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Home >> Infiniti >> 2012 >> FX50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 162 (Power Control System -- FX35/FX50) >> Power Distribution System >> DTC/Circuit Diagnosis >> DTC B2553: Ignition Relay >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

WARNING: This page is about a different car, the 2011 Infiniti FX50 and 2011 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION LOGIC CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2553 IGN POWER CIRCUIT BCM detects a difference of signal for 2 seconds or more between the following information.
  • Ignition relay (fuse block) ON/OFF operation
  • Ignition relay (fuse block) feedback.
  • Harness or connectors (Ignition relay feedback circuit is open or short)
  • Fuse
  • Ignition relay
  • IPDM E/R