How to Display and Read Diagnostic Trouble Codes

DIAGNOSTIC TROUBLE CODE CHECK

When Scan Tool is used
Connect the scan tool to the data link connector then check diagnostic trouble codes.

CAUTION: Make certain that the ignition switch is OFF when the scan tool is connected or disconnected.

NOTE: If the ignition switch is ON with the scan tool connected, some of the warning lights will flash. This is because the data link connector terminal 1 is grounded and diagnostic output via warning lamp will operate. This is not an abnormal condition.