LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2014 >> Q60 IPL, 2D Convertible >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Security Control System (Convertible) >> DTC/Circuit Diagnosis >> DTC B2603: Shift Position >> 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 "DTC LOGIC ".
  • If DTC B2603 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to "DTC LOGIC ".
  • If DTC B2603 is displayed with DTC B2601, first perform the trouble diagnosis for DTC B2601. Refer to "DTC LOGIC ".
DTC No. Self-diagnosis name DTC detecting condition Possible causes
B2603 SHIFT POSI STATUS BCM detects the following status for 500 ms or more when shift is in the P position, and ignition switch is in the ON position.
  • Transmission range switch: approx. 0 V
  • A/T shift selector (detention switch): approx. 0 V
  • Harness or connector (A/T shift selector circuit is open or shorted)
  • Harness or connectors (TCM circuit is open or shorted)
  • A/T shift selector (detention switch)
  • TCM