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Old 06-06-2011, 12:46 AM   #1 (permalink)
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I have a 2000 Sonata 2.4 that will not start. The manual states I should have battery voltage on pins 1 to ground and 3 to ground with the key in the start position and the cps connector disconnected from the sensor.

I have 12V on pin 1 to ground 5V on pin 2 to ground and no V on pin 3 to ground. It points to the MFI/ECM relay.

Has anyone ever had this relay go bad or the ECM?
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Old 06-06-2011, 10:55 AM   #2 (permalink)
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The sensor is wired for 12+,, 12-,, and feed back voltage of 5Volt when tested with connector unplugged from sensor.

We have scope function on Hi-Scan and watch square wave pattern & voltage of feed back signal from the sensor.
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Old 06-06-2011, 02:33 PM   #3 (permalink)
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Shouldn't I see the 12v + or - on pins 1 and 3 of the harness to ground with key in start position?
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