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Home >> Cadillac >> 2007 >> CTS Base, 2.8 T, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 113 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Radio Audio Inoperative at Rear Seat Audio (RSA) Control >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Center the balance and fade adjustment on the radio.
    • If adjustment of the fade and balance eliminates the concern, review the operation of the radio with the customer.
  2. Verify that the wireless headphones are set to the proper channel and are working properly.
  3. Disconnect the J2 connector of the rear seat audio (RSA) control module. Connect a DMM between the suspect speaker output circuits (input to the RSA) from the radio. Turn ON the radio and verify there is AC voltage present.
  4. Disconnect the J1 harness connector from the RSA module. Verify that a test lamp illuminates between the RSA module B+ circuit terminal J1-5 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  5. Test for less than 1.0 ohm of resistance between the ground circuit terminal J1-6 and ground
    • If greater than the specified range, test the ground circuit for an open/high resistance.
    • If all circuits test normal, replace the RSA module.
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