Checking components
Checking air mass meter
Special tools, testers, measuring instruments and auxiliary items required
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◆ Fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3
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◆ Test box V.A.G 1598/18
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◆ Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
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◆ Adapter set V.A.G 1594
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◆ Current flow diagram
Check conditions
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● The battery voltage must be at least 11.5 V.
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● Coolant temperature at least 85 °C.
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● All electrical consumers, e.g. lights and rear window heating must be switched off
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● If the vehicle is equipped with an air conditioner, this must be switched off.
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● On vehicles with automatic gearbox selector lever in "P" or "N" position
Test sequence
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‒ Connect fault reader V.A.G 1551 (V.A.G 1552). Start engine and select "Address word" 01 of engine control unit. When doing this the engine must be running at idling speed.
(Connecting fault reader and selecting engine control unit
.)
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