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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the steering wheel switch assembly.
  2. Test for less than 5 ohms 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. 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.
  5. If all circuits test normal, replace the steering wheel control switch assembly.
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