TT Quattro Coupe L4-1.8L Turbo (AWP) (2001)
Camshaft Position Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Camshaft Position (CMP) Sensor -G40-, Testing
Special tools and equipment
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VAG 1526A
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VAG 1527 B
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VAG 1594A
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VAG 1598/31
The Hall sender indicates the ignition position for Cylinder 1.
If the Hall sender fails to function, the knock control is switched off and the ignition timing is retarded slightly because the signals can no longer be
assigned to the cylinders. In addition the charge pressure of the turbocharger is reduced.
Even without a signal from the Hall sender the engine will continue to run and can also be restarted.
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When a malfunction is detected the engine control module produces one spark per crankshaft revolution for each cylinder.
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The fact that the injection system is one revolution out of phase does not have any noticeable effect on the fuel injection. If this happens, the fuel is
injected upstream of the closed inlet valve instead of while the inlet valve is open. This has only a minor influence on the quality of the air/fuel
mixture.
Checking activation
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Slide back rubber sleeve (if installed) on connector for Hall sender but leave connector plugged in.