| Testing exhaust gas recirculation |
| Special tools and workshop equipment required |
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| Vehicle system tester -V.A.G 1552 - |
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| Diagnostic cable -V.A.G 1551/3, 3A, 3B oder 3C- |
| The exhaust gas recirculation function is checked in function 04 (basic setting). As a result of this procedure the exhaust gas recirculation valve is pulsed every 10 seconds, so that the extreme values for the exhaust gas recirculation (air mass meter) can be read off in measured value block 003 in display field 3. |
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| Connect vehicle system tester -V.A.G 1552-. Start engine and select address word 01 “Engine electronics” → Chapter. |
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| Enter function 04 “basic setting” and select display group number number 003. |
Note | After selecting display group number 003 and confirming with Q, the idling speed is increased by the engine control unit in display field 1 to 1380...1420 rpm. |
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