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TRAC Indicator Light Malfunction (GS300)

CAUTION: If ECU replacement is instructed in following testing, always ensure ECU connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECU malfunction.

Inspect TRAC indicator light circuit. See TRAC INDICATOR LIGHT CIRCUIT. Repair as needed. If circuit is okay, replace TRAC ECU.

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