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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at each of the object sensors, ignition On, transmission in REVERSE
  2. Test for 7.2-9.2 V between the object sensor reference circuit terminal 1 at all B78 Rear Object Sensor harness connectors and ground.
    • If less than 7.2 V 
    1. Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module.
    2. Test for infinite resistance between the 8 V reference circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the 8 V reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K41R Rear Parking Assist Control Module.
    • If greater than 9.2 V 
    1. Disconnect the harness connector X 2 at the K41R Rear Parking Assist Control Module, igniton ON.
    2. Test for less than 1 V between the 8 V supply voltage circuit and ground.
      • If 1 V or greater, repair the short to voltage in the circuit.
      • If less than 1 V, replace the K41R Rear Parking Assist Control Module.
    • If between 7.2-9.2 V 
  3. All OK.
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