HELP how do you test a cps (cranp postions sensor)
12-03-2010, 06:37 PM
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You can use a resistance meter to measure the resistance of the sensor as it is just a coil of wire.
Expect a reading between 800 and 1800 ohms.
You can then switch the meter to AC voltage and crank the engine.
You should see a voltage of at least 20 volts when disconnected from the ecu.
The only reliable way of checking its operation is when it is connected to the ecu and using an oscilloscope to view the wave form.
Expect a reading between 800 and 1800 ohms.
You can then switch the meter to AC voltage and crank the engine.
You should see a voltage of at least 20 volts when disconnected from the ecu.
The only reliable way of checking its operation is when it is connected to the ecu and using an oscilloscope to view the wave form.
12-03-2010, 06:41 PM
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Sorry, I assumed you were talking about a cossie sensor 
What car is this from ?
EDIT :: I am fooking blind
I dont know the vauxhall ones ... Sorry !!!
What car is this from ?
EDIT :: I am fooking blind
I dont know the vauxhall ones ... Sorry !!!
Last edited by ECU Monitor Enthusiast; 12-03-2010 at 06:43 PM.
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