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 CLUTCHWith the scan tool, check the DTC EVENT DATA to determine in which gear the slippage occurred and the clutches that were applied.
With the 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 DTC EVENT DATA, intended gear, and applied clutches.
- Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)