S15/T15 Sonoma P/U 2WD V6-262 4.3L VIN W CPI (1994)
Shift Light: Description and Operation
Manual Transmission Shift Light Circuit
PURPOSE
The Manual Transmission Shift Light provides a display which indicates to the driver the optimum fuel economy point for upshifting the manual
transmission based on engine speed and load.
OPERATION
Activation of the control module driver turns the lamp "ON". The Shift Light will stay "ON" for up to 5 seconds, so as to urge the driver to shift-up.
The control module uses information from the following inputs to control the shift light:
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Engine Coolant Temperature (ECT) sensor.
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Throttle Position (TP) sensor.
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Vehicle Speed Sensor (VSS).
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Engine RPM.
The Shift Light will dim slightly when the headlights and/or parking lights are turned "ON". This is to give better driver visibility through the
windshield.
LOCATION
The display lamp is on instrument panel.
