LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2010 >> FX35 AWD >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Security Control System >> Component Diagnosis >> DTC B2603: Shift Position Status >> DTC Logic >> DTC Detection Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Detection Logic

NOTE:
  • If DTC B2603 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to BCM: DTC LOGIC .
  • If DTC B2603 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to BCM: DTC LOGIC .
DTC DETECTION LOGIC TABLE

DTC Self-diagnosis name DTC detecting condition Possible causes
B2603 SHIFT POSITION STATUS BCM detects the followings status for 500 ms or more when shift is in the P position, and ignition switch is in the ON position.
  • Park/neutral position (PNP) switch: approx. 0 V
  • Control device (detention switch): approx. 0 V
  • Harness or connector

    (Control device circuit is open or shorted)

  • Harness or connectors

    [Park/neutral position (PNP) switch circuit is open or shorted]

  • Control device (detention switch)
  • Park/neutral position (PNP) switch
  • BCM