Beetle L4-1781cc 1.8L Turbo (APH) (1999)
Intake Air Temperature Sensor: Testing and Inspection
Intake Air Temperature (IAT) Sensor, Checking
With Manufacturer's Scan Tool
Intake Air Temperature Sender, Checking
NOTE: Only gold-plated contacts must be used to repair the contacts in the intake air temperature sender.
Special tools, test equipment and auxiliary items
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Scan tool V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3B
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Test box V.A.G 1598/31
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Hand multimeter V.A.G 1526 or multimeter VAG 1715
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Adapter set V.A.G 1594
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Wiring diagram
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Pliers VAG 1921 for spring type clips
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Chilling spray (commercially available)
Test sequence
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Connect the scan tool V.A.G 1551 (V.A.G 1552). Then switch ignition on and select engine control module with the "Address word" 01.
Connecting scan tool and selecting engine control module. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/VAG 1551 Scan
Tool", See: Computers and Control Systems/Testing and Inspection
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press keys 0 and 8 for the function "Read measuring value block" and confirm entry with Q key.
Indicated on display
Read measuring value block
Input display group number XXX
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Press keys 0, 0 and 4 for "Display group number 4" and confirm entry with Q key.
Indicated on display (1-4 = Display zones)
Read measuring value block 4
->
1
2
3
4
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Read off intake air temperature value in display zone 4.