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Home >> Lexus >> 1990 >> LS 400 V8-4.0L (1UZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures
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Symptom Related Diagnostic Procedures

Diagnosis By Symptom Pg. 1 Of 2:




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Diagnosis By Symptom Pg. 2 Of 2:




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If fault codes are not present or malfunctions cannot be confirmed, refer to chart for system inspection. Inspect listed items in numerical order.


If diagnostic chart points to "Engine mechanical and others". Refer to the following chart.

Diagnosis By Symptom - Mechanical:




Engine Mechanical Diagnosis by Symptom