4.
Accelerate the Engine speed until about 2000 rpm in the 4th gear
Specification : INPUT SPEED - (OUTPUT SPEED × GEAR RATIO) ≤ 200 RPM
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 0.712, then the input speed is 712 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 |
DTC Strategy | ● 4th gear incorrect ratio | ● Faulty Input speed sensor ● Faulty output speed sensor ● Faulty UD clutch or 2nd brake |
Enable Conditions | ● Engine speed >400rpm ● Output speed >900rpm ● Lever position : D ● Input speed >300rpm ● A/T oil temp output ≥ -10℃ ● TRANSAXLE RANGE SWITCH is normaland after 2sec is passed from IG ON | |
Threshold Value | ● ㅣInput speed/4th gear ratio - output speed ㅣ≥200rpm | |
Diagnostic Time | ● More than 1sec | |
Fail Safe | ● Locked into 3 rd gear.(If diagnosis code P0734 is output four times, the transaxle is locked into 3rd gear) |
A : INPUT SPEED SENSOR
B : OUTPUT SPEED SENSOR
※ It is difficult to "STALL TEST" in 4th gear, therefore Go to "W/Harness Inspection" procedure.
Connect scantool to data link connector(DLC)
Engine "ON" .
Monitor the "INPUT & OUTPUT SPEED SENSOR" parameter on the scantool
Accelerate the Engine speed until about 2000 rpm in the 4th gear
Specification : INPUT SPEED - (OUTPUT SPEED × GEAR RATIO) ≤ 200 RPM
Are "INPUT & OUTPUT SPEED SENSOR" within specifications?
 | ▶ Go to "Component Inspection" procedure. |
 | ▶ Check for electrical niose of circuit in INPUT & OUTPUT SPEED SENSOR or Replace INPUT & OUTPUT SPEED SENSOR. Repair as necessary and Go to "Verification Vehicle Repair" procedure . |
Connect Oil pressure guage to "OD" and "2nd" port.
Engine "ON".
Drive a car with gear position "4 "
Compare it with referance data as below
No | MANUAL V/V POSITION | SHIFTING | ELEMENT | PRESSURE(Kgf/cm²) | ||||||||
PCSV-A | PCSV-B | PCSV-C | PCSV-D | ON/OFF | LR | 2-4(2ND) | UD | OD | REV | |||
1 | D | 0 | 100 | 0 | 0 | ON | LR | 10.5±0.2 | 0 | 10.5±0.2 | 0 | 0 |
2 | ↑ | 50 | ↑ | ↑ | ↑ | ↑ | ↑ | 5.7±0.4 | ↑ | ↑ | ↑ | ↑ |
3 | ↑ | 75 | ↑ | ↑ | ↑ | ↑ | ↑ | 0.9±0.3 | ↑ | ↑ | ↑ | ↑ |
4 | ↑ | 100 | ↑ | ↑ | ↑ | ↑ | ↑ | 0 | ↑ | ↑ | ↑ | ↑ |
5 | ↑ | ↑ | 0 | ↑ | 100 | OFF | 2-4(2ND) | 0 | 10.5±0.2 | ↑ | ↑ | ↑ |
6 | ↑ | ↑ | 50 | ↑ | ↑ | ↑ | ↑ | ↑ | 5.7±0.4 | ↑ | ↑ | ↑ |
7 | ↑ | ↑ | 75 | ↑ | ↑ | ↑ | ↑ | ↑ | 0.9±0.3 | ↑ | ↑ | ↑ |
8 | ↑ | ↑ | 100 | ↑ | ↑ | ↑ | ↑ | ↑ | 0 | ↑ | ↑ | ↑ |
9 | ↑ | 0 | ↑ | ↑ | ↑ | ↑ | OD | ↑ | ↑ | ↑ | 10.5±0.2 | ↑ |
10 | ↑ | 50 | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | 5.7±0.4 | ↑ |
11 | ↑ | 75 | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | 0.9±0.3 | ↑ |
12 | ↑ | 100 | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | 0 | ↑ |
13 | ↑ | ↑ | ↑ | 0 | 0 | ↑ | UD | ↑ | ↑ | 10.5±0.2 | ↑ | ↑ |
14 | ↑ | ↑ | ↑ | 50 | ↑ | ↑ | ↑ | ↑ | ↑ | 5.8±0.4 | ↑ | ↑ |
15 | ↑ | ↑ | ↑ | 75 | ↑ | ↑ | ↑ | ↑ | ↑ | 1.0±0.3 | ↑ | ↑ |
16 | ↑ | 0 | ↑ | 100 | ↑ | ↑ | ↑ | ↑ | ↑ | 0 | ↑ | ↑ |
17 | R | ↑ | 0 | ↑ | ↑ | ON | REV | 17.5±0.2 | ↑ | ↑ | ↑ | 17.5±0.2 |
18 | ↑ | ↑ | 50 | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | 8.7±0.6 |
19 | ↑ | ↑ | 75 | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | 0.9±0.5 |
20 | ↑ | ↑ | 100 | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | 0 |
※ The values are subject to change according to vehicle model or conditions
Is oil pressure value within specifications?
| ▶ Repair AUTO TRANSAXLE(Clutch or Brake) as necessary and Go to "Verification Vehicle Repair" Repair " procedure. |
| ▶ Replace AUTO TRANSAXLE (BODY CONTROL VALVE faulty) as necessary and Go to "Verification Vehicle Repair " procedure. |
After a repair, it is essential to verify that the fault has been corrected.
Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode.
Using a scantool, Clear DTC.
Operate the vehicle within DTC Enable conditions in General information.
Are any DTCs present ?
| ▶ Go to the applicable troubleshooting procedure. |
| ▶ System performing to specification at this time. |
