GEAR SHIFT INDICATOR [MZR 1.6]
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Purpose/Function
• The gear shift indicator, built into the instrument cluster, informs the driver that a gear position and shift up/down operation are recommended according to the driving conditions.
• The PCM sends a gear shift indicator illumination request to the instrument cluster via CAN communication.
Construction
• The gear shift indicator is built into the instrument cluster. (See
INSTRUMENT CLUSTER.)
Operation
• The PCM compares the target gear speed calculated from each signal and the actual gear speed to determine a gear shift indicator illumination request.
Target gear speed (recommended gear position)
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― The target gear speed is determined by the vehicle speed, accelerator pedal opening angle, ascent rate, altitude, and steering angle.
Actual gear speed (current gear position)
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The actual gear speed is determined by the vehicle speed, engine speed, tire diameter, final gear ratio, and gear engagement.
• The gear shift indicator illumination/off conditions are as follows:
Gear Shift Indicator Illumination Condition
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• There are three gear shift indicator illumination patterns; normal operation, shift-down recommended operation, and shift-up recommended operation.
Normal operation
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― When the following condition is met, the currently selected gear position is indicated.
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• Target gear speed and actual gear speed are equal
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Example: the following figure indicates that the currently selected gear position is 4th gear.
Shift-down recommended operation
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― If a shift-down operation is performed when the following condition is met (determines smooth driveability is difficult), the recommended gear position is indicated at the same time.
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• Target gear speed is lower than actual gear speed
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Example: The following figure indicates that a shift-down operation to 3rd gear is recommended.
Shift-up recommended operation
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― If a shift-down operation is performed when the following condition is met (determines fuel economy worsens), the recommended gear position is indicated at the same time.
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• Target gear speed is higher than actual gear speed
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Example: The following figure indicates that a shift-down operation to 5th gear is recommended.
Gear Shift Indicator Off Condition
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• When any one of the following conditions is met, the gear shift indicator turns off.
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― Vehicle is stopped
― Gear is in neutral position or reverse position
― Until clutch is completely engaged when vehicle is started
― Clutch pedal is depressed for 1.5 s or more while driving
• If the vehicle is driven with the gear not changed when a shift-down/up operation is recommended, the gear shift indicator may temporarily turn off
