SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P023A13

DTC Code DTC Name
P023A13 Charge Air Cooler Coolant Pump Control Circuit Open

DESCRIPTION

Refer to DTC P023A12.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P023A13 Charge Air Cooler Coolant Pump Control Circuit Open The speed of the electric coolant pump calculated from the IWPI signal is less than 10 rpm (open or short in the IWPI circuit) (1 trip detection logic).

  • Open or short in electric water pump assembly circuit

  • Electric water pump assembly

  • EFI-MAIN NO. 3 relay

  • ECM

 - DTC stored SAE: P023A
Related Data List
DTC No. Data List
P023A13

  • Intercooler Water Pump Speed

  • Intercooler Water Pump

MONITOR DESCRIPTION

The ECM receives a frequency signal (IWPI) from the electric water pump assembly and calculates the speed of the electric water pump assembly. As the frequency signal (IWPI) is 4 Hz when the electric water pump assembly is stopped to enable the ECM to detect an open or short in the signal line, the electric water pump assembly speed will be displayed as approximately 160 rpm even when the pump is stopped. If the electric water pump assembly speed is calculated to be less than 10 rpm, the ECM judges that there is an open or short in the IWPI circuit and stores this DTC.

CONFIRMATION DRIVING PATTERN


  1. B006EE7E02

  2. Connect the GTS to the DLC3.

  3. Turn the engine switch on (IG).

  4. Turn the GTS on.

  5. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  6. Turn the engine switch off and wait for at least 30 seconds.

  7. Turn the engine switch on (IG).

  8. Turn the GTS on.

  9. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].

  10. Accelerate to 50 km/h (31 mph) or more with the accelerator pedal fully depressed [B].

    Note

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  11. Enter the following menus: Powertrain / Engine / Trouble Codes [C].

  12. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  13. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  14. Input the DTC: P023A13.

  15. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions

    Tech Tips


    • If the judgment result is NORMAL, the system is normal.

    • If the judgment result is ABNORMAL, the system has a malfunction.

    • If the judgment result is INCOMPLETE, perform steps [B] through [C] again.

WIRING DIAGRAM

Refer to DTC P023A12.

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CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

Tech Tips

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.

PROCEDURE


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


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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


      Powertrain > Engine > Active Test
      Tester Display
      Control the Intercooler Water Pump

    5. Perform the Active Test. Check that the electric water pump assembly is operating (vibrating).

      OK
      The electric water pump assembly is operating (vibrating).

      Tech Tips

      Use a sound scope if the operation is difficult to check.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (ELECTRIC WATER PUMP ASSEMBLY - BODY GROUND) Click here

    OK

  2. CHECK ECM (IWPI VOLTAGE)


    1. Disconnect the electric water pump assembly connector.

    2. Turn the engine switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B2-2 (NWP) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ELECTRIC WATER PUMP ASSEMBLY Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (ELECTRIC WATER PUMP ASSEMBLY - ECM)


    1. Disconnect the electric water pump assembly connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      B2-2 (NWP) - A95-20 (IWPI) Always Below 1 Ω
      B2-2 (NWP) or A95-20 (IWPI) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. CHECK HARNESS AND CONNECTOR (ELECTRIC WATER PUMP ASSEMBLY - BODY GROUND)


    1. Disconnect the electric water pump assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      B2-1 (PGND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT EFI-MAIN NO. 3 RELAY


    1. Inspect the EFI-MAIN NO. 3 relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE EFI-MAIN NO. 3 RELAY

    OK

  6. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ELECTRIC WATER PUMP ASSEMBLY)


    1. Disconnect the electric water pump assembly connector.

    2. Turn the engine switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B2-4 (+B) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ELECTRIC WATER PUMP ASSEMBLY Click here

    NG

  7. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF EFI-MAIN NO. 3 RELAY)

    B006FHSC01
    *1 No. 1 Engine Room Relay Block and Junction Block Assembly
    *2 EFI-MAIN NO. 3 Relay

    1. Remove the EFI-MAIN NO. 3 relay from the No. 1 engine room relay block and junction block assembly.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      3 (EFI-MAIN NO. 3 relay) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - EFI-MAIN NO. 3 RELAY)

    OK

  8. CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 3 RELAY - BODY GROUND)


    1. Remove the EFI-MAIN NO. 3 relay from the No. 1 engine room relay block and junction block assembly.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (EFI-MAIN NO. 3 relay) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 3 RELAY - ELECTRIC WATER PUMP ASSEMBLY)


    1. Remove the EFI-MAIN NO. 3 relay, A/F HTR relay, VVT NO. 1 relay and VVT NO. 2 relay from the No. 1 engine room relay block and junction block assembly.

      Tech Tips

      Remove the A/F HTR relay, VVT NO. 1 relay and VVT NO. 2 relay connected between the checked terminals as the coil inside the relay influences the measurement value.

    2. Disconnect the electric water pump assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      5 (EFI-MAIN NO. 3 relay) - B2-4 (+B) Always Below 1 Ω
      5 (EFI-MAIN NO. 3 relay) or B2-4 (+B) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - EFI-MAIN NO. 3 RELAY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR