P2798
DTC P2798: Short in Auxiliary Transmission Fluid Pump (ATFP) Motor U-phase Circuit, V-phase Circuit, or W-phase CircuitNOTE:
^ Record all freeze data and review General Troubleshooting Information before you troubleshoot.
^ This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
1. Clear the DTC with the HDS.
2. Choose ATFP Motor Test in Miscellaneous Test Menu, and do the test.
3. Do the ATFP Motor Test again in about 10 seconds after finishing the preceding test.
4. Do the ATFP Motor Test again in about 10 seconds after finishing the preceding test.
5. Check that DTC2798 recurs.
Is DTC P2798 indicated?
YES - Go to step 6.
NO - Intermittent failure, the system is OK at this time.
6. Turn the ignition switch OFF.
7. Disconnect ATFP control unit connector and ATFP motor connector.
8. Check for continuity between ATFP control unit connector terminals No. 1 and body ground, between No. 2 and body ground, and between No. 6 and body ground.
Is there continuity?
YES - Repair a short to ground in the wire(s) between ATFP control unit connector terminals No. 1, No. 2, and No. 6, and the ATFP motor, then go to step 10.
NO - Go to step 9.
9. Check for continuity between ATFP motor connector terminals No. 1 and body ground, between No. 2 and body ground, and between No. 3 and body ground.
Is there continuity?
YES - Replace the ATFP, then go to step 10.
NO - Replace the ATFP control unit, then go to step 10.
10. Clear the DTC with the HDS.
11. Warm up the engine to normal operating temperature (the radiator fan comes on).
12. Choose ATFP Motor Test in Miscellaneous Test Menu, and do the test.
13. Do the ATFP Motor Test again in about 10 seconds after finishing the preceding test.
14. Do the ATFP Motor Test again in about 10 seconds after finishing the preceding test.
15. Monitor the OBD status for P2798 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate PASSED?
YES - Troubleshooting is complete.
NO - Return to step 6 and recheck.