1997-2001 Lexus GS 300, GS 400 Air Conditioning System Service Manual

Lexus GS 300 / GS 400 1997–2001 Air Conditioning System Reference

• This manual covers the 1997–2001 Lexus GS 300 and GS 400 air conditioning and heating system, specifically detailing components, evacuation, and charging procedures for the factory climate control setup.
• Official Lexus publication RM718U, 2000 edition.
• Includes 12 exploded-view component diagrams with torque specifications, 6 electrical test parameter tables, and 9 diagnostic symptom charts for system troubleshooting.
• Accessible from your device as soon as the order is placed.
• Suitable for printing individual sections for shop-floor use.
• This document is the authorized reference for servicing the 1997–2001 Lexus GS 300 and GS 400 climate control suite, providing precise fluid capacities, fastener torque values, and sensor test parameters.

System Documentation and Layout

This publication organizes the climate control and floor-shift systems into clear, modular sections. The documentation details the refrigerant lines, evaporator unit, condenser assembly, and blower motor, providing component-level breakdown images that identify mounting hardware and service connections. Additionally, the manual contains procedural outlines for discharging, evacuating, and charging the refrigeration system, along with specific guidance on component removal and reassembly for the instrument panel, console box, and air ducts.

Specifications and Diagnostic Data

The Lexus GS 300/400 service manual includes essential technical data for component verification and system testing. Refrigerant volume for the system is documented at 600 ± 50 grams. The expansion valve to evaporator connection is specified at 4.1 Nm in the assembly data. Compressor mounting hardware requires 10 Nm for secure fitting per the factory specification table. Magnetic clutch clearance is verified at 0.5 ± 0.15 mm, with shims available for adjustment. The compressor lock sensor resistance is listed at 570–1,050 ohms at 20°C in the diagnostic tables. Consult what an OEM service publication covers for structured insights into factory maintenance standards. Reference only — always consult a certified technician before performing service on this equipment. This 100-page Lexus OEM service publication covers the 1997–2001 GS 300 and GS 400, documenting air conditioning and shift-lock electrical specifications, component locations, and maintenance parameters for the RM718U model year series.