DTC P0847
DTC P0847 : Transmission Fluid Pressure Switch B (3rd Clutch) Circuit Low
- Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the 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.
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P0847 Transmission Fluid Pressure Switch B (3rd Clutch) Circuit Low |
DTC (A/T)
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Clear the DTC with the HDS.
-3. Check the parameter(s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit 3rd Pressure Switch ON Do the current condition(s) match the threshold?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals between transmission fluid pressure switch B (3rd clutch) and the PCM.
- Determine possible failure area (transmission fluid pressure switch B (3rd clutch), others)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the following connector.
Transmission fluid pressure switch B (3rd clutch) 1P connector -3. Turn the vehicle to the ON mode.
-4. Check the parameter(s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit 3rd Pressure Switch OFF Do the current condition(s) match the threshold?
YES
Replace transmission fluid pressure switch B (3rd clutch) .
NO
Go to step 3.
- Shorted wire check (OP3SW line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Jump the SCS line with the HDS.
-3. Disconnect the following connector.
PCM connector B (51P) -4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Transmission fluid pressure switch B (3rd clutch) 1P connector: disconnected PCM connector B (51P): disconnected Test circuit OP3SW Test point 1 PCM connector B (51P) No. 25 (LT BLU) Test point 2 Body ground Is there continuity?
YES
Repair a short to ground in the OP3SW wire between transmission fluid pressure switch B (3rd clutch) and the PCM.
NO
The OP3SW wire is OK. Replace the PCM .