LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2012 >> M35h >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0500 To P31A5 >> DTC P1290, P2100, P2103: Throttle Control Motor Relay >> DTC Logic >> DTC Detection Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Detection Logic

DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P1290 ETC MOT PWR-B2 [Throttle control motor relay circuit open (bank 2)] ECM detects a voltage of power source for throttle control motor is excessively low.
  • Harness or connectors (Throttle control motor relay circuit is (open)
  • Throttle control motor relay
P2100 ETC MOT PWR-B1 [Throttle control motor relay circuit open (bank 1)]
P2103 ETC MOT PWR (Throttle control motor relay circuit short) ECM detect the throttle control motor relay is stuck ON.
  • Harness or connectors (Throttle control motor relay circuit is shorted)
  • Throttle control motor relay