45RFE / 545RFE Transmission
P1790-FAULT IMMEDIATELY AFTER SHIFTFor the Transmission circuit diagram, refer to Wiring Diagram Information.
^ 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 Pre-Diagnostic Troubleshooting procedure before proceeding. Verification Tests
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.
Diagnostic Test
1. INTENDED GEAR TO APPLIED CLUTCH
With the scan tool, check the EATX DTC EVENT DATA to determine in which gear the slippage occurred and the clutches that were applied.
With the EATX DTC EVENT DATA, use the information provided above to determine the proper symptom for diagnosis.
View repair
Repair
Refer to the Transmission category and perform the appropriate symptom identified from the EATX DTC EVENT DATA, intended gear, and applied clutches.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. Verification Tests