The value of the input shaft speed should be equal to the value of the output shaft speed, when multiplied by the reverse gear ratio, while the transaxle is engaged in the reverse gear.For example, if the output speed is 1,000rpm and the reverse gear ratio is 2.480 , then the input speed is 2,480 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 reverse gear ratio, while the transaxle is engaged in reverse 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 & Limp Home | Possible Cause |
DTC Strategy | ● Rationality-high | ● Inspection components related to the REVERSE clutch and L/R brake inside A/T ● In case of incorrect output speed signal(In case of incorrect input speed signal, trouble code related to D/C is displayed, so do not think P0731~6 code "ON" as the external cause) |
Enable Conditions | ● Engine speed >450rpm Output speed >900rpm Shift stage Rev. gear Iinput speed/1st gear ratio - output speed ㅣ ≥200rpm /1st. gear ratio nput speed >0 rpm A/T oil temp sensor voltage <4.5V Voltage of Battery >10V A/T range switch rationality Only one signal Time after shift changing finish >2 secs | |
Threshold Value | ● ㅣinput speed/Rev. gear ratio - output speed ㅣ≥200rpm /rev. gear ratio | |
Diagnostic Time | ● More than 1sec | |
Fail Safe | ● Locked in 3 rd gear.(detecting once, diagnosis out and dectecting 4 times, control relay off) |
