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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 41 (Engine Control System (2ZR-FXE) - Diagnostic Codes (14 Of 15)) >> SFI System >> DTC P261A-13: Coolant Pump "B" Circuit Open [04/2020 - 09/2022] >> Procedure

DTC P261A-13: Coolant Pump "B" Circuit Open [04/2020 - 09/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. INSPECT RELAY (ENG W/PMP RELAY) 
    1. Inspect the ENG W/PMP relay.

      Refer to PROCEDURE - Step 2

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE RELAY (ENG W/PMP RELAY) 

    Result: 

    OK 

    See step  2

  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ENGINE WATER PUMP ASSEMBLY) 
    GTY943191Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to Engine Water Pump Assembly)

    HINT: 

    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
      C44-1 (+B) - Body ground Power switch on (IG) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  6

    Result: 

    OK 

    See step  3

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

    HINT: 

    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
      C44-5 (PGND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  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
      C44-2 (NWP) - C77-68 (WPI) Always Below 1 Ω
      C44-4 (SWP) - C77-69 (WPO) Always Below 1 Ω
      C44-2 (NWP) or C77-68 (WPI) - Body ground and other terminals Always 10 kΩ or higher
      C44-4 (SWP) or C77-69 (WPO) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (NWP VOLTAGE) 
    GTY915361Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to Engine Water Pump Assembly)
    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
      C44-2 (NWP) - Body ground Power switch on (IG) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ENGINE WATER PUMP ASSEMBLY. Refer to  REMOVAL [04/2020 - 09/2022] 

    Result: 

    NG 

    REPLACE ECM. Refer to  REMOVAL [04/2020 - 09/2022] 

  6. 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) - C44-1 (+B) Always Below 1 Ω
      5 (ENG W/PMP relay) or C44-1 (+B) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. 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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ENG W/PMP RELAY) 
    GTY916890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *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

    Result: 

    OK 

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

    Result: 

    NG 

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

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