SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P26CA14

DTC Code DTC Name
P26CA14 Engine Coolant Pump Circuit Short to Ground or Open

DESCRIPTION

Refer to DTC P26CA12.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P26CA14 Engine Coolant Pump Circuit Short to Ground or Open The operation duty ratio (WPO) of the monitoring engine water pump assembly becomes a certain amount or less when engine water pump assembly operation command is output (1 trip detection logic).

  • Open or short in engine water pump assembly (water inlet housing) circuit

  • Engine water pump assembly (water inlet housing)

  • ECM

 Comes on DTC stored SAE Code: P26CC
Related Data List
DTC No. Data List
P26CA14

  • Coolant Temperature

  • Electric Water Pump Target Speed

  • Electric Water Pump Speed

MONITOR DESCRIPTION

The ECM outputs an operation duty signal (WPO) to steplessly control the speed of the engine water pump assembly. The ECM outputs an operation duty signal (WPO) to the engine water pump assembly and monitors the actual duty signal (WPO) being output. When the operation duty signal (WPO) is being output to the to the engine water pump assembly and the actual operation duty signal (WPO) is a certain value or less, the ECM detects a malfunction and stores a 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 ignition switch to ON.

  3. Turn the GTS on.

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

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

  6. Turn the ignition switch to ON [A].

  7. Turn the GTS on.

  8. Move the shift lever to P [B].

  9. Start the engine and maintain the engine speed at 2500 rpm or more for at least 40 seconds [C].

  10. Enter the following menus: Powertrain / Engine / Trouble Codes [D].

  11. 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.

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

  13. Input the DTC: P26CA14.

  14. 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 [D] again.

WIRING DIAGRAM

Refer to DTC P26CA12.

Click here

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. INSPECT ECM (INTERNAL CIRCUIT)

    B006ZUJC01
    *a

    Front view of wire harness connector

    (to Engine Water Pump Assembly (Water Inlet Housing))

    1. Disconnect the engine water pump assembly (water inlet housing) connector.

    2. Turn the ignition switch to ON.

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

      Standard
      Tester Connection Condition Specified Condition
      C43-2 (SWP) - Body ground Ignition switch ON Resistance fluctuates*

      Tech Tips


      • *: When the connector of the engine water pump assembly is disconnected, the ECM will enter fail-safe mode. When the ECM is in fail-safe mode, a continuous duty signal will be output and the resistance will fluctuate as the transistor inside the ECM is turned on an off.

      • If the resistance fluctuates while the ECM is in fail-safe mode after the connector of the engine water pump assembly is disconnected, it can be determined that the transistor is operating.

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

      • If the resistance fluctuates after turning the ignition switch ON, it can be determined that the ECM is in fail-safe mode.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ECM Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (ENGINE WATER PUMP ASSEMBLY (WATER INLET HOUSING) - ECM)


    1. Disconnect the engine water pump assembly (water inlet housing) 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
      C43-2 (SWP) - C57-50 (WPO) Always Below 1 Ω
      C43-2 (SWP) or C57-50 (WPO) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ENGINE WATER PUMP ASSEMBLY (WATER INLET HOUSING) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR