40/41TE Automatic Transaxle (GPEC)

P1790-FAULT IMMEDIATELY AFTER SHIFT

For a complete wiring diagram Consult Diagrams/Electrical.

Theory of Operation

This DTC is not stored alone. It is stored if a Gear Ratio DTC is detected immediately after shift. The existence of DTC P1790 indicates a mechanical or hydraulic (not electrical) related problem. It should be noted, however, that all mechanical problems don't necessarily result in DTC P1790. When this DTC exists, diagnosing the system should be based on the associated DTC and only mechanical causes should be considered.

- When Monitored:
After a Gear Ratio Error code is stored.

- Set Condition:
After a Gear Ratio Error DTC has already been set. The DTC is set if the fault happened within 1.3 seconds of a shift. The DTC set time will vary from 1.214 seconds to 15 seconds.





Always perform the 40/41TE Pre-Diagnostic Troubleshooting procedure before proceeding. Testing and Inspection

Diagnostic Test

1. FAULT AFTER SHIFT
This DTC is set along with a Gear Ratio DTC. Perform the appropriate test for the Gear Ratio DTC stored.

NOTE: Check pending DTCs or 1 trip failures if there are no Active or Stored Gear Ratio DTCs.

View repair.

Repair

- Diagnose and repair the DTC(s).