1990-1993 Lexus LS400, ES250/300, SC300/400 Service Manual
Comprehensive repair and technical service information covering the 1990-1993 Lexus LS400, ES250/300, and SC300/400 models. Ref: AC001-98
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Models Covered & Key Technical Specifications
Lexus LS 400, ES 250, ES 300, SC 300 & SC 400 (AC001-98) - 1990-1993
The applied reference vault | applied segment.
- Reference Power Draw: 10-14V signifies the standard operating voltage range.
- Integral Ambient Limits: For optimal operation, 25°C (77°F) defines the ambient temperature limit.
- General Feed Speed: 2000 rpm achieves the target engine speed for A/C operation.
- Certified DPI Rating: The wiring harness requires 1 MΩ or higher for proper circuit continuity.
- Factory Volume Data: 950 ± 50 g represents the standard refrigerant charge volume.
- Established Circuit Specs: Below 1V determines the voltage for the manual magnetic clutch.
Professional Workshop Service Manual & Technical Specifications
Authoritative Factory Technical Manual: Lexus LS 400, ES 250, ES 300, SC 300 & SC 400 - Comprehensive Repair Manual & Technical Service Information Guide 1990-1993 Transmission-Guide
Model-Designation: 1990-1993 Lexus LS400, ES250/300, SC300/400 // Engine-Type: Air Conditioning System // Reference-Category: Technical Manual. Methodically calling for... Service sections detail...
| Integrated-Framework | Value | Context |
|---|---|---|
| Air Conditioning System | AC001-98 | Technical Service Bulletin |
| Repair Procedures | Page 3 | Detailed steps for component service |
| Troubleshooting | Page AC-21 | Diagnostic procedures and solutions |
| Parts Information | Page 1 | Required parts for retrofit |
| Refrigerant Charge | 950 ± 50 g | Specified refrigerant volume |
The microprocessor controlled automatic air conditioner is a system which controls the cabin air conditioning automatically using a microcomputer. The microcomputer senses the air temperature outside and inside the cabin, the amount of sunlight, the compressor operating condition and temperature setting, etc. and maintains the optimum blower air temperature and air flow at the intakes and outlets automatically. The document includes coverage of various diagnostic codes and troubleshooting procedures. Repair information is provided for specific components and systems within the air conditioning unit. Verification procedures are included for checking system performance and component functionality.
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