DTC P2857

DTC P2857  : Clutch Pressure Regulator Low Current

DTC (A/T)

1. Problem verification

   - 1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Turn the vehicle to the OFF (LOCK) mode.

   - 4. Turn the vehicle to the ON mode, and wait for several seconds.

   - 5. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P2857 Clutch Pressure Regulator Low Current

   Is DTC P2857 indicated?

   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 the sensor unit and the TCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

2. Open wire check (LSA, LSB, LSC, LSD, VBSOL2 lines)

   - 1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connectors.

   TCM subharness 26P connector

   TCM 58P connector

   - 3. Check for continuity between test points 1 and 2 individually.

   Test condition	Vehicle OFF (LOCK) mode
   	TCM subharness 26P connector: disconnected
   	TCM 58P connector: disconnected
   Test point 1	TCM subharness 26P connector No. 3
   Test point 2	TCM 58P connector No. 54 - Refer to: A/T Control System Connector for Inputs and Outputs (2016 2017 2018), or A/T Control System Connector for Inputs and Outputs (2019), or A/T Control System Connector for Inputs and Outputs (2020 2021) .

   Test point 1	TCM subharness 26P connector No. 4
   Test point 2	TCM 58P connector No. 6 - Refer to: A/T Control System Connector for Inputs and Outputs (2016 2017 2018), or A/T Control System Connector for Inputs and Outputs (2019), or A/T Control System Connector for Inputs and Outputs (2020 2021) .

   Test point 1	TCM subharness 26P connector No. 5
   Test point 2	TCM 58P connector No. 55 - Refer to: A/T Control System Connector for Inputs and Outputs (2016 2017 2018), or A/T Control System Connector for Inputs and Outputs (2019), or A/T Control System Connector for Inputs and Outputs (2020 2021) .

   Test point 1	TCM subharness 26P connector No. 6
   Test point 2	TCM 58P connector No. 40 - Refer to: A/T Control System Connector for Inputs and Outputs (2016 2017 2018), or A/T Control System Connector for Inputs and Outputs (2019), or A/T Control System Connector for Inputs and Outputs (2020 2021) .

   Test point 1	TCM subharness 26P connector No. 7
   Test point 2	TCM 58P connector No. 53 - Refer to: A/T Control System Connector for Inputs and Outputs (2016 2017 2018), or A/T Control System Connector for Inputs and Outputs (2019), or A/T Control System Connector for Inputs and Outputs (2020 2021) .

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The LSA, LSB, LSC, LSD, and VBSOL2 wires are not open. Go to step 3.

   NO 

   Repair an open in the LSA, LSB, LSC, LSD, and/or VBSOL2 wire between the sensor unit and the TCM.

3. Shorted wire check (LSA, LSB, LSC, LSD, VBSOL2 lines)

   - 1. Check for continuity between the following test points and body ground individually.

   Test condition

   Vehicle OFF (LOCK) mode

   	TCM subharness 26P connector: disconnected
   	TCM 58P connector: disconnected

   Connector	Terminal
   TCM 58P connector - Refer to: A/T Control System Connector for Inputs and Outputs (2016 2017 2018), or A/T Control System Connector for Inputs and Outputs (2019), or A/T Control System Connector for Inputs and Outputs (2020 2021) .	No. 6
   	No. 40
   	No. 53
   	No. 54
   	No. 55

   Is there continuity?

   YES 

   Repair a short to ground in the LSA, LSB, LSC, LSD, and/or VBSOL2 wire between the sensor unit and the TCM.

   NO 

   The LSA, LSB, LSC, LSD, and VBSOL2 wires are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good TCM .