DTC Troubleshooting: P0848 (26)
DTC P0848:
 Open in 3rd Clutch Transmission Fluid Pressure Switch Circuit, or 3rd Clutch Transmission Fluid Pressure Switch Stuck OFF
NOTE:
  • Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, 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.
R20A3 Engine Model
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
  1. Test-drive the vehicle in 3rd gear in S with the sequential shift mode, and check that the Shift Control indicates 3 in the Data List with the HDS.
  1. Check the 3rd Pressure Switch in the Data List with the HDS.
Is the 3rd Pressure Switch ON?
YES -
Go to Step 6 .
NO -
Go to Step 8 .
  1. Test-drive the vehicle in 3rd gear with the shift lever in D for at least 2 seconds.
  1. Monitor the OBD STATUS for P0848 in the DTCs MENU with the HDS.
Does the HDS indicate FAILED?
YES -
Go to Step 8 .
NO -
If the HDS indicates PASSED, 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 HDS indicates NOT COMPLETED, go to Step 6 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the 3rd clutch transmission fluid pressure switch connector.
  1. Turn the ignition switch to ON (II).
  1. Measure the 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 16 .
NO -
Go to Step 12 .
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. Disconnect PCM connector B (44P).