Question about 2004 Chevrolet Monte Carlo
Instrument stepper motors need replacing. I suggest replacing all 6 of them. They are soldered it place.
Posted on Dec 14, 2011
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Posted on Jan 02, 2017
Tips for a great answer:
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The Vehicle Speed
Sensor 1 (output shaft rotation sensor) is mounted to the extension case
(from the outside of the case). The sensor outputs a pulse signal which
is transmitted to the TCM where it is converted to vehicle speed.
The transfer clutch
drum is connected directly to the rear wheel driving propeller shaft.
Vehicle speed sensor 1 on the AWD model detects rear-wheel speed.
Speed Sensor 2 provides vehicle road speed information to the ECM. The
ECM uses this data to properly determine ignition and fuel delivery
curves. The sensor consists of a reed switch and magnetic rotor turned
by the speedometer cable.
One rotation of the
magnetic rotor opens and closes the reed switch four times, producing a
digital signal which is converted to vehicle speed by the ECM. The
sensor operates whenever the vehicle is moving with ignition ON. As the
transmission rotates, the speed sensor sends a pulsed on/off signal to
The speedometer uses VSS 2 for it's signal.
Hope this helps (remember to rate this answer).
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