For 1990-2009 cars only
Diagnostic System Check - Entertainment
Perform the Diagnostic System Check - Vehicle before proceeding with these diagnostic procedures. Refer to Diagnostic System Check - Vehicle .
Schematic Reference: Video System Schematics
Auxiliary Video Display is Poor or Blank
Important: The following information lists the most probable cause of the concern to the least probable cause, followed by the appropriate test for the condition. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with the replacement. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
| • | Auxiliary detect signal circuit open, shorted to ground, or shorted to battery positive--Test auxiliary detect signal circuit for resistance to ground with key in OFF position. With no auxiliary device connected to red RCA input jack, resistance to ground should be 270K ohms. With auxiliary device connected to red RCA input jack, resistance to ground should be 50K ohms. If resistance values are not correct, check for open, short to battery positive, or short to ground on auxiliary detect signal circuit. Refer to Circuit Testing and Wiring Repairs . |
| • | Auxiliary Control Signal circuit open or shorted to battery positive--Test the Auxiliary Control circuit from the radio for an open or a short to battery positive. Refer to Circuit Testing and Wiring Repairs . |
| • | Overhead console faulty--Test Auxiliary Detect signal circuit for resistance to ground with key in off position. With no auxiliary device connected to red RCA input jack, resistance to ground should be 270K ohms. With auxiliary device connected to red RCA input jack, resistance to ground should be 50K ohms. If resistance values are not correct, check for open, short to battery positive, or short to ground on auxiliary detect signal circuit. Replace overhead console. |
| • | Radio faulty--Replace radio. Refer to Radio Replacement . |
