The value of the input shaft speed should be equal to the value of the output shaft speed, when multiplied by the 4th gear ratio, while the transaxle is engaged in the 4th gear. For example, if the output speed is 1,000 rpm and the 4th gear ratio is 1.000, then the input speed is 1000 rpm.
This code is set if the value of input shaft speed is not equal to the value of the output shaft, when multiplied by the 4th gear ratio, while the transaxle is engaged in 4th gear. This malfunction is mainly caused by mechanical troubles such as control valve sticking or solenoid valve malfuctioning rather than an electrical issue.
Item | Detecting Condition | Possible Cause | |
Case 1 | DTC Strategy |
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Rationality-high |
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Faulty Input Speed Sensor
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Faulty Output Speed Sensor
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Faulty internal parts in transmission |
Threshold Value |
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Proportionality check between input speed and Output speed at 4st gear Input speed > (Output speed *4st Gear Ratio)+200RPM | ||
Case 2 | DTC Strategy |
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Rationality-low | |
Threshold Value |
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Proportionality check between input speed and Output speed at 4st gear Input speed < (Output speed *4st Gear Ratio)-200RPM | ||
Enable Conditions |
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IThe time after the last shift was finished > 1 sec
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Oil temperature > -10℃
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Engine speed > 600RPM
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Position Lever D
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Input speed > 300 RPM
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Output speed(NAB) >750RPM & < 6000RPM
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Pre-Filtering 1 sec | ||
Diagnostic Time |
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More than 1sec | ||
Fail Safe |
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4th gear Limp-Home mode. | ||
Fig 1) 4st gear in D range
