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General Information: Notes

A large number of ECU controlled systems are used in the LEXUS GS430/GS300. In general, the ECU controlled system is considered to be a very intricate system requiring a high level of technical knowledge and expert skill to troubleshoot. However, the fact is that if you proceed to inspect the circuits one by one, troubleshooting of these systems is not complex. If you have adequate understanding of the system and a basic knowledge of electricity, accurate diagnosis and necessary repair can be performed to locate and fix the problem.

The troubleshooting procedures

TROUBLESHOOTING SYSTEM PAGE SPECIFICATION

System Action
  1. Engine 2JZ - GE
 SELF-DIAGNOSTICS
  1. Engine 3UZ - FE
 SELF-DIAGNOSTICS
  1. Automatic Transmission 2JZ-GE
 AUTOMATIC TRANSMISSION (2JZ-GE) - DIAGNOSTICS
  1. Automatic Transmission 3UZ-FE
 AUTOMATIC TRANSMISSION (3UZ-FE) - DIAGNOSTICS
  1. ABS & Hydraulic Brake Booster Power Supply System
 POWER SOURCE
  1. Vehicle Stability Control (VSC) & Brake Assist (BA) System
 VEHICLE STABILITY CONTROL (VSC) & BRAKE ASSIST (BA) SYSTEM - DIAGNOSTICS
  1. Power Tilt and Power Telescopic Steering Column
 POWER TILT & POWER TELESCOPIC STEERING COLUMN
  1. Supplemental Restraint System
 AIR BAG RESTRAINT SYSTEMS
  1. Power Seat Control System
 POWER SEAT CONTROL SYSTEM
  1. Cruise Control System
 CRUISE CONTROL SYSTEM
  1. Engine Immobilizer System
 ENGINE IMMOBILIZER SYSTEM
  1. Combination Meter System
 INSTRUMENT PANEL - TROUBLESHOOTING
  1. Sliding Roof System
 SLIDING ROOF
  1. Body No. 1 Control System
 BODY ECU NO. 1 CONTROL SYSTEM OPERATION CHECK
  1. Body No. 2 Control System
 BODY ECU NO. 2 CONTROL SYSTEM OPERATION CHECK
  1. Driver Door Control System
 DRIVER DOOR CONTROL SYSTEM (DIAGNOSTICS)
  1. Passenger Door Control System
 PASSENGER DOOR CONTROL SYSTEM (DIAGNOSTICS)
  1. Rear Left Door Control System
 LEFT REAR DOOR CONTROL SYSTEM (DIAGNOSTICS)
  1. Rear Right Door Control System
 RIGHT REAR DOOR CONTROL SYSTEM (DIAGNOSTICS)
  1. Multiplex Communication System
 MULTIPLEX COMMUNICATION SYSTEM
  1. LEXUS Navigation System
 LEXUS NAVIGATION SYSTEM (DIAGNOSTICS)
  1. Air Conditioning System
 AIR CONDITIONING SYSTEM DIAGNOSTIC
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