1991-1997 Lexus GS300 Service Manual
1,559 Pages • 39.40 MB • Instant, Printable PDF
Lexus Models Covered & Key Technical Specifications
Models: Lexus GS300
Model Years: 1991–1997
Technical Data:
- Refrigerant charge volume: 850 ± 50 g (29.92 ± 1.76 oz.)
- Normally functioning refrigeration system (low pressure): 0.15–0.25 MPa (1.5–2.5 kgf/cm²)
- Normally functioning refrigeration system (high pressure): 1.37–1.57 MPa (14–16 kgf/cm²)
- Standard idle speed (clutch not engaged): Approx. 700 rpm
- Standard idle speed (clutch engaged): Approx. 800 rpm
- Compressor lock sensor resistance (at 20°C / 68°F): 1050 – 570 ohms
Lexus Manual Features & Content Preview
- Provides factory-level diagnostic and inspection procedures specifically for the 1991–1997 Lexus GS300 A/C control systems and mechanical components.
- Contains official OEM circuit wiring diagrams, terminal standard value tables, and component-specific troubleshooting charts.
- Features 1,559 pages of technical content, including exploded-view assembly illustrations, system-specific flow charts for DTCs, and precise torque specifications.
Diagnostic Framework and System Coverage
When tracking down intermittent electrical gremlins or servicing the climate control assembly, guesswork costs flat-rate hours. This factory reference provides the exact diagnostic troubleshooting hierarchy used by dealership technicians. You get direct access to systematic workflows for customer problem analysis, diagnostic trouble code retrieval, and advanced symptom simulation. The manual explains how to use heat, vibration, and moisture methods to accurately replicate elusive, intermittent faults.
It thoroughly details the circuit inspection logic for the A/C control assembly. Technicians will find pinpoint diagnostic data for ambient, room, evaporator, and engine coolant temperature sensors.
Reference Values and Technical Specifications
Accurate reference values are non-negotiable for precise vehicle maintenance. This publication delivers comprehensive system specifications, ranging from the 10 Nm (7 ft-lbf) tightening torque for compressor suction and discharge tubes to standard operating voltages for A/C control assembly terminals.
Pinout-specific data for signal inputs, such as solar sensors and damper position sensors, is clearly mapped out. You will also find documented coolant temperature sensor resistance values across critical temperature thresholds to assist in verifying component health.
Always verify diagnostic parameters safely. The specifications provided in this OEM reference serve as the baseline for professional inspection, and qualified technicians must exercise standard workshop safety protocols when utilizing these system values for any hands-on maintenance.
Customer Reviews
Read what our customers say about this Lexus Car manual and share your own experience.