LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> ES 350 >> Repair and Diagnosis >> Engine Mechanical >> Starter >> Starting >> Smart Access System With Push-Button Start >> DTC B2272 Ignition 1 Monitor Malfunction >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B2272 Ignition 1 Monitor Malfunction: Description

This DTC is output when there is a problem in the IG1D output circuit, which is from the inside of the main body ECU to the IG1 relay.

HINT:

When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobilizer system (See REGISTRATION ).

DTC DETECTION CONDITION AND TROUBLE AREA

DTC No. DTC Detection Condition Trouble Area
B2272 IG1 relay actuation circuit inside main body ECU or other related circuit is malfunctioning
  • Main body ECU
  • IG1 relay
  • Wire harness or connector
scientia non olet · About LEMON Manuals