DTC P0847: Short in Transmission Fluid Pressure Switch B (3rd Clutch) Circuit, or Transmission Fluid Pressure Switch B (3rd Clutch) Stuck ON
NOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ).
- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
- If DTC P0847 is stored in the PCM, the transmission does not shift to any gear other than 3rd or 6th gear because of the fail-safe function.
- Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
- Clear the DTC with the HDS.
- Check the 3rd Pressure Switch signal with the HDS in the A/T Data List.
Is the 3rd Pressure Switch ON?
YES - Go to step 4.
NO - Intermittent failure, the system is OK at this time.
- Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
- Disconnect the transmission fluid pressure switch B (3rd clutch) connector.
- Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
- Check the 3rd Pressure Switch signal with the HDS in the A/T Data List.
Is the 3rd Pressure Switch OFF?
YES - Replace transmission fluid pressure switch B (3rd clutch) (see TRANSMISSION FLUID PRESSURE SWITCH B (3RD CLUTCH) REPLACEMENT ).
NO - Go to step 8.
- Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
- Jump the SCS line with the HDS.
- Disconnect PCM connector C (49P).
- Check for continuity between PCM connector terminal C38 and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Repair a short to body ground in the wire between PCM connector terminal C38 and transmission fluid pressure switch B (3rd clutch).
NO - Replace the PCM (see ECM/PCM REPLACEMENT ).