P1790

P1790-FAULT IMMEDIATELY AFTER SHIFT

For a complete wiring diagram Refer to Diagrams/Electrical. Electrical Diagrams


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 problems. 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 42RLE Pre-Diagnostic Troubleshooting procedure before proceeding. 42RLE - Pre-Diagnostic Troubleshooting Procedure


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.

If there are no possible causes remaining, view repair.

Repair

- Refer to the appropriate test.
- Perform 42RLE TRANSMISSION VERIFICATION TEST. Transmission Verification Test