SFI SYSTEM, Diagnostic DTC:P023A00 and P023A71

DTC Code DTC Name
P023A00 Charge Air Cooler Coolant Pump Control Circuit/Open
P023A71 Charge Air Cooler Coolant Pump Control Actuator Stuck

DESCRIPTION

Refer to DTC P023A12.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P023A00

Charge Air Cooler Coolant Pump Control Circuit/Open

The speed of the electric water pump assembly is higher than the target speed by a certain amount or more (2 trip detection logic).

  • Lack of intercooler coolant

  • Intercooler coolant leak

  • Electric water pump assembly

Does not come on

DTC stored

SAE Code: P023A

P023A71

Charge Air Cooler Coolant Pump Control Actuator Stuck

The speed of the electric water pump assembly is lower than the target speed by a certain amount or more (2 trip detection logic).

Electric water pump assembly

Does not come on

DTC stored

SAE Code: P023A

MONITOR DESCRIPTION

The ECM monitors the speed of the electric water pump assembly. If the actual speed exceeds the target speed by a certain amount or more, the ECM determines overspeed operation has occurred. If the actual speed is less than the target speed by a certain amount or more, the ECM determines that the motor is stuck and stores a DTC.

CAUTION / NOTICE / HINT

Tip:

  • Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

  • P023A00 may be stored if there is insufficient coolant in the turbocharger and intercooler cooling system. If there is sufficient coolant in the system and P023A00 is output when the vehicle is brought to the workshop, check if the customer has added coolant in the past.

  • If the electric water pump assembly voltage is extremely high or low, control may be temporarily stopped and P023A71. When the voltage returns to normal, control will resume and it will not be necessary to replace the electric water pump assembly.

PROCEDURE

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P023A00 OR P023A71)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Read the DTCs.

      Powertrain > Engine > Trouble Codes

      Result

      Result

      Proceed to

      DTC P023A00 or P023A71 is output

      A

      DTC P023A00 or P023A71 and other DTCs are output

      B
      Tip:

      If any DTCs other than P023A00 or P023A71 are output, troubleshoot those DTCs first.

    B

    GO TO DTC CHART

    Click hereClick hereClick here

    A

  2. PERFORM ACTIVE TEST USING GTS (CONTROL THE INTERCOOLER WATER PUMP)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

      Note:

      Be sure to perform the inspection with the battery voltage at 11 V or higher.

      Tip:

      If the battery voltage is low, the electric water pump assembly may stop operating.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Intercooler Water Pump / Data List / All Data / Intercooler Water Pump Speed.

      Powertrain > Engine > Active Test

      Active Test Display

      Control the Intercooler Water Pump

      Data List Display

      Intercooler Water Pump Speed

    5. According to the display on the GTS, read the Data List while the Active Test "Control the Intercooler Water Pump" is set to 85%.

      Result

      GTS Operation

      Intercooler Water Pump Speed

      Proceed to

      85%

      4000 rpm or less

      A

      7000 rpm or higher

      B

      Other than above

      C
      Tip:

      • If the electric water pump assembly voltage is extremely high or low, control may be temporarily stopped and a DTC stored.

      • The coolant will freeze at -15°C (5°F) at 30% coolant concentration and at -35°C (-31°F) at 50% coolant concentration.

      • DTC P023A71 will be stored if the electric water pump assembly cannot rotate due to freezing of the coolant.

      • If DTC P023A71 is stored due to freezing of the coolant, the problem cannot be reproduced. Judge whether freezing of the coolant occurred from the coolant replacement history and the ambient temperature when the DTC was stored.

    B

    CHECK COOLANT LEVEL AT RESERVOIRClick here

    C

    CHECK FOR INTERMITTENT PROBLEMS

    Click here

    A

  3. REPLACE ELECTRIC WATER PUMP ASSEMBLY

    1. Replace the electric water pump assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    PERFORM ACTIVE TEST USING GTS (CONTROL THE INTERCOOLER WATER PUMP)Click here

  4. CHECK COOLANT LEVEL AT RESERVOIR

    1. Check the coolant (for intercooler) level.

      Click here

    Result

    Result

    Proceed to

    At or below reservoir tank LOW level

    A

    At or above reservoir tank LOW level

    B
    B

    BLEED AIRClick here

    A

  5. CHECK FOR COOLANT LEAK

    1. Check the turbocharger and intercooler cooling system for coolant leaks.

      Click here

      OK

      No leaks in turbocharger and intercooler cooling system.

    Result

    Proceed to

    OK

    NG
    OK

    BLEED AIRClick here

    NG

  6. REPAIR COOLANT LEAK

    1. Repair any coolant leaks.

    Result

    Proceed to

    NEXT
    NEXT

  7. BLEED AIR

    1. Bleed the air and add coolant up to the FULL Line on the reservoir tank.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  8. PERFORM ACTIVE TEST USING GTS (CONTROL THE INTERCOOLER WATER PUMP)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

      Note:

      Be sure to perform the inspection with the battery voltage at 11 V or higher.

      Tip:

      If the battery voltage is low, the electric water pump assembly may stop operating.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Intercooler Water Pump / Data List / All Data / Intercooler Water Pump Speed.

      Powertrain > Engine > Active Test

      Active Test Display

      Control the Intercooler Water Pump

      Data List Display

      Intercooler Water Pump Speed

    5. According to the display on the GTS, read the Data List while the Active Test "Control the Intercooler Water Pump" is set to 85%.

      Standard

      The value of Intercooler Water Pump Speed is 4000 to 7000 rpm.

    Result

    Proceed to

    NEXT
    NEXT

    END