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Circuit/System Testing

NOTE:

Circuit/System Verification must be performed before proceeding with Circuit/System Testing.

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B9 Ambient Air Temperature Sensor. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 1 V between the low reference circuit terminal B (or 2) and ground.
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  3. Test for less than 10 Ω between the low reference circuit terminal B (or 2) and ground.
    • If 10 Ω or greater 
    1. Ignition OFF, disconnect the harness connector at the P16 Instrument Cluster.
    2. Test for less than 2 Ω in the low 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 P16 Instrument Cluster.
    • Go to next step: If less than 10 Ω 
  4. Ignition ON.
  5. Verify the scan tool Ambient Air Temperature parameter is greater than 98%.
    • If 98% or less 
    1. Ignition OFF, disconnect the harness connector at the P16 Instrument Cluster.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the P16 Instrument Cluster.
    • Go to next step: If greater than 98% 
  6. Install a 3 A fused jumper wire between the signal circuit terminal A (or 1) and the low reference circuit terminal B (or 2).
  7. Verify the scan tool Ambient Air Temperature parameter is less than 8%.
    • If 8% or greater 
    1. Ignition OFF, disconnect the harness connector at the P16 Instrument Cluster, ignition ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    3. Ignition OFF
    4. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the P16 Instrument Cluster.
    • Go to next step: If less than 8% 
  8. Connect the component: B9 Ambient Air Temperature Sensor
  9. Operate the vehicle within the Conditions for Running the DTC.
  10. Verify the DTC does not set.
    • If the DTC sets

      Replace the component: B9 Ambient Air Temperature Sensor

    • Go to next step: If the DTC is not set
  11. All OK.
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