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HOMESERVICE MANUALSISUZU1997OASIS SREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESENSOR RANGE CHARTSENGINE CONTROLS - SENSOR OPERATING RANGE CHARTSINTRODUCTION
1997 Isuzu Oasis S

Engine Controls - Sensor Operating Range Charts: Introduction

1997 Isuzu Oasis SSECTION Introduction

Sensor operating range information can help determine if a sensor is out of calibration. Although an out-of-calibration sensor may not set a trouble code, it may cause driveability problems.

NOTE: Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE TEST (1)

Temperature - °F (°C) Ohms
-4 (-20) 15,000-18,000
68 (20) 2000-3000
176 (80) 300-500
(1) Measure resistance across sensor terminals.
FUEL TANK PRESSURE SENSOR (1)

Absolute Pressure Volts
-2 In. Hg 0.5
Zero In. Hg 2.5
+2 In. Hg 4.5
(1) California emissions.
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE TEST (1)

Temperature - °F (°C) Ohms
-4 (-20) 15,000-18,000
68 (20) 2000-3000
176 (80) 300-500
(1) Measure resistance across sensor terminals.
MAP SENSOR VOLTAGE TEST (1)

Vacuum Applied - In. Hg Volts
0 2.8-3.0
5 2.3-2.5
10 1.8-2.0
15 1.3-1.5
20 0.8-1.0
25 0.3-0.5
(1) Measure voltage at appropriate ECM terminals. See the WIRING DIAGRAMS article in ENGINE PERFORMANCE.
EGR LIFT SENSOR VOLTAGE TEST (1)

Position Volts (Approximate)
Fully Closed 1.2
Fully Open 4.3
(1) Measure voltage at appropriate ECM terminals. See the WIRING DIAGRAMS article in ENGINE PERFORMANCE. Voltage should increase smoothly as vacuum is applied.
OXYGEN SENSOR VOLTAGE TEST (1)

Condition Volts
Lean Less Than 0.3
Rich Greater Than 0.6
(1) Measure voltage between ground and oxygen sensor terminal using a high-impedance DVOM.
THROTTLE POSITION (TP) SENSOR VOLTAGE

Condition Volts
Throttle Valve
Fully Closed 0.5
Wide Open 4.5
VEHICLE SPEED SENSOR (VSS) TEST (1)

Application Voltage
VSS (2)
(1) Backprobe terminals at sensor.
(2) Voltage will fluctuate between zero and 5 volts while rotating drive wheel.
RENDER: 1.0x

NO RELATED

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  • • You are missing required tools, torque specs, or safe lifting equipment.
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