A4 Sedan L4-1.8L Turbo (AEB) (1997)
Camshaft Position Sensor: Testing and Inspection
Camshaft Position (CMP) Sensor -G40-, Checking
Required special tools and test equipment
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VAG 1598/22 test box
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Multimeter US 1119 (Fluke 83 or equivalent)
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VW 1594 connector test kit
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Wiring diagrams
Checking
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Disconnect 3-pin connector from Camshaft Position -G40- sensor.
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Connect multimeter US 1119 (Fluke 83 or equivalent) to measure voltage across CMP connector terminals 1 (B+) and 3 (Ground), using adapter
cables from VW 1594 connector test kit.
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Switch ignition on.
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Measure voltage between terminals 1 and 3.
Specified value: 4.5 volts minimum
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Switch ignition off.
If voltage is OK:
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Connect VAG 1598/22 test box to Motronic ECM harness connector. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial
Checks/Connecting VAG 1598/22 Test Box" See: Testing and Inspection
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Check wiring for open circuit between ECM/test box and 3-pin harness connector, according to wiring diagram.
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Connector terminal 1 to ECM/test box socket 11
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Connector terminal 2 to ECM/test box socket 76
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Connector terminal 3 to ECM/test box socket 67
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Specified value: max. 1.5 Ohms