Beetle L4-2.0L (AEG) (2000)
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Vehicles with engine code AEG, AVH, AZG, item 3,
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Vehicles with engine code BDC, item 1.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If no malfunctions are detected in the wires and the resistance values are OK:
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Replace Motronic Engine Control Module (ECM) -J220-.
With Manufacturer Scan Tool
Intake Air Temperature Sensor, Checking
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
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VAG 1551/1552 Scan Tool using VAG 1551/3 Adaptor cable
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VAG 1598/22 Test Box
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Fluke 83 multimeter
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VW 1594 Adaptor kit
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Wiring diagram
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Chilling spray (commercially available)
NOTE:
If sensor or connecting wiring is faulty, the Engine Control Module operates with a substitute temperature of 19.5 °C.
Vehicles with engine code AEG; the Intake Air Temperature sensor is a part of the Mass Air Flow sensor G70 and cannot be replaced by itself.
Test sequence
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Connect VAG 1551/1552 Scan Tool. See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble
Codes/Scan Tool Connecting
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Switch ON ignition.
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Press 0 and 1 buttons to select "Engine Electronics" address word 01.
Indicated on display (example only)
06A906018AB Motronic M5.9.2 HS V06 ->
Coding 00000
WSC 00000
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Press -> button.
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press 0 and 8 buttons to select "Read Measuring Value Block" function 08.
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Press Q button to enter input.
Indicated on display
Read measuring value block
Input Display group number XXX
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Press 0, 0 and 4 buttons to select "Display group 4."
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Press Q button to enter input.
Indicated on display (1 to 4 = Display fields)
Read measuring value block 4 ->
1
2
3
4
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Note Intake Air Temperature value in Display field 4.
