Problem Symptoms Table
WARNING: This page is about a different car, the 2004 Lexus GS 430 and 2004 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
Perform troubleshooting of the circuits for the applicable problem in the order given in the chart below. Proed to the page located for each circuit.
HINT:
- If the instruction "Proceed to next circuit inspection shown problem symptoms table" is given in the flow chart for each circuit, proceed to the circuit with the next highest number in the table to continue the check.
- If the trouble still reappears even through there are no abnormalities in any of the other circuits, then check and replace the Power Seat Position ECU as the last step.PROBLEM SYMPTOMS TABLE - POWER SEAT CONTROL SYSTEM
Symptom Suspect Area All functions do not operate. - ECU Power Source Circuit
- Power Seat Position ECU
"Slide operation" does not operate. - Slide Motor Circuit
- Power Seat Switch Circuit
- Power Seat Position ECU
"Reclining operation" does not operate. - Reclining Motor Circuit
- Power Seat Switch Circuit
- Power Seat Position ECU
"Front Vertical operation" does not operate. - Front Vertical Motor Circuit
- Power Seat Switch Circuit
- Power Seat Position ECU
"Lifter operation" does not operate. - Lifter Motor Circuit
- Power Seat Switch Circuit
- Power Seat Position ECU
Memory return function does not operate. - M1. M2 SET Switch Circuit
- Power Seat Position ECU
Memory return function operates abnormally. (Power seat) - Seat Position Sensor Circuit
- Power Seat Position ECU
Memory return function operates abnormally. (Mirror) - Mirror Position Sensor Circuit
- Door ECU (Driver or Passenger)