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Home >> Cadillac >> 2008 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 141 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Radio Does Not Interface with Personal Audio Link Module >> Circuit/System Testing
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Circuit/System Testing

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  1. Ignition OFF, disconnect the harness connector at the PAL module.
  2. Test for less than 5 Ω between terminal 9 and ground.
    • If greater than specified value, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between terminal 16 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
  4. Ignition OFF, reconnect the harness connector at the PAL module.
  5. Ignition ON, set the radio to the iPod® interface menu and attempt to operate audio from the iPod®.
    • If the iPod® fails to communicate with the radio, replace the interface cable.
  6. Near the BCM connector, verify the serial data circuit from PAL is properly spliced to the serial data circuit.
    • If the serial data circuit is not connected, reconnect the circuit.
  7. Ignition OFF, disconnect the PAL module and the X1 radio harness connector.
  8. Test for less than 1 Ω between terminal 9 at the X1 radio harness connector and terminal 5 at the X1 PAL module harness connector.
    • If greater than specified value, replace the T-harness.
  9. If all systems test normal, replace the PAL module.
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