Service Interval Indicator

System must be reset using Service Interval Switch Reset Tool (62 1 100). If tool is not available, reset by grounding terminal No. 7 of the Diagnostic Connector. Use a test light probe, and ground circuit through test bulb. Turn ignition switch to "ON" position when resetting. BEFORE RESETTING, use an ohmmeter to check that terminal No. 7 (Blue/White wire), has 5 volts with ignition on.