DTC Troubleshooting
DTC P0848: Open in 3rd Clutch Transmission Fluid Pressure Switch Circuit, or 3rd Clutch Transmission Fluid Pressure Switch Stuck OFFNOTE:
^ Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
^ This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
4. Drive the vehicle in the 3rd gear in the D3 position, and verify that the SHIFT MAP NUMBER indicates 3rd in the DATA LIST with the HDS.
5. Check the 3rd PRESSURE SWITCH signal with the HDS in the DATA LIST.
Is the 3rd PRESSURE SWITCH ON?
YES - Go to step 6.
NO - Go to step 8.
6. Drive the vehicle in 3rd gear in the D3 position for more than 5 seconds, then shift to the D position, and drive in 4th gear for more than 5 seconds.
7. Monitor the OBD STATUS for P0848 in the DTCs MENU with HDS.
Does the screen indicate FAILED?
YES - Go to step 8.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the 3rd clutch transmission fluid pressure switch and the PCM. If the screen indicates NOT COMPLETED, go to step 6.
8. Turn the ignition switch OFF.
9. Disconnect the 3rd clutch transmission fluid pressure switch connector.
10. Turn the ignition switch ON (II).
11. Measure voltage between the 3rd clutch transmission fluid pressure switch connector terminal and body ground.
Is there about 5 V?
YES - Replace the 3rd clutch transmission fluid pressure switch, then go to step 13.
NO - Go to step 12.
12. Measure voltage between PCM connector terminal C5 and body ground.
Is thereabout 5 V?
YES - Repair open in the wire between PCM connector terminal C5 and the 3rd clutch transmission fluid pressure switch, then go to step 13.
NO - Go to step 20.
13. Reconnect all connectors.
14. Turn the ignition switch ON (II).
15. Clear the DTC with the HDS.
16. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
17. Drive the vehicle in 3rd gear in the D3 position for more than 5 seconds, then shift to the D position, and drive in 4th gear for more than 5 seconds.
18. Check for DTCs with the HDS.
Is DTC P0848 indicated?
YES - Check for poor connections or loose terminals between the 3rd clutch transmission fluid pressure switch and the PCM, then go to step 1.
NO - Go to step 19.
19. Monitor the OBD STATUS for P0848 in the DTCs MENU with HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete. If any other DTCs were indicated in step 18, go to the indicated DTC's troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals between the 3rd clutch transmission fluid pressure switch and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 16.
20. Update the PCM if it does not have the latest software, or substitute a known good PCM.
21. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
22. Drive the vehicle in 3rd gear in the D3 position for more than 5 seconds, then shift to the D position, and drive in 4th gear for more than 5 seconds.
23. Check for DTCs with the HDS.
Is DTC P0848 indicated?
YES - Check for poor connections or loose terminals between the 3rd clutch transmission fluid pressure switch and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 21. If the PCM was substituted, go to step 1.
NO - Go to step 24.
24. Monitor the OBD STATUS for P0848 in the DTCs MENU with HDS.
Does the screen indicate PASSED?
YES - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other DTCs were indicated in step 23, go to the indicated DTC's troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals between the 3rd clutch transmission fluid pressure switch and the PCM. If the PCM was updated, substitute a known good PCM, then go to step 21. If the PCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 21.