P0757

DTC P0757 Shift Solenoid B Performance (Stuck On)





Circuit Description
The shift solenoid B is used to control fluid flow acting on the 2-3 shift valves. The solenoid is a normally open exhaust valve that is used with the shift solenoid A to allow four different shifting combinations.
The DTC detects when there is only a 1-2-2-1 shift pattern depending on the state of the mechanical failure instead of a 1-2-3-4 shift pattern. This is a type B DTC.

Conditions For Setting The DTC
- No ETC DTCs.
- No OSS DTCs P0722 or P0723.
- No TCC solenoid DTC P0742, P1860, P1870.
- No shift solenoid DTC P0753.
- No shift solenoid B DTC P0758.
- Gear range is D4.
- Transmission temperature is between 20° and 130°C (68 ° and 266°F).
- Output speed is greater than 375 rpm.
- No range code P0705, P0706.
- No torque code (to be confirmed)
- Engine run for more than 0 seconds and not include cut-off (to be confirmed).

All the above conditions have been met and the combination of conditions 1, 2 occur two consecutive times.

Condition 1:
- 1st gear is commanded for >/= 1 second.
- 40 - Speed ratio >/= 0.6
- Throttle position >/= 10%
- -8000 - Transmission out speed >/= 375 rpm
- Speed ratio >/= 0.6
- 1.44
Condition 2:
- 4th gear is commanded for >/= 1 second.
- 15 - Throttle position >/= 10%
- -8000 - Speed ratio >/= 0.6
- 2.75
Action Taken When the DTC Sets
- Maximum line pressure.
- For lamp illuminate refer to Type B - Types Of Diagnostic Trouble Codes (DTCs)
- Turn Force Motor OFF.

Conditions For Clearing The The MIL/DTC
- The PCM will turn off the MIL and CHECK TRANS Lamp after three consecutive ignition cycles without a failure reported.
- The DTC can be cleared from the PCM history by using a scan tool.
- The DTC will be cleared from history when the vehicle has achieved 40 warm-up cycles without a failure reported.
- The PCM will cancel the DTC default actions when the fault no longer exists and the ignition is cycled "off" long enough to power down the PCM.

Diagnostic Aids
- Verify that the transmission meets the specifications in the 4L30-E shift speed chart.
- Other internal transmission failures may cause more than one shift to occur.

Test Description
The numbers below refer to the step numbers on the diagnostic chart:
2. This test checks the function of the range switch (mode switch).
3. This test checks for selected gear ratio vs. a ratio not obtainable under normal driving conditions.

DTC P0757 Shift Solenoid B Performance (Stuck On)





Step 1 - 3





Step 4 and 5