Indicator Light Circuit

Verify ATS indicator light operation. See INDICATOR LIGHT under COMPONENT TESTS. Turn ignition switch to OFF position. Disconnect ATS ECU connectors. Check for continuity between ground and ATS ECU connector "A" terminal No. 12 (Violet wire). If continuity does not exist, repair open in indicator light circuit harness or connectors. If continuity exists, check ATS ECU. See PIN VOLTAGE TESTS . If found to be defective, replace ATS ECU and retest system.

NOTE: Indicator light circuit includes Light Emitting Diode (LED). If circuit shows no continuity, reverse positive and negative leads and retest circuit.