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Home >> Infiniti >> 2012 >> M37 Base >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Security Control System (With Intelligent Key System) >> DTC/Circuit Diagnosis >> DTC B2603: Shift Position >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

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 position signal from TCM: approx. 0 V
  • A/T shift selector (detention switch) signal: approx. 0 V
  • Harness or connector

    A/T shift selector (detention switch) circuit is open or shorted.]

  • Harness or connectors

    (TCM circuit is open or shorted.)

  • A/T shift selector (detention switch)
  • A/T assembly (TCM)
  • BCM
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