Inspection Procedure
WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
For circuit wiring diagram, see Figure.
- Check ECM.
- Insert the already registered master key into the key cylinder.
- Using an oscilloscope or hand-held tester, check that noise is included in CODE (E10-15) terminal of the ECM. See Figure and Fig 1 . Standard: No noise is detected. If there is no noise, go to the next step. If there is noise, find the cause and remove it.
- Check that the transponder key amplifier operates normally after it's replacement. If it operates normally, then the system is normal. If it does not operate normally, replace the ECM.