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DTC P0CEF-P0CF1

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0CEF: Hybrid/EV Electronics Coolant Temperature Sensor Performance

DTC P0CF0: Hybrid/EV Electronics Coolant Temperature Sensor Circuit Low Voltage

DTC P0CF1: Hybrid/EV Electronics Coolant Temperature Sensor Circuit High Voltage

Circuit/System Description

The hybrid/EV electronics have a coolant temperature sensor. The hybrid/EV electronics coolant temperature sensor is located in the coolant radiator. The temperature sensor is a variable resistor that measures the temperature of the hybrid/EV electronics coolant. The hybrid/EV electronics coolant temperature sensor resistance changes with battery coolant temperature. The lower the temperature, the higher the resistance of the sensor. The higher the temperature, the lower the resistance of the sensor. The hybrid/EV powertrain control module 2 uses the hybrid/EV electronics coolant temperature sensor to determine the hybrid/EV electronics temperature to control the hybrid/EV electronics cooling operation.

Conditions for Running the DTC

P0CEF

    • The 12 V battery voltage is greater than or equal to 9 V.
    • Ignition is not in CRANK.
    • No fault on power inverter max. temperature sensor.
    • Hybrid/EV electronics coolant pump off soak time is greater than 6 hours OR hybrid/EV electronics coolant pump off soak time is greater than 6 hours and has been enabled for less than 15 seconds.
    • None of the following DTCs are set; P0606, P0CF1, P0CF0, P0CE9, P0CED, P0A2D, P0A2C, P0A2B, P0A2F, P0A31, P0A32, P0A33 or P0A35.
        OR
    • The 12 V battery voltage is greater than or equal to 9 V.
    • Ignition is in RUN.
    • The propulsion system active.
    • The hybrid/EV electronics coolant pump is enabled.
    • The hybrid/EV electronics coolant pump speed (duty cycle) is between within 30% and 90%.
    • None of the following DTCs are set; P0CF1, P0CF0, P0CE9, P0CED, P1ED6, P1ED7, P1ED8, P0A2D, P0A2C, P0A2B, P0A2F, P0A31, P0A32, P0A33 or P0A35.
        OR
    • The 12 V battery voltage is greater than or equal to 9 V.
    • Ignition is OFF.
    • The hybrid/EV electronics coolant pump is enabled.
    • The hybrid/EV electronics coolant pump speed (duty cycle) is between within 30% and 90%.
    • The vehicle is in charge mode.
    • None of the following DTCs are set; P0CF1, P0CF0, P0CE9, P0CED, P1ED7, P1ED6 or P1ED8.

P0CF0 and P0CF1

    • The ignition is ON.
    • The 12 V battery voltage is greater than or equal to 9 V.

Conditions for Setting the DTC

P0CEF

    • The coolant temperature does not fall within 30°C (86°F) of the Drive Motor A Inverter Temperature or Drive Motor B Inverter Temperature (the higher of the two readings).
        OR
    •  The coolant temperature does not fall within 20°C (68°F) and the battery charger temperature is 10°C (50°F).
        OR
    • The coolant temperature does not fall within 10°C (50°F) of the battery charger temperature.

P0CF0

The hybrid/EV electronics coolant temperature is greater than 87.5°C (189.5°F).

P0CF1

The hybrid/EV electronics temperature is less than -40°C (-40°F).

Action Taken When the DTC Sets

DTC P0CEF-P0CF1 are type B DTCs.

Conditions for Clearing the DTC

DTC P0CEF-P0CF1 are type B DTCs.

Diagnostic Aids
    • Low or no coolant in the system may set a DTC P0CF0.
    • An inoperative hybrid/EV electronics coolant pump may set a DTC P0CEF.

Reference Information

Schematic Reference

Hybrid Cooling Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Hybrid Cooling System Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Vehicle in Service Mode, observe the scan tool hybrid/EV powertrain control module 2 Hybrid Electronics Coolant Temperature parameter. The readings should be between -39 and +85°C (-38.2 and +185°F).

Circuit/System Testing

Danger: Any hybrid/EV battery pack replacement shall be performed by High-Voltage Qualified Technicians only. The replacement procedure can be found in the service instruction and must be strictly followed at all times. The High-Voltage Qualified Technician is responsible for adherence to the manufacturer's service instructions as well as current national legal regulations. If the hybrid/EV battery pack needs to be replaced contact the Technical Assistance Centre for further instructions prior to removal of the battery pack.

  1. Vehicle in Service Mode, verify that DTC P0CE9 or P0CED is not set.
    2. ⇒If DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
  2. Ignition OFF, disconnect the harness connector at the B202 hybrid/EV electronics coolant temperature sensor.
  3. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 10 Ω between the low reference circuit terminal 2 and ground.
    4. ⇒If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K114B hybrid/EV powertrain control module 2.
  4. Vehicle in Service Mode, verify the scan tool Hybrid Electronics Coolant Temperature is less than -35 °C (-38.2 °F).
    5. ⇒If greater than the specified range, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the K114B hybrid/EV powertrain control module 2.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the low-reference circuit terminal 2. Verify that the scan tool Hybrid Electronics Coolant Temperature parameter is greater than 127°C (260.6°F).
    6. ⇒If less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K114B hybrid/EV powertrain control module 2.
  6. If all circuits test normal, test or replace the B202 hybrid/EV electronics coolant temperature sensor.

Component Testing
  1. Ignition OFF, disconnect the harness connector at the B202 hybrid/EV electronics coolant temperature sensor.
  2. Test for 54-75.5k Ω at approximately 21.11°C (70°F) between the signal terminal and the low-reference terminal.
    3. ⇒If not within the specified range, replace the B202 hybrid/EV electronics coolant temperature sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

    •  Coolant Temperature Sensor Replacement
    • Control Module References for hybrid/EV powertrain control module 2 replacement, programming and set-up
   


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