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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the electronic compass module.
  2. Ignition OFF, test for less than 5.0 Ω between the ground circuit terminal 2 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify a test lamp illuminates between the ignition voltage circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance.
  4. Test for 6.0-7.0 volts between the LIN bus circuit terminal 3 and ground.
    • If greater than the specified range, test the LIN bus circuit for a short to voltage. If the circuit tests normal, replace the BCM.
    • If less than the specified range, test the LIN bus circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, replace the electronic compass module.
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