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Circuit/System Testing

NOTE: If DTC B2815 59 is set the steering wheel switch component test should be performed prior to continuing with component testing below.
  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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