System Testing: Notes

2004 Lexus GS 300SECTION Notes
SYSTEM INDEX

Symptom Perform Test
Malfunction In ECU A 
ABS Warning Light Circuit B 
Brake Warning Buzzer Circuit C 
Brake Warning Light Circuit D 
Deceleration Sensor Check E 
Speed Sensor Signal Check F 
Tc Terminal Circuit G 
TS Terminal Circuit H 
RENDER: 1.0x

NO RELATED

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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.