GS 300 RWD V6-3.0L (3GR-FSE) (2006)
2. Disconnect the ECU connector. Check the ground terminal on the ECU side and wire harness side for bending, corrosion or foreign matter.
Lastly, check the contact pressure of the female terminals.
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
When a "Normal" code is output during a DTC check but the problem is still occurring, use the Problem Symptoms Table. The suspected areas (circuits
or parts) for each problem symptom are in the table. The suspected areas are listed in order of probability. A description of each of the chart's columns is
as given.
HINT: In some cases, the problem is not detected by the diagnostic system even though a problem symptom is present. It is possible that the problem is
occurring outside the detection range of the diagnostic system, or that the problem is occurring in a completely different system.
Symptom Confirmation and Diagnostic Trouble Codes
SYMPTOM CONFIRMATION AND DIAGNOSTIC TROUBLE CODE
HINT: The diagnostic system in the LEXUS GS430 / 300 has various functions.
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The first function is the Diagnostic Trouble Code (DTC) check. A DTC is a code stored in the ECU memory whenever a malfunction in the signal
circuits to the ECU occurs. In a DTC check, a previous malfunction's DTC can be checked by a technician during troubleshooting.
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Another function is the Input Signal Check, which checks if the signals from various switches are sent to the ECU correctly.