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Home >> Lexus >> 2004 >> IS 300 Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Air Conditioning System (Diagnosis)) >> Circuit Inspection >> DTC B1412 Ambient Temperature Sensor Circuit >> Circuit Description
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Circuit Description

WARNING: This page is about a different car, the 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

This sensor detects the ambient temperature and sends the appropriate signals to the A/C amplifier.

DTC - B1412 TROUBLE DETECTION REFERENCE

DTC No. Detection Item Trouble Area
B1412 Open or short in ambient temperature sensor circuit.
  • Ambient temperature sensor.
  • Harness or connector between ambient temperature sensor and engine ECM.
  • Harness or connector between ECM and A/C amplifier.
  • ECM.
  • A/C amplifier.
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