P1775-SOLENOID SWITCH VALVE LATCHED IN TCC POSITION





For a complete wiring diagram Refer to Section 8W.

Theory of Operation


The Solenoid Switch Valve (SSV) controls the direction of the transmission fluid when the L/R Solenoid is energized. The SSV will be in the downshifted position in 1st gear, thus directing the fluid to the L/R clutch circuit. In 2nd through 5th gears, it will be in the upshifted position and directing the fluid into the torque converter clutch (TCC).

When shifting into 1st gear, a special hydraulic sequence is performed to ensure SSV movement into the downshifted position. The L/R Pressure Switch is monitored to confirm SSV movement. If movement is not confirmed (the L/R pressure switch does not close), EMCC is inhibited until SSV operation is confirmed.


  • When Monitored:

    During an attempted shift into 1st gear.

  • Set Condition:

    This DTC is set if three unsuccessful attempts are made to shift the Solenoid Switch Valve (SSV) into the downshifted position in one given ignition start. This DTC can take up to five minutes to mature before illuminating the MIL.


Possible Causes
  
RELATED DTC P0841 PRESENT
  
SOLENOID SWITCH VALVE STICKING
  
L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO OTHER CIRCUITS
  
TRANSMISSION SOLENOID/TRS ASSEMBLY
  
POWERTRAIN CONTROL MODULE
  

Always perform the 45RFE/545RFE Pre-Diagnostic Troubleshooting Procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)



Diagnostic Test

1.DETERMINING IF RELATED DTC'S ARE PRESENT



Is the DTC P0841 present also?

Yes
  • Refer to the Transmission category and perform the appropriate symptom.


No
  • Go To 2

2.CHECK TO SEE IF DTC P1775 IS CURRENT



NOTE: This counter only applies to the last DTC set.



Is the STARTS SINCE SET counter for P1775 at 2 or less?

Yes
  • Go To 3


No
  • Go To 6

3.PCM AND WIRING



CAUTION: Removal of the Starter Relay will prevent the vehicle from being started in gear.


WARNING: The Starter Relay must be removed from the PDC. Failure to do so can result in personal injury or death.


NOTE: Failure to remove the Starter Relay can cause a Transmission - No Response condition.







Did the state of the L/R Pressure Switch change while pressing the Pressure Switch Test button?

Yes
  • Go To 4


No
  • Go To 5

4.SOLENOID SWITCH VALVE STICKING






Is the Solenoid Switch Valve or Plugs sticking?

Yes


No

5.L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO OTHER CIRCUITS








Is the resistance below 5.0 ohms between the (T50) L/R Pressure Switch Sense circuit and all other circuit(s) in the Transmission Solenoid/TRS Assembly harness connector?

Yes


No
  • Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the PCM per the Service Information. With the scan tool, perform QUICK LEARN.
  • Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)

6.INTERMITTENT WIRING AND CONNECTORS






Where there any problems found?

Yes


No
  • Test Complete.