DTC P0CF0 (1063)

DTC P0CF0  : PCU Coolant Temperature Sensor Circuit Low

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC (Electric Powertrain)

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.

   -5. Check the parameter(s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   PCU Coolant Temperature Sensor Voltage (TRC)	Less than 0.08	V

   Does 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. 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. Determine possible failure area ((TWPCU/PCU_TW_SNSR line, PCU coolant temperature sensor)

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

   -2. Disconnect the following connector.

   PCU coolant temperature sensor 2P 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
   PCU Coolant Temperature Sensor Voltage (TRC)	About 5.0 V	V

   Does the current condition(s) match the threshold?

   YES 

   Replace the PCU coolant temperature sensor .

   NO 

   The PCU coolant temperature sensor is OK. Go to step 3.

3. Shorted wire check (TWPCU/PCU_TW_SNSR line)

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

   -2. Do the 12 volt battery terminal disconnection procedure .

   -3. Disconnect the following connector.

   PCU 33P connector

   -4. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCU 33P connector: disconnected
   	PCU coolant temperature sensor 2P connector: disconnected
   Test point 1	PCU 33P connector No. 16
   Test point 2	Body ground

   Is there 1 MΩ or more?

   YES 

   Replace the PCU .

   NO 

   Repair a short in the TWPCU/PCU_TW_SNSR wire between the PCU coolant temperature sensor and the PCU.