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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Theft Deterrent / Keyless Entry) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function) >> DTC B2272: Ignition 1 Monitor Malfunction >> Description

DTC B2272: Ignition 1 Monitor Malfunction: Description

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

This DTC is output when there is a problem in the IG1 output circuit, which is from the inside of the power source control ECU to the RH-IG or LH-IG relay.

HINT.

When the power source control 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.

DTC DESCRIPTION CHART

DTC No. DTC Detection Condition Trouble Area
B2272 IG1 relay actuation circuit inside power source control ECU or other related circuit is malfunctioning
  • Main body ECU RH (cowl side junction block RH)
  • Main body ECU LH (cowl side junction block LH)
  • Power source control ECU
  • Wire harness or connector
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