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Home >> Lexus >> 1994 >> SC 400 V8-4.0L (1UZ-FE) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> Heating and Air Conditioning >> DTC 21

DTC 21








A photo diode in the solar sensor detects solar radiation and sends signals to the air conditioning control assembly.

Diagnostic Chart:




Wiring Diagram:






Inspection Procedure - Part 1:




Part 2:




Part 3:




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