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HOMESERVICE MANUALSSAAB20029-3 SE, 2D CONVERTIBLE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESENSOR RANGE CHARTSENGINE CONTROLS - SENSOR OPERATING RANGE CHARTSINTRODUCTION
2002 Saab 9-3 SE, 2D Convertible, Automatic

Engine Controls - Sensor Operating Range Charts: Introduction

2002 Saab 9-3 SE, 2D Convertible, 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: Unless stated otherwise in test procedure, perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with minimum 10-megohm input impedance.
CRANKSHAFT POSITION SENSOR RESISTANCE

Temperature - °F (°C) Ohms
68 (20) (1) 770-950
(1) Measure resistance between crankshaft position sensor terminals No. 1 and No. 2. See Fig 1 .
Fig 1: Crankshaft Position Sensor, Heated Oxygen Sensor & Mass Air Flow Sensor Connector View
G00072345Courtesy of SAAB-SCANIA OF AMERICA, INC.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE (1)

Temperature - °F (°C) Volts Ohms
-22 (-30) 4.8 20,000-30,000
-14 (-10) 4.5 7000-11,400
68 (20) 3.6 2100-2900
104 (40) 2.7 1000-1300
140 (60) 1.9 565-670
176 (80) 1.2 295-365
194 (90) 1.0 240-260
230 (110) 0.65 140-160
(1) Measure resistance and voltage between sensor terminals.
HEATED OXYGEN SENSOR (HO2S) VOLTAGE (1)

Condition Volts
Lean .1-0.4
Rich 0.6-0.9
(1) Measure voltage between terminals No. 3 and No. 4. Terminals No. 3 and No. 4 are Gold-plated. See Fig 1 .
HEATED OXYGEN SENSOR (HO2S) HEATER RESISTANCE

Backprobe Between Terminals No. Ohms
1-2 (1) 9
(1) Measure resistance at 68°F (20°C). See Fig 1 .
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE (1)

Temperature - °F (°C) Volts Ohms
-22 (-30) 4.5 20,000-30,000
14 (-10) 3.9 7000-11,400
68 (20) 2.4 2100-2900
104 (40) 1.5 1000-1300
140 (60) 0.9 565-670
176 (80) 0.5 295-365
194 (90) 0.4 240-260
(1) On 9-3 and 9-5 (2.3L) models, measure resistance/voltage between intake air temperature sensor terminals "A" and "B". See Fig 3 . On 9-5 (3.0L) models, measure resistance/voltage at between intake air temperature sensor terminals "B" and "D". See Fig 3 .
MASS AIR FLOW FREQUENCY (1)

Air Flow (Grams/Second) Frequency (Hertz)
0 100-300
1 1045
1.5 1312
2 1527
3.5 2012
5 2355
7.5 2788
10 3134
15 3678
20 4095
30 4764
40 5289
50 5730
60 6114
80 6753
100 7286
120 7743
140 8158
(1) Measure frequency at mass air flow sensor terminal No. 1. See Fig 1 .
MANIFOLD ABSOLUTE PRESSURE/CHARGE AIR PRESSURE SENSOR VOLTAGES (1)(2)

Vacuum/Pressure Volts
In. Hg
7.4 0.9
14.8 1.3
29.53 2.1
psi
18.1 2.5
21.8 2.9
25.4 3.3
(1) On 9-3 models, measure voltage between manifold absolute pressure sensor terminals "A" and "D". See Fig 2 . On 9-5 models, measure voltage between manifold absolute pressure sensor terminals "A" and "B". See Fig 2 .

(2) Measure voltage between charge air pressure sensor terminals "A" and "C". See Fig 3 .
Fig 2: Manifold Absolute Pressure Sensor Connector View
G00072338Courtesy of SAAB-SCANIA OF AMERICA, INC.
RENDER: 1.0x

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