DTC Troubleshooting: P0842 (25-3) (A/T)

DTC Troubleshooting: P0842 (25-3)

DTC P0842:

Short in 2nd Clutch Transmission Fluid Pressure Switch Circuit, or 2nd 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 2nd PRES SWITCH signal with the Honda PGM Tester or HDS in the A/T data list when not in 2nd gear. Is the 2nd PRES SWITCH OFF? 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 2nd 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 P0842. 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 2nd clutch transmission fluid pressure switch connector.

7.	Turn the ignition switch ON (II).

8.	Check the 2nd PRES SWITCH signal with the Honda PGM Tester or HDS in the A/T data list. Is the 2nd PRES SWITCH OFF? YES - Replace the 2nd 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 C13 and body ground.

Is there continuity?

YES - Repair short to ground in the wire between PCM connector terminal C13 and the 2nd 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 P0842. Did the result pass? YES - The problem has been corrected.n NO - Return to step 1 and recheck.n