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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Security Control System (DTC/Circuit Diagnosis) (Except Hybrid)) >> DTC/Circuit Diagnosis >> DTC B2603: Shift Position >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

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.
NOTE:
  • If DTC B2603 is displayed with DTC B2601, first perform the trouble diagnosis for DTC B2601. Refer to DTC LOGIC .
DTC No. Trouble diagnosis name DTC detecting condition Possible causes
B2603 SHIFT POSI STATUS BCM detects the following status when ignition switch is in the ON position.
  • P (Park) position signal from TCM: approx. 0 V
  • CVT shift selector (park position switch) signal: approx. 0 V
  • Harness or connector

    [CVT shift selector (park position switch) circuit is open or shorted.]

  • Harness or connectors

    (TCM circuit is open or shorted.)

  • CVT shift selector (park position switch)
  • CVT assembly (TCM)
  • BCM
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