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Home >> Lexus >> 2007 >> LX 470 >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning >> Air Conditioning System >> DTC 22 Compressor Lock Sensor Circuit >> Description

DTC 22 Compressor Lock Sensor Circuit: Description

This sensor sends 1 pulse per engine revolution to the ECM.

If the number ratio of the compressor speed divided by the engine speed is smaller than a predetermined value, the ECM turns the compressor OFF. The indicator flashes at about 1 second intervals.

DTC TROUBLE DETECTION CONDITION

DTC No. Detection Item Trouble Area
22 All conditions below are detected for 3 seconds or more
  1. Engine speed: 450 rpm or more
  2. Ratio between engine and compressor speed deviates 20% or more in comparison with normal operation
  • Compressor lock sensor
  • Compressor
  • ECM
  • Harness or connector between compressor lock sensor and ECM
  • Harness or connector between ECM and A/C amplifier
  • A/C amplifier
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