Engine Controls - Sensor Operating Range Charts: Introduction

1998 Isuzu Hombre S, 2.2 4, AutomaticSECTION 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 may cause driveability problems.

NOTE: See appropriate TESTS W/CODES articles below, or I - SYSTEM & COMPONENT TESTS article for additional sensor testing procedures.
NOTE: Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE (2.2L HOMBRE)

Temperature °F (°C) Ohms
212 (100) 177
194 (90) 241
158 (70) 467
122 (50) 973
104 (40) 1459
86 (30) 2238
68 (20) 3520
50 (10) 5670
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE (2.2L EXCEPT HOMBRE)

Temperature °F (°C) Ohms
212 (100) 177
176 (80) 332
140 (60) 667
113 (45) 1188
95 (35) 1802
77 (25) 2796
59 (15) 4450
41 (5) 7280
23 (-5) 12300
5 (-15) 21450
-22 (-30) 52700
-40 (-40) 100700
ENGINE COOLANT TEMPERATURE (ECT) & INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE (3.2L & 3.5L)

Temperature °F (°C) Ohms
-40 (-40) 100,700
-22 (-30) 52,700
5 (-15) 21,450
23 (-5) 12,300
41 (5) 7280
59 (15) 4450
77 (25) 2796
95 (35) 1802
113 (45) 1188
140 (60) 667
176 (80) 332
212 (100) 177
FUEL LEVEL SENSOR SPECIFICATIONS (3.2L & 3.5L)

Position Ohms
"E" 102.5-120.5
1/6 73
1/3 56
1/2 45
2/3 36.75
5/6 30
"F" 17-23.5
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE (2.2L HOMBRE)

Temperature °F (°C) Ohms
212 (100) 177
194 (90) 241
158 (70) 467
122 (50) 973
104 (40) 1459
86 (30) 2238
68 (20) 3520
50 (10) 5670
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE (2.2L EXCEPT HOMBRE)

Temperature Ohms
212°F (100°C) 177
140°F (60°C) 667
95°F (35°C) 1802
77°F (25°C) 2796
41°F (5°C) 7280
23°F (-5°C) 21450
-5°F (-15°C) 52700
OXYGEN SENSOR VOLTAGE (1)

Condition Volts
Lean 0.1
Rich 1.0
(1) Test at normal operating temperature.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.