Passat Wagon V6-2792cc 2.8L DOHC (1994)
Air Injection Pump Relay: Testing and Inspection
Test Procedures
REQUIREMENTS
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LED Test Light VAG 1527B or Equivalent.
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Digital Volt/Ohm Meter (DVOM).
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Test Connector kit VW 1594 or Equivalent.
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Refer to Tools and Equipment for test equipment specifications
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Oil temperature between 15°C and 85°C.
TEST PROCEDURE
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Remove relay from socket
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Set DVOM to Voltage range.
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Test for voltage at terminals 2 and 6 of the relay socket.
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Must get approx battery voltage.
If not. Check wiring using wiring diagram. Repair as necessary.
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Connect LED tester to terminals 4 and 6.
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Start Engine and let Idle.
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LED will light for approx 5 seconds after engine has idled approx 20 seconds.
If not. Check wiring using wiring diagram or Refer toVAG 1598 Pin Out Box/ Electrical Checks step 33, repair as necessary.
If wiring is "OK" and LED still does not Light replace ECM.
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Reinstall relay and srart engine and let idle.
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After approx. 20. seconds the Air Injection pump must run for approx. 5 seconds.
If not check for power to Air Pump fuse mounted next to the relay.
If fuse has no power replace relay.