Jetta III L4-2.0L (ABA) (1995)
Intake Air Temperature Sensor: Testing and Inspection
CHECKING INTAKE AIR TEMPERATURE SENSOR
REQUIREMENTS
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Test using VAG 1551 Scan Tool (ST) with closed throttle.
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Engine cold.
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VAG 1551 Scan Tool connected with "Read Measuring Value Block" function selected (display group number 3).
PROCEDURE
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Indicated on display (1 - 4 = display fields)
Read measuring value block 3
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1 2 3 4
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Read Intake Air Temperature (IAT) value in display field 4.
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Temperature value must increase uniformly without interruption.
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Press --> button.
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Press buttons -0- and -6- to select the "End Output" function.
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Press -Q- to confirm input
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If temperature value does not change:
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Pertorm electrical testing. Refer to Diagnostic Charts / VAG 1598 Pin Out Box / Electrical Checks / Test Step 24. See: Powertrain
Management/Computers and Control Systems/Testing and Inspection
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If necessary replace Intake Air Temperature Sensor.