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Home >> Chevrolet >> 2014 >> Camaro LS, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> DTC B0158: Ambient Air Temperature Sensor >> Circuit/System Testing

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 and ground.
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  3. Test for less than 10 ohms between the low reference circuit terminal B and ground.
    • If 10 ohms or greater 
    1. Ignition OFF, disconnect the harness connector at the P16 Instrument Cluster.
    2. Test for less than 2 ohms in the low reference circuit end to end.
      • If 2 ohms or greater, repair the open/high resistance in the circuit.
      • If less than 2 ohms, replace the P16 Instrument Cluster.
    • If less than 10 ohms 
  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.
    • If greater than 98% 
  6. Install a 3A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B.
  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.
      • If less than 1 V
    3. Ignition OFF
    4. Test for less than 2 ohms in the signal circuit end to end.
      • If 2 ohms or greater, repair the open/high resistance in the circuit.
      • If less than 2 ohms, replace the P16 Instrument Cluster.
    • If less than 8% 
  8. Test or replace the B9 Ambient Air Temperature Sensor.
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