2000 Lexus GS300, GS400 Service Manual (P/N RM718U)

• Document identity and coverage: A 1,111-page PDF carrying manual number RM718U on its 2000 Lexus GS300/GS400 pages. Coverage is for the 2000 model year, not a 1998-2005 manual set.
• 2JZ-GE engine repair: Covers engine removal and installation, timing-belt service, valve-clearance adjustment, and cylinder-head and cylinder-block teardown, inspection, and reassembly, backed by base-engine test procedures.
• Transmission and driveline work: Includes automatic-transmission removal and installation for 2JZ-GE and 1UZ-FE applications, plus torque-converter, valve-body, shift-control, propeller-shaft, rear-drive-shaft, and differential procedures.
• Brake, steering, and suspension service: Details hydraulic brake-booster testing and repair, brake bleeding, caliper and speed-sensor work, steering-gear overhaul, power-steering checks, wheel alignment, hubs, control arms, and shock absorbers.
• Body electrical and SRS coverage: Provides component locations, terminal inspections, symptom tables, and fault isolation for power windows, locks, immobilizer, theft deterrent, lighting, meters, seats, and audio, plus SRS handling and replacement requirements.
• Cooling and climate-control procedures: Covers radiator, thermostat, water pump, cooling fans, refrigerant diagnosis and charging, compressor and clutch, condenser, HVAC cases, blower, servomotors, sensors, and both Electrical Multi Vision and standard A/C controls.
• Factory reference support: Includes exploded views, system schematics, test charts, numbered SST listings, torque tables, capacities, pressure-test specifications, adjustment data, inspection limits, and electrical test values.

The manual uses the factory's task-heading and illustration format and is aimed at the experienced technician. It assumes familiarity with scan tools, precision measurement, press work, refrigerant service equipment, and Toyota/Lexus special service tools.

Engine and Drivetrain Repair Depth

The 2JZ-GE chapters go beyond routine maintenance. Cylinder-head coverage includes camshaft and valve removal, warpage and wear inspection, valve-guide and seat work, reassembly, and installation. The block section covers pistons, rods, crankshaft, bearings, oil clearances, bore inspection, and final assembly. Separate SFI and emissions material addresses the fuel pump and ECU, injectors, throttle body, ACIS, camshaft-timing oil-control valve, airflow and temperature sensors, EVAP, PCV, and catalysts.

Automatic-transmission coverage includes unit removal and installation for both engine configurations, shift-control hardware, the ATF temperature sensor, extension-housing seal, on-vehicle valve-body repair, and torque-converter/drive-plate inspection. It does not contain a complete internal transmission teardown and rebuild. Driveline sections add propeller-shaft joint-angle checks, rear-drive-shaft service, differential carrier disassembly, bearing and washer selection, backlash and preload adjustment, and tooth-contact inspection.

Chassis, Electrical, and HVAC Systems

Brake material centers on the hydraulic brake booster and its accumulator, pump, actuator, solenoids, pressure checks, and SST-assisted bleeding. Steering coverage includes fluid-pressure testing, the 2JZ-GE vane pump, rack-and-pinion disassembly, progressive power steering, and the power tilt/telescopic column. Suspension chapters handle alignment, hubs and bearings, drive shafts, control arms, and shock absorbers.

Body electrical pages combine component locations, connector-terminal tests, ECU value tables, problem-symptom tables, and targeted flow charts. Diagram examples include the power-window jam-protection Flow Charts A and B, the emission-control Parts Layout and Schematic Drawing, A/C location and refrigerant-line views, the 2JZ-GE timing-belt component view, and the differential tooth-contact pattern chart. SRS coverage addresses the steering-wheel pad and spiral cable, passenger and side airbags, sensors, and associated harnesses.

Tools, Specifications, and Repair Cautions

Preparation tables identify SSTs by name and number, including the Air Conditioner Service Tool Set 07110-58060, Valve Spring Compressor 09202-70020, Toyota Automatic Transmission Tool Set 09350-30020, and ABS Actuator Checker and Sub-harness 09990-00150. Service-specification pages consolidate engine limits, transmission shift and stall data for both engine applications, chassis alignment and preload data, brake and steering tests, A/C service data, and fastener torques.

The timing-belt section flags a specific 2JZ-GE repair trap: with the belt disengaged, an incorrect crankshaft position can allow piston-to-valve contact while the camshaft pulleys are removed. During differential repair, pinion preload cannot be corrected by backing off the flange nut; an over-compressed spacer must be replaced or bearing preload will be wrong.

Important Scope of This PDF

This PDF does not include the separately referenced DI diagnostic, BO body-repair, or IG ignition chapters, nor the standalone Electrical Wiring Diagram publication. It also lacks the full 1UZ-FE engine-mechanical, SFI, cooling, lubrication, charging, and starting sections. Eight printed section pages are absent: BR-20, SA-27, SA-49-50, and SA-87-90. The PDF pages are also arranged in a nonnumeric sequence within each section, so use the printed identifiers when following cross-references.

A/C work requires approved refrigerant recovery equipment. SRS and hydraulic brake-booster repair also involves stored-energy hazards and must follow the manual's isolation and handling precautions.