SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P26AC11, P26AC15

DTC Code DTC Name
P26AC11 Engine Coolant Bypass Valve "B" Circuit Short to Ground
P26AC15 Engine Coolant Bypass Valve "B" Circuit Short to Battery or Open

DESCRIPTION

The flow shutting valve (for ATF control) used for the variable cooling system is a magnet type valve that is closed when the engine is warming up to prevent coolant from flowing through the A/T cooler passage which reduces engine warm up time.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P26AC11 Engine Coolant Bypass Valve "B" Circuit Short to Ground

All of the following conditions are met (1 trip detection logic).


  • An open signal is being sent from the ECM to the flow shutting valve (for ATF control).

  • Current operating state and target operating state differ for 3 seconds or more continuously.

  • Open or short in flow shutting valve (for ATF control) (No. 1 water by-pass hose) circuit

  • Flow shutting valve (for ATF control) (No. 1 water by-pass hose)

  • ECM

 Comes on DTC stored SAE Code: P26AD
P26AC15 Engine Coolant Bypass Valve "B" Circuit Short to Battery or Open

All of the following conditions are met (1 trip detection logic).


  • A close signal is being sent from the ECM to the flow shutting valve (for ATF control).

  • Current operating state and target operating state differ for 3 seconds or more continuously.

  • Open or short in flow shutting valve (for ATF control) (No. 1 water by-pass hose) circuit

  • Flow shutting valve (for ATF control) (No. 1 water by-pass hose)

  • ECM

 Comes on DTC stored SAE Code: P26AE
Related Data List
DTC No. Data List

P26AC11

P26AC15

 Coolant Temperature
Coolant Water Route Switching Valve 2

MONITOR DESCRIPTION

If the ignition switch ON or the engine is running and the current operating state and target operating state of the flow shutting valve (for ATF control) do not match, the ECM determines that there is an open or short in the flow shutting valve (for ATF control) circuit and stores a DTC.

MONITOR STRATEGY

Required Sensors/Components Engine coolant bypass valve (for ATF control)
Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN

Tech Tips

Make sure to perform this procedure when the engine coolant temperature is between 5 and 40°C (41 and 104°F) and the difference between the engine coolant temperature and intake air temperature is within 10°C (18°F) or less.


  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. Enter the following menus: Powertrain / Engine / Active Test / Activate the Coolant Water Route Switching Valve 2 [B].

  9. Perform the Active Test Activate the Coolant Water Route Switching Valve 2, select "Close" and wait for 3 seconds or more [C].

  10. Perform the Active Test Activate the Coolant Water Route Switching Valve 2, select "Open" and wait for 3 seconds or more [D].

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

  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: P26AC11 or P26AC15.

  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 is malfunctioning.

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

WIRING DIAGRAM

B006ZL5E11

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. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FLOW SHUTTING VALVE (FOR ATF CONTROL))

    B006Y9YC03
    *a

    Front view of wire harness connector

    (to Flow Shutting Valve (for ATF Control) (No. 1 Water By-pass Hose))

    1. Disconnect the flow shutting valve (for ATF control) (No. 1 water by-pass hose) connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      j1-2 - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - FLOW SHUTTING VALVE (FOR ATF CONTROL))

    OK

  2. INSPECT FLOW SHUTTING VALVE (FOR ATF CONTROL) (NO. 1 WATER BY-PASS HOSE)


    1. Inspect the flow shutting valve (for ATF control) (No. 1 water by-pass hose).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FLOW SHUTTING VALVE (FOR ATF CONTROL) (NO. 1 WATER BY-PASS HOSE) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (FLOW SHUTTING VALVE (FOR ATF CONTROL) - ECM)


    1. Disconnect the flow shutting valve (for ATF control) (No. 1 water by-pass hose) 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
      j1-1 - C57-41 (WSV2) Always Below 1 Ω
      j1-1 or C57-41(WSV2) - 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