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Home >> Infiniti >> 2011 >> M56 Base >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 26 (Security Control System) >> DTC/Circuit Diagnosis >> DTC B2109: Steering Lock Relay >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

WARNING: This page is about a different car, the 2011 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • If DTC B2109 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to "REMOVAL AND INSTALLATION ".
  • If DTC B2109 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
  • When IPDM E/R power supply voltage is low (Approx. 7 - 8 V for about 1 second), the DTC B2109 may be detected.
DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2109 STRG LCK RELAY OFF IPDM E/R detects that steering lock relay is stuck in the OFF position for approximately 1 second even if IPDM E/R receives steering lock relay ON/OFF signal from BCM.
  • Harness or connector (CAN communication line is open or shorted.)
  • Harness or connector (Power supply circuit for steering lock relay is open or shorted.)
  • IPDM E/R
  • Battery
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