The value of the input shaft speed should be equal to the value of the output shaft speed, when multiplied by the 1st gear ratio, while the transaxle is engaged in the 1st gear. For example, if the output speed is 1000 rpm and the 1st gear ratio is 3.73, then the input speed is 3730 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 1st gear ratio, while the transaxle is engaged in 1st 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 1st gear Input speed > (Output speed *1st 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 1st gear Input speed < (Output speed *1st 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, B, L
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Input speed > 300 RPM
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Output speed(NAB) >150RPM & < 6000RPM
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Throttle opening > 15%(Too Low Only)
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Pre-Filtering 1 sec | ||
Diagnostic Time |
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More than 1sec | ||
Fail Safe |
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Locked as 4th gear | ||
Fig 1) 1st gear in D range
