{"model":"mk2","model_name":"MK2 Supra","vehicle":"Toyota Supra A60 (1982–1986, 5M-GE)","document":"Repair Manual","section":"AC","section_name":"Air Conditioning System","page":3,"pages_in_section":42,"title":"Troubleshooting (Cont'd)","section_header":"Air Conditioning System — Troubleshooting","ocr_text":"TROUBLESHOOTING (Cont'd)\n\nSymptom | Possible causes | Checks and corrections | Page\n\nNo blower control | Defective water temperature relay | Check for open | AC-9\n | Defective heat mode switch | Check for short | AC-9\n | Defective water temperature switch | Check for short | AC-20\n | Defective Hi-speed relay | Check for short | AC-9\n | Defective wiring connection | Check and repair | AC-9\n | Defective vacuum circuit | Check for leak and repair | AC-16\n\nInterior temperature does not lower | Blown fuse or circuit breaker | Replace | AC-9\n | Defective magnetic clutch | Check and repair | AC-23\n | Defective compressor | Check and repair | AC-23\n | Defective pressure switch | Replace | AC-9\n | Defective expansion valve | Replace | AC-4\n | Defective EPR | Replace | AC-4\n | Insufficient refrigerant in system | Check and charge refrigeration system | AC-11\n | Defective A/C switch | Check for short or open | AC-9\n | Defective temperature sensors (in-car sensor, ambient sensor) | Check for short | AC-19\n | Defective rheostat | Check for short | AC-9\n | Defective power servo unit | Check operation | AC-17\n | Defective DVV | Check operation | AC-20\n | Defective amplifier | Check operation |\n | Defective condenser motor | Check operation | AC-21\n | Defective A/C relay | Check operation | AC-9\n | Defective wiring connection | Check and repair | AC-9\n | Defective vacuum circuit | Check for leak and repair | AC-16\n\nInterior temperature does not rise | Defective water valve | Check operation |\n | Defective temperature sensors (in-car sensor, ambient sensor) | Check for open | AC-19\n | Defective rheostat | Check for open | AC-9\n | Defective power servo unit | Check operation | AC-17\n | Defective DVV | Check operation | AC-20\n | Defective amplifier | Check operation |\n | Defective wiring connection | Check and repair | AC-9\n | Defective vacuum circuit | Check for leak and repair | AC-16\n\nUnstable operation (hunting) | Defective vacuum circuit | Check for leak and repair | AC-16\n | Poor connection of rheostat | Check and repair | AC-9\n | Defective power servo unit | Check operation | AC-17\n | Defective DVV | Check operation | AC-20\n | Defective amplifier | Check operation |\n | Poor connection in wire | Check and repair | AC-9\n\nImproper shifting of dampers | Misadjusted control lever or rod | Check and repair | AC-9\n | Disconnected control wire | Check and repair | AC-19\n | Defective dampers | Check and repair 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transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}