Exhaust gas recirculation system
Checking exhaust gas recirculation valve with temperature sensor
Special tools, testers and auxiliary items
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◆ Hand vacuum pump V.A.G 1390
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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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● Vacuum pipes and hose connections free of leaks.
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● Vacuum pipes not blocked/kinked.
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● Engine oil temperature at least 50 °C
Test sequence
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‒ Connect fault reader V.A.G 1551 (V.A.G 1552) and select engine electronics control unit (address word 01); carry out selection at idling:
=> Repair group 01; Self-diagnosis; Connecting fault reader V.A.G 1551 and selecting engine electronics control unit
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