GEAR SHIFT INDICATOR [SKYACTIV-D 1.5]
id0140z5559000
Purpose/Function
• The gear shift indicator, built into the instrument cluster, informs the driver that a gear position or shift up/down operation is 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.
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 5th gear.
Shift-down recommended operation
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― If a shift-down operation is recommended 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 4th gear is recommended.
Shift-up recommended operation
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― If a shift-up operation is recommended 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-up operation to 6th 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
― Selector lever is in N position or R position (ATX)
― Shift lever is in neutral position or reverse position (MTX)
― Until clutch is completely engaged when vehicle is started (MTX)
― Clutch pedal is depressed for 2 s or more while driving (MTX)
• 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.
Fail-safe
• Not applicable
