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DTC B1422/22 Compressor Lock Sensor Circuit: Description

This sensor sends 4 pulses 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. Then the A/C indicator flashes at about 1 second intervals.

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
B1422/22 All conditions below are detected for 3 sec. or more:
  1. Engine speed: 450 rpm or more
  2. Ratio between engine and compressor speed deviates 20% or more in comparison to normal operation
  • Cooler compressor
  • Cooler compressor drive belt
  • Magnet clutch (Lock sensor)
  • Wire harness
  • Multiplex communication circuit ECM
  • A/C amplifier (A/C control)
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