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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X315 I/P to console harness connector.
  2. Test for 900-1100 Ω between the audio common signal circuit I/P side connector terminal 5 and ground.
    • If less than specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the radio.
    • If greater than specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the radio.
  3. Ignition ON, radio ON, test for less than 4.5-5.5 V between the auxiliary detection circuit I/P side connector terminal 8 and ground.
    • If less than specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
    • If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the radio.
  4. Install a 3 A fused jumper between the X315 I/P side connector terminals 8 and 5. Verify the infotainment system to switches AUX as the audio source.
    • If the infotainment system does not switch to AUX as the audio source, replace the radio.
  5. Ignition OFF, disconnect the X1 connector at the radio. Test for infinite resistance between the control circuits listed below and ground:
    • left auxiliary audio circuit terminal 24
    • right auxiliary audio circuit terminal 10
    • If not the specified value, test the signal circuit for a short to ground.
  6. Test for less than 5 Ω between the radio X1 terminal 24 and the X315 I/P harness side terminal 6.
    • If greater than the specified value, test the signal circuit for an open/high resistance.
  7. Test for less than 5 Ω between the radio X1 terminal 10 and the X315 I/P harness side terminal 7.
    • If greater than the specified value, test the signal circuit for an open/high resistance.
  8. If all circuits test normal, replace the auxiliary audio jack/harness assembly and reconnect all harness connectors. Connect and operate the portable audio playback device. If audio cannot be heard from the device, replace the radio.
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