DTC P0CF1 (1062)

DTC P0CF1  : PCU Coolant Temperature Sensor Circuit High

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)	More than 4.9	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 (PCU coolant temperature sensor, others)

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

   -2. Disconnect the following connector.

   PCU coolant temperature sensor 2P connector

   -3. Connect terminals A and B with a jumper wire.

   Terminal A	PCU coolant temperature sensor 2P connector (female terminals) No. 1:
   Terminal B	PCU coolant temperature sensor 2P connector (female terminals) No. 2:

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

   -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)	More than 4.9	V

   Does the current condition(s) match the threshold?

   YES 

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

   NO 

   Replace the PCU coolant temperature sensor .

3. Determine possible failure area (TWPCU/PCU_TW_SNSR line, others)

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

   -2. Remove the jumper wire from the PCU coolant temperature sensor 2P connector.

   -3. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	PCU coolant temperature sensor 2P connector: disconnected
   Test point 1	PCU coolant temperature sensor 2P connector (female terminals) No. 1:
   Test point 2	Body ground

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

   Is there about 5.0 V?

   YES 

   Go to step 4.

   NO 

   Go to step 5.

4. Open wire check (SGTEMP/SGTMP/PCU_TW_SNSR_GND 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. 17
   Test point 2	PCU coolant temperature sensor 2P connector (female terminals) No. 2:

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

   Is there 1.0 Ω or less?

   YES 

   Replace the PCU .

   NO 

   Repair an open in the SGTEMP/SGTMP/PCU_TW_SNSR_GND wire between the PCU coolant temperature sensor and the PCU.

5. Open 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	PCU coolant temperature sensor 2P connector (female terminals) No. 1:

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

   Is there 1.0 Ω or less?

   YES 

   Replace the PCU .

   NO 

   Repair an open in the TWPCU/PCU_TW_SNSR wire between the PCU coolant temperature sensor and the PCU.