| Testing Exhaust gas recirculation valve -N18- |
| Special tools and workshop equipment required |
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| Hand multimeter (e.g. -V.A.G 1526 A-) |
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| Adapter cable set (e.g. -V.A.G 1594 C-) |
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| Test box -V.A.G 1598/31- |
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| Voltage tester (e. g. -V.A.G 1527/B -) |
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| Diesel direct injection system relay -J322 - O.K., inspecting → Chapter |
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| Battery voltage at least 11.5 volts |
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| Disconnect plug from the exhaust gas recirculation valve -N18-. |
Note | At ambient temperatures the resistance is at the bottom of the tolerance range, while at operating temperature it is to be found at the top of the tolerance range. |
| If the specified value is not reached: |
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| Replacing Exhaust gas recirculation valve -N18 -. |
| If the specified value is reached: |
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| Connect the voltage tester -V.A.G 1527/B- to the contacts of the exhaust gas recirculation valve -N18-. |
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| Activate exhaust gas recirculation valve -N18 - with final control diagnosis → Chapter. |
| The voltage tester must flash. |
| If the voltage tester does not flash: |
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| Also check the line connections from fuse 24 to the relay for the diesel direct injection system -J322 -. |
| If the lines are not found to be faulty: |
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| Replacing engine control unit -J248- → Chapter. |
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