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Home >> Chevrolet >> 2012 >> Caprice 6.0 2 >> Repair and Diagnosis >> External Pages >> Different car >> Section 185 (Secondary And Configurable Customer Control System) >> Diagnostic Information and Procedures >> Steering Wheel Controls Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2011 Chevrolet Caprice. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the steering wheel switch assembly. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 5 Ω between the low reference circuit terminal 5 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the IPC.
  3. Ignition ON, test for 4.8-5.2 volts between the signal circuit terminal 6 and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the IPC.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the IPC.
  4. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down.
  5. Test for less than 10 Ω between the steering wheel switch ground terminal 7 and ground.
    • If greater than the specified range, test the steering wheel switch ground for an open/high resistance. If the circuit tests normal, replace the steering wheel switch.
  6. Ignition ON, test for 4.8-5.2 volts between the signal circuit terminals listed below and ground.
    • Right Steering Wheel Scroll 2 terminal 1.
    • Right Steering Wheel Scroll 1 terminal 2.
    • Left Steering Wheel Scroll 1 terminal 3.
    • Left Steering Wheel Scroll 2 terminal 4.
    • If less than the specified range, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the IPC.
    • If greater than the specified range, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the IPC.
  7. If all circuits test normal, replace the steering wheel control switch assembly.
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