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Home >> Chevrolet >> 2017 >> Traverse Premier, FWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System, And Navigation System >> Diagnostic Information and Procedures >> DTC B2476 or B2482: Cellular Phone Select Service Switch >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the A10 inside rearview mirror.
  2. Test for less than 10 Ω between the mirror ground circuit terminal 8 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, test for less than 1 V between the keypad signal circuit terminal 11 and ground.
    • If greater than the specified range, test the keypad signal circuit for a short to voltage. If the circuit tests normal, replace the CIM.
  4. Ignition OFF, test for 600k - 800k Ω between the keypad signal circuit terminal 11 and ground.
    • If less than the specified range, test the keypad signal circuit for a short to ground. If the circuit tests normal, replace the CIM.
    • If greater than the specified range, test the keypad signal circuit for an open/high resistance. If the circuit tests normal, replace the CIM.
  5. Ignition ON, test for 9.5 - 10.5 V between the keypad supply voltage circuit terminal 12 and ground.
    • If less than the specified range, test the supply voltage circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the CIM.
    • If greater than the specified range, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the CIM.
  6. If all circuits test normal, test or replace the button assembly.
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