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Home >> Infiniti >> 2017 >> Q50 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 428 (Security Control System (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC B26F4: Starter Control Relay >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC PRIORITY 

    If DTC B26F4 is displayed with DTC U1000, or U1010 first perform the trouble diagnosis for DTC U1000, or U1010.

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable. U1000: Refer to DTC Description . U1010: Refer to DTC Description .

    NO

    GO TO 2.

  2. CHECK DTC OF IPDM E/R 

    Check DTC in "Self Diagnostic Result" mode of "IPDM E/R" using CONSULT.

    Is DTC detected?

    YES

    Perform the diagnosis procedure related to the detected DTC. Refer to DTC Index .

    NO

    GO TO 3.

  3. REPLACE BCM 

    Replace BCM. Refer to Removal and Installation .

    INSPECTION END

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