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giath
20-11-2011, 02:36 PM
Hi all
I changed rpm sensor and adjusted it, it doesnot clear and when i run the unit automatically ; it runs until the degree and run off and nothing happened then.
thanks any help

gravy258
21-11-2011, 09:48 AM
this is what the green book says for the MPVI processor CODE 7
Operation
The flywheel sensor is a proximity sensor that generates a pulse as
each flywheel tooth passes the sensor. The microprocessor counts
these pulses and performs the math necessary to convert the pulses
into engine rpm. The flywheel sensor FS1 circuit is a digital input to
the microprocessor. FS2 is a device ground. The sensor is not
polarity sensitive.
NOTE: Unlike earlier flywheel sensor applications the
microprocessor can read very small pulses. Adjusting sensor
position by checking the voltage at the flywheel sensor is not
necessary. It is only necessary to confirm that at least 1.0 vac
is present.
Diagnostics
A defective flywheel sensor will usually display as [----]. The sensor
or it’s associated circuit may be open, shorted internally or shorted to
chassis ground.
1. Disconnect the sensor wires and check the ac voltage at the
sensor with the engine running. If a small ac voltage (greater than
1.0 vac) is not present check the sensor adjustment. Shut the unit
off and turn the sensor in until it contacts the flywheel. Back the
sensor out ½ turn and tighten the lock nut. Recheck the sensor
voltage. If voltage is still not present the sensor is defective and
must be replaced.
2. If ac voltage is present, disconnect the flywheel harness at the
microprocessor and disconnect the flywheel sensor. Using a
Fluke meter set for ohms check for shorts to chassis ground on
the FS1 wire. If a short exists examine the wiring harness for
chaffed areas and repair as required.
3. If no shorts to chassis ground exist connect the FS1 wire to the
FS2 wire. Check continuity from FS1 to FS2 at the
microprocessor connector. The circuit should measure less than
1 ohm. If the circuit is open, check the harness using the wiring
diagram for the unit.

giath
21-11-2011, 10:35 AM
Thank you Sir
could you please to provide me wiring diagrams.
e.mail is giath2008@hotmail.com