DTC Troubleshooting: P0847 (26-3) (A/T)

DTC Troubleshooting: P0847 (26-3)

DTC P0847:

Short in 3rd Clutch Transmission Fluid Pressure Switch Circuit, or 3rd Clutch Transmission Fluid Pressure Switch Stuck ON

NOTE:

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 in CLEAR MENU with the Honda PGM Tester or HDS.

2.	Check the 3rd PRES SWITCH signal with the Honda PGM Tester or HDS in the A/T data list when not in 3rd gear. Is the 3rd PRES SWITCH ON? YES - Go to 3. NO - Go to 5.

3.	Start the engine, and warm it up to normal operating temperature (the radiator fan comes on). Drive the vehicle in 3rd gear in the [M] position for about 5 seconds, then upshift to 4th gear, and drive in 4th gear for about 5 seconds. Slow down and stop the wheels.

4.	Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0847. Did the result fail? YES - Go to 5. NO - Intermittent failure, the system is OK at this time. If the tester indicates NOT COMPLETE, return to step 3 and recheck.n

5.	Turn the ignition switch OFF.

6.	Disconnect the 3rd clutch transmission fluid pressure switch connector.

7.	Turn the ignition switch ON (II).

8.	Check the 3rd PRES SWITCH signal with the Honda PGM Tester or HDS in the A/T data list. Is the 3rd PRES SWITCH OFF? YES - Replace the 3rd clutch transmission fluid pressure switch. After replacing the switch, go to 13, and check that the repair has been completed. NO - Go to 9.

9.	Turn the ignition switch OFF.

10.	Jump the SCS line with the Honda PGM Tester or HDS.

11.	Disconnect PCM connector C (22P).

12.

Check for continuity between PCM connector terminal C10 and body ground.

Is there continuity?

YES - Repair short to ground in the wire between PCM connector terminal C10 and the 3rd clutch transmission fluid pressure switch.n

NO - Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.n

13.	Clear the DTC in CLEAR MENU with the Honda PGM Tester or HDS.

14.	Test-drive the vehicle for several minutes under the same conditions as those indicated by the freeze data.

15.	Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0847. Did the result pass? YES - The problem has been corrected.n NO - Return to step 1 and recheck.n