
50
122
3,330
3,880
60
14O
2,310
2,670
70
158
1,630
1,870
80
176
1,170
1,340
90
194
860
970
100
212
640
720
110
230
480
540
120
248
370
410
...............................................................................................................................................................................................................................................
