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Home >> Lexus >> 2000 >> SC 400 >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic A/C-Heater Systems >> Diagnostic Tests >> DTC 22: Compressor Lock Sensor Circuit >> Sensor Resistance Test

Sensor Resistance Test

  1. Unplug compressor lock sensor connector, located at compressor. Measure resistance between sensor terminals at specified temperatures. See COMPRESSOR LOCK SENSOR RESISTANCE SPECIFICATIONS  table.
  2. If resistance is not as specified, replace sensor. If resistance is within specification, inspect wiring harness and connectors between sensor and A/C-heater control panel. Repair as necessary. If wiring harness and connectors are okay, temporarily substitute a known-good A/C-heater control panel, then retest system.
COMPRESSOR LOCK SENSOR RESISTANCE SPECIFICATIONS

Sensor Temperature - °F (°C) Ohms
77 (25) 170-220
212 (100) 210-290
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