Matrix Chart Of Problem Symptoms
If a normal code is displayed during DIAGNOSTIC CODE CHECK but the trouble still occurs, test circuits for each symptom by testing code/items listed in numerical order given in Fig 1. See TESTING in this article.
If the instructions "go to next inspection item shown on matrix chart" are given in TESTING procedure(s), inspect next highest numbered item listed. If the trouble still occurs but there are no abnormalities in any of the circuits, check or replace cruise control ECU as the last step.