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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Door & Lock (DTC/Circuit Diagnosis) (Except Hybrid)) >> DTC/Circuit Diagnosis >> DTC B2401: Ignition Power Supply Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK BCM OUTPUT SIGNAL

    1. Select IPDM E/R using CONSULT.
    2. Select IGN RLY1-REQ in DATA MONITOR mode.
    3. Check that the function operates normally according to the following conditions.
    Monitor item Condition Status
    IGN RLY1-REQ Ignition switch ON On
    OFF Off

    Is the inspection result normal?

    YES 

    Replace automatic back door control module. Refer to REMOVAL AND INSTALLATION .

    NO 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .