1997 Lexus GS 300FACTORY OEM SERVICE PROCEDURE

Control Units

CONTROL UNITS

Component Component Location
ABS ECU Behind right side of dash. See Figure.
ABS & Traction ECU Behind right side of dash. See Figure.
A/C System ECU Behind center of console, integral of A/C control assembly.
Cruise Control ECU Under center console. See Figure.
Door Lock ECU Behind left side of dash, integral of theft deterrent ECU.
Engine Control Module (ECM) Behind right side of dash. See Figure.
Fuel Pump ECU On left side of luggage compartment, behind trim panel. See Figure.
Power Steering ECU Behind left side of dash, near steering column.
Progressive Power Steering ECU Behind left side of dash, near steering column. See Figure.
Shift Lock ECU Under center console, behind gear selector. See Figure.
Theft Deterrent ECU Behind left side of dash, above junction block No. 1. See Figure.
Tilt & Power Telescopic ECU Behind left side of dash, above steering column. See Figure.
Traction ECU Behind right side of dash. See Figure.
Wireless Door Lock ECU On right side of luggage compartment.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.