Reading and Clearing Diagnostic Trouble Codes

Fig. 52 Self Diagnosis Check Connector:

Fig 53 Diagnosis Display Patterns & Output Codes:

Self diagnosis checking is performed when there is has been an automatic cancellation, without cancel switch operation. Test for diagnostic codes as follows, then refer to the appropriate check chart, refer to CHECK CHARTS.
1. Connect a voltmeter between ground terminal and terminal for auto cruise control of diagnosis check connector.
2. Read voltmeter needle deflections to identify probable cause.
3. When diagnosis code No. 11, 12, 15 or 16 is displayed, check by referring to check chart applicable to that number.