Passat Wagon L4-1.9L DSL Turbo (AHU) (1997)
Intake Air Temperature Sensor: Testing and Inspection
Special Tools, Testers And Auxiliary Items:
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VAG 1551/1552 Scan Tool with VAG 1551/3 adaptor cable
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VAG 1598/18 Test Box
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Fluke 83 multimeter
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VW 1594 adaptor kit
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Wiring diagram
Test Sequence:
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Connect VAG 1551/1552 Scan Tool
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Start engine and let idle
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Press 0 and 1 buttons to select address word 01 "engine electronics"
Display will appear as shown:
Rapid data transfer HELP
select function XX
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Press 0 and 8 buttons to select Function 08 "Read measuring value block"
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Press Q button to enter input
Display will appear as shown:
Read measuring value block HELP
Input display group number XXX
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Press 0, 0 and 7 buttons to select "display group 7"
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Press Q button to enter input
Display will appear as shown:
Read measuring value block 7 ->
15.4°C 15.9°C 16.7°C
If implausible value appears in display zone 3 or a substitute temperature of 136.8°C is displayed, check Intake Air Temperature sensor and sensor
wiring as follows:
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Press -> button
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Press 0 and 6 buttons to select Function 06 "end data transfer"
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Press Q button to enter input
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Switch OFF ignition
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Disconnect harness connector -1- from Intake Air Temperature sensor -2-
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Measure resistance between sensor terminals
Specification, see diagram
Scale A shows resistance values for temperature range 0 to 50°C