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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 >> DTC B2455 >> 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. Ignition OFF, disconnect the inside rear view mirror harness connector.
  2. Ignition ON, test for less than 9.5 volts at the cellular signal circuit terminal 10.
    • If greater than the specified value, repair short to voltage.
  3. Ignition OFF, test for greater than 1 ohm between the cellular signal circuit terminal 10 and ground.
    • If less than specified value, repair short to ground.
  4. Disconnect C2 VCIM harness connector.
  5. Test for less than 1 ohm of resistance between the inside rear view mirror harness connector terminal 2 and VCIM harness connector terminal 10.
    • If greater than the specified value, repair open/high resistance.
  6. Test for less than 1 ohm of resistance between the inside rear view mirror harness connector terminal 10 and VCIM harness connector terminal 9.
    • If greater than the specified value, repair open/high resistance.
  7. If all circuits test normal, test or replace the inside rear view mirror.
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