Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSAAB1995900 SE, 2D HATCHBACK, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES - 2.3L 4-CYLDIAGNOSTIC TESTINGDTC P0110, P0112 &/OR P0113 - IAT SENSOR CIRCUITDIAGNOSIS & REPAIR PROCEDURE
1995 Saab 900 SE, 2D Hatchback, Standard
Diagnosis & Repair Procedure
1995 Saab 900 SE, 2D Hatchback, StandardSECTION Diagnosis & Repair Procedure
- Connect scan tool to Data Link Connector (DLC). Start engine. Select READ FUNCTIONS. Select INTAKE AIR TEMP. Check that scan tool readout indicates the approximate intake air temperature. If scan tool reading is incorrect, go to next step. If scan tool reading is correct, go to step 5).NOTE: In the event of an internal IAT sensor fault, scan tool will indicate 8°C. Replace IAT sensor and retest system.
- Unplug the 2-pin IAT sensor connector. Measure specified values between indicated IAT sensor connector terminals and battery. See IAT SENSOR CIRCUIT TEST
table. See Fig 2
. If all readings are as specified, go to next step. If all readings are not as specified, go to step 4).IAT SENSOR CIRCUIT TEST
Terminals Approximate Value 1 & Battery (+) 12 Volts 2 & Battery (-) 5 Volts 1 & 2 1.8 Milliamps (mA)
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.