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Circuit/System Testing

Park Assist Disable Switch Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the I/P multifunction switch.
  2. Test for less than 10 Ω between the appropriate ground circuit terminal listed below and ground.
    • X88/Z88 terminal 3
    • Z75 terminal 5
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Park Assist Switch parameter is Inactive.
    • If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the object alarm module.
  4. Install a 3A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool Park Assist Switch parameter is Active.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the object alarm module.
  5. If all circuits test normal, test or replace the I/P multifunction switch.

Park Assist Disable LED Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the I/P multifunction switch.
  2. Ignition ON, verify a test lamp illuminates between the appropriate ignition circuit terminal listed below and ground.
    • X88/Z88 terminal 6
    • Z75 terminal 4
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  3. Ignition OFF, connect the harness connector at the I/P multifunction switch. Disconnect the X1 harness connector at the object alarm module.
  4. Ignition ON, verify the park assist disable LED is not illuminate.
    • If the LED is illuminated, test the control circuit for a short to ground. If the circuit tests normal, test or replace the I/P multifunction switch.
  5. Install a 10A fused jumper wire between the control circuit terminal 3 and ground. Verify the park assist disable LED is illuminated.
    • If the LED is not illuminated, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the I/P multifunction switch.
  6. If all circuits test normal, replace the object alarm module.
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