P1790-FAULT IMMEDIATELY AFTER SHIFT

For a complete wiring diagram Refer to Section 8W

Theory of Operation


This DTC will only be stored along with a gear ratio DTC. If this DTC is set, it indicates a probable hydraulic (line pressure) or mechanical problem exists. Diagnosing the transmission should be based on the associated speed ratio DTC and mechanical causes should be considered first.


  • When Monitored:

    After a speed ratio error is stored.

  • Set Condition:

    This DTC is set if the associated speed ratio DTC is stored within 1.3 seconds after a shift.


Possible Causes
  
FAULT AFTER SHIFT
  

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


INTENDED GEAR
  		CLUTCHES APPLYING
  		RECOMENDED DTC
  
REVERSE
  		UD** - MS
  		P0736
  
1ST
  		UD - LR*
  		P0731
  
2ND
  		UD - 2C
  		P0732
  
2ND PRIME
  		UD - 4C
  		P1736
  
3RD
  		UD - OD/MS
  		P0733
  
4TH
  		OD/MS - 4C
  		P0734
  
5TH
  		OD/MS - 2C
  		P0735
  
* L/R is used only up to 150 output RPM in 1st gear.
** UD will show as applied in Reverse but the UD clutch is actually released. OD/MS is OD and/or MS.
  



Diagnostic Test

1.INTENDED GEAR TO APPLIED CLUTCH




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Repair