SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P261A12, P261A14

DTC Code DTC Name
P261A12 Coolant Pump "B" Circuit Short to Battery
P261A14 Coolant Pump "B" Circuit Short to Ground or Open

DESCRIPTION

Refer to DTC P148F00.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P261A12 Coolant Pump "B" Circuit Short to Battery Engine water pump assembly output voltage is higher than the threshold while the engine water pump assembly is operating (1 trip detection logic).

  • Open or short in engine water pump assembly circuit

  • Engine water pump assembly

  • ENG W/PMP relay

  • ECM

 Comes on DTC stored SAE Code: P261D
P261A14 Coolant Pump "B" Circuit Short to Ground or Open Engine water pump assembly output voltage is less than the threshold while the engine water pump assembly is operating (1 trip detection logic).

  • Open or short in engine water pump assembly circuit

  • Engine water pump assembly

  • ENG W/PMP relay

  • ECM

 Comes on DTC stored SAE Code: P261C

MONITOR DESCRIPTION

The engine water pump assembly operates steplessly based on a duty cycle signal sent from the ECM. If actual drive duty cycle ratio does not correspond to the target drive duty cycle of the engine water pump assembly, the ECM detects the malfunction and stores DTC.

MONITOR STRATEGY

Required Sensors/Components Engine water pump assembly
Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG).

  3. Turn the GTS on.

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

  5. Turn the power switch off and wait for at least 30 seconds.

  6. Turn the power switch on (IG).

  7. Turn the GTS on.

  8. Put the engine in Inspection Mode (Maintenance Mode).

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

  10. Idle the engine for 20 seconds or more [A].

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

  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: P261A12 or P261A14.

  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
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


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

    • If the judgment result is ABNORMAL, the system is malfunctioning.

    • If the judgment result is INCOMPLETE or N/A, perform steps [A] and [B] again.

WIRING DIAGRAM

B004QJYE01

CAUTION / NOTICE / HINT

Note


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

  • Vehicle Control History may be stored in the hybrid vehicle control ECU if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.

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    (Select Powertrain in Health Check and then check the time stamp data.)

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  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    Click here

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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE


  1. INSPECT RELAY (ENG W/PMP RELAY)


    1. Inspect the ENG W/PMP relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RELAY (ENG W/PMP RELAY)

    OK

  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ENGINE WATER PUMP ASSEMBLY)

    Tech Tips

    Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.


    1. Disconnect the engine water pump assembly connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      C13-1 (+B) - Body ground Power switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (ENG W/PMP RELAY - ENGINE WATER PUMP ASSEMBLY) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (ENGINE WATER PUMP ASSEMBLY - BODY GROUND)

    Tech Tips

    Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.


    1. Disconnect the engine water pump assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C13-5 (PGND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (ENGINE WATER PUMP ASSEMBLY - ECM)


    1. Disconnect the engine 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
      C13-2 (NWP) - C31-68 (WPI) Always Below 1 Ω
      C13-4 (SWP) - C31-69 (WPO) Always Below 1 Ω
      C13-2 (NWP) or C31-68 (WPI) - Body ground and other terminals Always 10 kΩ or higher
      C13-4 (SWP) or C31-69 (WPO) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK TERMINAL VOLTAGE (SWP VOLTAGE)


    1. Disconnect the engine water pump assembly connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      C13-4 (SWP) - Body ground Power switch on (IG) Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ECM Click here

    OK

  6. INSPECT ECM


    1. Disconnect the engine water pump assembly connector.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Engine / Active Test / Activate the Electric Water Pump.


      Powertrain > Engine > Active Test
      Tester Display
      Activate the Electric Water Pump

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C13-4 (SWP) - Body ground Active Test not being performed → Active Test being performed

      Active Test not being performed: The resistance value is stable

      Active Test being performed: The resistance value fluctuates*

      Tech Tips


      • *: Using the Active Test, duty control of the transistors in the ECM will be performed. Due to the duty control, resistance of the WPO terminal of the ECM will be unstable during the Active Test.

      • If the resistance is stable when the Active Test is not being performed and fluctuates while the Active Test is being performed, it can be determined that the transistor is operating.

      • If the transistor does not operate during the Active Test, the ECM may be malfunctioning.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ENGINE WATER PUMP ASSEMBLY Click here

    NG

    REPLACE ECM Click here

  7. CHECK HARNESS AND CONNECTOR (ENG W/PMP RELAY - ENGINE WATER PUMP ASSEMBLY)


    1. Remove the ENG W/PMP relay from the No. 1 engine room relay block and No. 1 junction block assembly.

    2. Disconnect the engine 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 (ENG W/PMP relay) - C13-1 (+B) Always Below 1 Ω
      5 (ENG W/PMP relay) or C13-1 (+B) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (ENG W/PMP RELAY - BODY GROUND)


    1. Remove the ENG W/PMP relay from the No. 1 engine room relay block and No. 1 junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (ENG W/PMP relay) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ENG W/PMP RELAY)

    B004QABC02
    *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
    *2 ENG W/PMP Relay

    1. Remove the ENG W/PMP relay from the No. 1 engine room relay block and No. 1 junction block assembly.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      3 (ENG W/PMP relay) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 1 INTEGRATION RELAY - ENG W/PMP RELAY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - ENG W/PMP RELAY)