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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the information center telltale assembly or rear parking assist display.
  2. Ignition ON, test for 9.0-12.5 V between the appropriate supply voltage circuit terminal listed below and ground:
    • Front - terminal 4
    • Rear - terminal A
    • If less than the specified range, test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the object alarm module.
    • If greater than the specified range, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the object alarm module.
  3. Test for less than 0.3 V between the appropriate control circuit listed below and ground:

    Front

    • Left amber LED - terminal 3
    • Center amber LED - terminal 2
    • Red LED - terminal 1

    Rear

    • Left amber LED - terminal B
    • Center amber LED - terminal C
    • Red LED - terminal D
    • If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the object alarm module.
  4. Ignition OFF, test for infinite resistance between the appropriate control circuit listed below and ground:

    Front

    • Left amber LED - terminal 3
    • Center amber LED - terminal 2
    • Red LED - terminal 1

    Rear

    • Left amber LED - terminal B
    • Center amber LED - terminal C
    • Red LED - terminal D
    • If not the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the object alarm module.
  5. Ignition ON, command the appropriate LED ON with a scan tool and test for less than 10 Ω between the appropriate control circuit listed below and ground:

    Front

    • Left amber LED - terminal 3
    • Center amber LED - terminal 2
    • Red LED - terminal 1

    Rear

    • Left amber LED - terminal B
    • Center amber LED - terminal C
    • Red LED - terminal D
    • If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, replace the object alarm module.
  6. If all circuits test normal, test or replace the appropriate information center telltale assembly.
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