LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2017 >> Corolla SE, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Control System (2ZR-FAE) - Diagnostic Codes (2 Of 8) (Model Code: ZRE172)) >> SFI System >> DTC P104A: VALVEMATIC SDOWN Circuit [08/2016 - ] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P104A: VALVEMATIC SDOWN Circuit [08/2016 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK ANY OTHER DTCS OUTPUT 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    5. Read the DTCs.

      Powertrain > Engine and ECT > Trouble Codes 

      Result

      Result Proceed to
      DTC P104A is output A
      DTC P1049 is output at same time as DTC P104A B

    Result:  2

    B 

    GO TO DTC CHART:  DIAGNOSTIC TROUBLE CODE CHART [08/2016 - ] 

    Result:  1

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (CONTINUOUSLY VARIABLE VALVE LIFT CONTROLLER ASSEMBLY - ECM) 
    1. Disconnect the continuously variable valve lift controller 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
      B40-3 (SDWN) - B33-49 (SDWN) Always Below 1 Ω
      B40-3 (SDWN) or B33-49 (SDWN) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE ECM. Refer to  REMOVAL [08/2016 - ] 

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

scientia non olet · About LEMON Manuals