A4 Quattro Sedan V6-2.8L (ACK) (1997)
Evaluation of display group 2, display field 4
Checking voltage supply
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Disconnect 3-pin harness connector from Mass Air Flow sensor (MAF).
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Connect multimeter US1119 (Fluke 83 or equivalent) between harness connector terminals 2 (Ground) and 3 (B+), using adapter cables from
VW1594 connector test kit.
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Specified value: 9.0 - 14.5 volts
If there is no voltage:
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Switch ignition off.
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Check wiring using applicable wiring diagram.
Checking wiring
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Switch ignition off.
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Connect VAG 1598/22 test box to ECM harness connector. Refer to "VAG 1598/22 Test Box, Connecting".
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Check wiring for open circuits, between ECM/test box and 3-pin MAF sensor harness connector.
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Connector terminal 1 to ECM/test box socket 13
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Connector terminal 2 to ECM/test box socket 12
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Specified value: max. 1.5 ohms
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Check wiring for short circuits between terminals of 3-pin connector, and between connector and ECM/test box.
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Connector terminal 1 to ECM/test box socket 12
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Specified value: Infinity ohms