DTC P0CF0:00 [PCM (e-SKYACTIV)]

id300202032800


Outline

System malfunction location

Coolant temperature sensor circuit low input
Detection condition
•  The PCM detects that the voltage value of the coolant temperature sensor monitored by the PCM is abnormally low.
Fail-safe
•  Refer to "DTC Table" and "Fail-safe Function Malfunction Contents Table". (See DTC TABLE [PCM (e-SKYACTIV)].)
Possible cause
•  Coolant temperature sensor connector or terminals malfunction
•  Coolant temperature sensor malfunction
•  Short to ground in coolant temperature sensor signal circuit
•  PCM connector or terminals malfunction
•  Short circuit in coolant temperature sensor signal circuit and ground circuit
•  PCM malfunction


Diagnostic Procedure

Step

Inspection

Results

Action
1
RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
•  Record the snapshot data.
Note
•  Recording can be facilitated using the screen capture function of the PC.
—
Go to the next step.
2
INSPECT COOLANT TEMPERATURE SENSOR CONNECTOR FOR MALFUNCTION
•  Inspect the applicable connector and terminal.
•  Are the connector and terminal normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification 1.
3
DETERMINE IF COOLANT TEMPERATURE SENSOR OR WIRING HARNESS MALFUNCTION
•  Reconnect all disconnected connector.
•  Access the following PIDs using the M-MDS:
PCM:
―  E_WATER_TEMP
•  Connect a jumper wire between coolant temperature sensor terminals A and B (wiring harness-side).
•  Verify the E_WATER_TEMP PID value.
•  Is the voltage 4.94 V or below?
Yes
Replace the coolant temperature sensor, perform the repair completion verification 1.
(See COOLANT TEMPERATURE SENSOR REMOVAL/INSTALLATION.)
No
Go to the next step.
4
INSPECT COOLANT TEMPERATURE SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
•  Inspect the applicable circuit for a short to ground.
•  Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification 1.
5
INSPECT PCM CONNECTOR FOR MALFUNCTION
•  Inspect the applicable connector and terminal.
•  Are the connector and terminal normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification 1.
6
INSPECT COOLANT TEMPERATURE SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT CIRCUIT
•  Inspect the applicable circuits for a short circuit.
•  Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification 1.
Repair completion verification 1
VERIFY THAT VEHICLE IS REPAIRED
•  Install/connect the part removed/disconnected during the troubleshooting procedure.
•  Clear the DTC recorded in the memory.
•  Replicate the vehicle conditions at the time the DTC was detected using the following procedure.
Warning
•  While performing this step, always operate the vehicle in a safe and lawful manner.
•  When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.
―  Drive the vehicle under the snapshot data condition.
•  Perform the DTC inspection for the PCM.
•  Is the same Pending DTC present?
Yes
Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.H.D. (E)].)
(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].)
If the CAN communication is normal, perform the diagnosis from Step 1.
•  If the malfunction recurs, replace the PCM, then go to the next step.
No
Go to the next step.
Repair completion verification 2
VERIFY IF OTHER DTCs DISPLAYED
•  Perform the DTC inspection.
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.