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Circuit/System Testing

CAUTION: Refer to SIR Caution .
  1. Ignition OFF, disconnect the harness connector at the audio steering wheel control switch.
  2. Ignition ON, test for 10-12 volts between the voltage circuit and ground at the switch harness connector.
    • If less than 10 volts, test the voltage circuit for a short to ground or an open/high resistance. If circuit test normal, replace the BCM.
  3. Test for 0-0.5 volts between the signal circuit and ground at the switch harness connector.
    • If greater than 0.5 volts, test the signal circuit for short to voltage. If circuit test normal, replace BCM.
  4. Test for 10-12 volts between the voltage circuit and the signal circuit at the switch harness connector.
    • If less than 10 volts, test the signal circuit for an open/high resistance. If circuit test normal, replace the BCM.
  5. Ignition OFF, disconnect the harness connector at the BCM.
  6. Test for infinite resistance between the signal circuit and ground at the harness connector.
    • If less than infinite resistance, test the signal circuit for a short to ground. If circuit test normal, replace the BCM.
  7. If all circuits test normal, test or replace switch.
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