DTC Troubleshooting

DTC Troubleshooting: P0842 (25-3)

DTC P0842:

Short in Transmission Fluid Pressure Switch A (2nd Clutch) Circuit, or Transmission Fluid Pressure Switch A (2nd 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 How to Troubleshoot the A/T System.
- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
- If DTC P0842 is stored in the PCM, the transmission does not shift to any gear other than 2nd or 5th gear because of the fail-safe function.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Check the 2nd Pressure Switch signal with the HDS in the A/T Data List.

Is the 2nd Pressure Switch ON?

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time.

4. Turn the ignition switch to LOCK (0).

5. Disconnect the transmission fluid pressure switch A (2nd clutch) connector.

6. Turn the ignition switch to ON (II).

7. Check the 2nd Pressure Switch signal with the HDS in the A/T Data List.

Is the 2nd Pressure Switch OFF?

YES -

Replace transmission fluid pressure switch A (2nd clutch) Transmission Fluid Pressure Switch A (2nd Clutch) Replacement.

NO -

Go to step 8.

8. Turn the ignition switch to LOCK (0).

9. Jump the SCS line with the HDS.

10. Disconnect PCM connector C (49P).

11. Check for continuity between PCM connector terminal C27 and body ground.





Is there continuity?

YES -

Repair a short to body ground in the wire between PCM connector terminal C27 and transmission fluid pressure switch A (2nd clutch).

NO -

Replace the PCM Service and Repair.