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Omega Electrical and Audio Help / Re: Code 94 Hall effect switch Voltage high
« on: 06 October 2010, 19:51:16 »
Hope this info help...
Recognition of more than one phase information during one work cycle with correct reference mark on cam (Short circuit to ground)
Above condition must be fulfilled for at least 40 times.
EFFECTS:
Engine load signal is greater than 3 ms and coolant temperature is greater than 38 °C (100 °F):
The control unit retards the spark timing by up to 10.5 °CA for reasons of safety.
(Value varies depending on the engine speed)
The "Hall Sensor" on the camshaft is used for cylinder recognition. It informs the Motronic ECU of the camshaft position when cylinder 1 ignites. The ECU needs this information for accurate fuel injection control and for adaptive knock control. If the Hall sensor malfunctions the ECU attempts to use a random time for injector/spark actuation. This can cause a poor or non-starting engine. If the engine does start with a malfunctioning cam sensor then expect very poor economy.
TEST:
with engine running 2.5v DC (average)
Recognition of more than one phase information during one work cycle with correct reference mark on cam (Short circuit to ground)
Above condition must be fulfilled for at least 40 times.
EFFECTS:
Engine load signal is greater than 3 ms and coolant temperature is greater than 38 °C (100 °F):
The control unit retards the spark timing by up to 10.5 °CA for reasons of safety.
(Value varies depending on the engine speed)
The "Hall Sensor" on the camshaft is used for cylinder recognition. It informs the Motronic ECU of the camshaft position when cylinder 1 ignites. The ECU needs this information for accurate fuel injection control and for adaptive knock control. If the Hall sensor malfunctions the ECU attempts to use a random time for injector/spark actuation. This can cause a poor or non-starting engine. If the engine does start with a malfunctioning cam sensor then expect very poor economy.
TEST:
with engine running 2.5v DC (average)
