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July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit/System Testing

  1. Vehicle OFF, disconnect the harness connector at the S70L steering wheel controls switch - left.
  2. Vehicle in Service Mode, test for B+ between the voltage reference circuit and ground.
    • If less than the specified value, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  3. Test for B+ between the voltage reference circuit and the signal circuit.
    • If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. Vehicle OFF, disconnect the X3 harness connector at the K9 BCM.
  5. Test for infinite resistance between the signal circuit terminal 36 and ground.
    • If less than the specified value, test the signal circuit for a short to ground.
  6. If all circuits test normal, test or replace the S70L steering wheel controls switch - left.
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