Engine Control System - Sensor Range Charts: Introduction
Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a trouble code, but it will cause driveability problems.
NOTE:
Unless stated otherwise in test procedure, perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
ECT SENSOR RESISTANCE (3.0L - CATERA)
| Temperature - °F (°C) |
Ohms |
| 284 (140) |
68-74 |
| 248 (120) |
109-116 |
| 212 (100) |
182-191 |
| 176 (80) |
313-332 |
| 140 (60) |
573-618 |
| 104 (40) |
1118-1231 |
| 77 (25) |
1941-2173 |
| 68 (20) |
2351-2649 |
| 32 (0) |
5466-6326 |
| 14 (-10) |
8642-10,152 |
| -4 (-20) |
14,096-16,827 |
| -40 (-40) |
40,490-50,136 |
ECT
& IAT
SENSOR RESISTANCE (1.3L & 1.8L)
| Temperature - °F (°C) |
Ohms |
| 176 (80) |
315 |
| 158 (70) |
435 |
| 140 (60) |
580 |
| 122 (50) |
810 |
| 113 (45) |
940 |
| 104 (40) |
1150 |
| 95 (35) |
1360 |
| 86 (30) |
1600 |
| 77 (25) |
2000 |
| 68 (20) |
2400 |
| 59 (15) |
3000 |
| 50 (10) |
3600 |
| 41 (5) |
4600 |
| 32 (0) |
5700 |
| 23 (-5) |
7400 |
| 14 (-10) |
9800 |
| 5 (-15) |
12,700 |
| -4 (-20) |
16,000 |
ECT
, IAT
& TFT
SENSOR RESISTANCE (EXCEPT 1.3L, 1.8L & 3.0L CATERA)
| Temperature - °F (°C) |
Ohms |
| 212 (100) |
177 |
| 194 (90) |
241 |
| 176 (80) |
332 |
| 158 (70) |
467 |
| 140 (60) |
667 |
| 122 (50) |
973 |
| 113 (45) |
1188 |
| 104 (40) |
1459 |
| 95 (35) |
1802 |
| 86 (30) |
2238 |
| 77 (25) |
2796 |
| 68 (20) |
3520 |
| 59 (15) |
4450 |
| 50 (10) |
5670 |
| 41 (5) |
7280 |
| 32 (0) |
9420 |
| 23 (-5) |
12,300 |
| 14 (-10) |
16,180 |
| 5 (-15) |
21,450 |
| -4 (-20) |
28,680 |
| -22 (-30) |
52,700 |
| -40 (-40) |
100,700 |
IAT SENSOR RESISTANCE (3.0L - CATERA)
| Temperature - °F (°C) |
Ohms |
| 284 (140) |
74-93 |
| 248 (120) |
114-141 |
| 212 (100) |
184-222 |
| 176 (80) |
312-370 |
| 140 (60) |
565-654 |
| 104 (40) |
1096-1238 |
| 77 (25) |
1900-2100 |
| 68 (20) |
2290-2551 |
| 32 (0) |
5119-5892 |
| 14 (-10) |
7943-9307 |
| -4 (-20) |
12,660-15,120 |
| -40 (-40) |
35,140-43,760 |
FUEL LEVEL SENSOR VOLTAGE (5.7L - CORVETTE)
| Fuel Level |
Volts (Left Tank) |
Volts (Right Tank) |
| Full |
2.5 |
2.5 |
| 3/4 |
2.5 |
1.5 |
| Half |
2.5 |
Less Than 1.0 |
| 1/4 |
1.7 |
Less Than 1.0 |
| Empty |
Less Than 1.0 |
Less Than 1.0 |
FUEL PRESSURE SENSOR VOLTAGE (2.2L - CNG)
| psi (kPa) |
Volts |
| 0 (0) |
0.50 |
| 125 (862) |
0.63 |
| 438 (3021) |
0.94 |
| 750 (5172) |
1.25 |
| 1063 (7331) |
1.56 |
| 1375 (9483) |
1.88 |
| 1688 (11,641) |
2.19 |
| 2000 (13,793) |
2.50 |
| 2313 (15,952) |
2.81 |
| 2625 (18,103) |
3.13 |
| 2938 (20,262) |
3.44 |
| 3250 (22,414) |
3.75 |
| 3563 (24,572) |
4.06 |
| 3875 (26,724) |
4.38 |
| 4000 (27,586) |
4.54 |
FUEL TEMPERATURE SENSOR (2.2L - CNG)
| Temperature - °F (°C) |
Ohms |
Volts |
| 302 (150) |
77 |
0.14 |
| 248 (120) |
147 |
0.26 |
| 212 (100) |
240 |
0.40 |
| 176 (80) |
414 |
0.66 |
| 158 (70) |
556 |
0.84 |
| 140 (60) |
758 |
1.08 |
| 122 (50) |
1052 |
1.39 |
| 113 (45) |
1249 |
1.57 |
| 104 (40) |
1489 |
1.76 |
| 95 (35) |
1784 |
1.97 |
| 86 (30) |
2148 |
2.20 |
| 77 (25) |
2600 |
2.43 |
| 68 (20) |
3167 |
2.68 |
| 59 (15) |
3881 |
2.93 |
| 50 (10) |
4764 |
3.18 |
| 41 (5) |
5933 |
3.42 |
| 32 (0) |
7407 |
3.65 |
| 23 (-5) |
9311 |
3.86 |
| -4 (-20) |
19,326 |
4.38 |
| -40 (-40) |
57,536 |
4.77 |
| -58 (-50) |
104,390 |
4.87 |
MAP SENSOR VOLTAGE (1.9L)
| Altitude Feet |
Volts |
| Below 1000 |
3.8-5.5 |
| 1000-2000 |
3.6-5.3 |
| 2000-3000 |
3.5-5.1 |
| 3000-4000 |
3.3-5.0 |
| 4000-5000 |
3.2-4.8 |
| 5000-6000 |
3.0-4.6 |
| 6000-7000 |
2.9-4.5 |
| 7000-8000 |
2.8-4.3 |
| 8000-9000 |
2.6-4.2 |
| 9000-10,000 |
2.5-4.0 |
OXYGEN SENSOR VOLTAGE
| Condition |
Volts |
| Except Metro & Prizm |
| Lean |
0.1 |
| Rich |
1.0 |
| Metro & Prizm |
| Lean |
0.1 |
| Rich |
0.9 |