LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2006 >> STS Base, 3.6 7, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> DTC B0158 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF disconnect the harness connector at the outside air temperature (OAT) sensor.
  2. Ignition OFF, test for less than 1 ohm of resistance between the ground circuit terminal and ground.
    • If greater than 1 ohm, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the driver information center (DIC) displays -40°C (-40°F).
    • If the DIC does not display -40°C (-40°F), test the OAT sensor signal circuit for a short to ground. If the circuit tests normal, replace the HVAC module.
  4. Ignition ON, install a 3-amp fused jumper wire between the signal circuit and the ground circuit of the OAT sensor. Verify the DIC displays 87.5°C (189.5°F).
    • If the DIC does not displays 87.5°C (189.5°F), test the signal circuit of the OAT sensor for a short to voltage or an open/high resistance. If the circuit tests normal, replace the HVAC module.
  5. If all circuits test normal, test or replace the OAT sensor.
scientia non olet · About LEMON Manuals