Engine Controls - Sensor Operating Range Charts: Introduction

1996 Saab 9000 CS, StandardSECTION 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)
Motronic System 770-950
Trionic System 485-595
COOLANT TEMPERATURE (CTS) SENSOR RESISTANCE (1)

Temperature - °F (°C) Ohms
Motronic System
-22 (-30) 20,000-30,000
68 (20) 8300-10,600
104 (40) 2300-2700
140 (60) 565-670
176 (80) 295-365
194 (90) 200-240
230 (110) 140-160
Trionic System
-22 (-30) 20,000-30,000
-14 (-10) 7000-11,400
68 (20) 2100-2900
104 (40) 1000-1300
140 (60) 565-670
176 (80) 295-365
194 (90) 240-260
230 (110) 140-160
(1) Measure resistance between sensor terminals.
INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE (1)

Temperature - °F (°C) Ohms
Motronic 5.2 System
-22 (-30) 20,000-30,000
14 (-10) 8300-10,600
68 (20) 2300-2700
104 (40) 1000-1300
140 (60) 565-670
176 (80) 295-365
194 (90) 240-260
Trionic System
-22 (-30) 20,000-30,000
14 (-10) 7000-11,400
68 (20) 2100-2900
104 (40) 1000-1300
140 (60) 565-670
176 (80) 295-365
194 (90) 240-260
(1) Measure voltage between sensor terminals.
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR VOLTAGE (TRIONIC SYSTEM) (1)

Pressure - kPa Volts
.25 .48
50 .95
100 1.9
125 2.4
150 2.8
175 3.3
(1) Measure voltage between terminals No. 1 and No. 2.
HEATED OXYGEN SENSOR (HO2S) VOLTAGE

Condition Volts
Lean 0-0.4
Rich 0.6-1.0
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.