Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Saab >> 2011 >> 9-5 Turbo6 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Management And Fuel System, V6 (2 Of 5) >> DTC P0119: Engine Coolant Temperature (ECT) Sensor Circuit Intermittent >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
  2. WARNING: Do NOT use a test lamp to test the continuity of the circuit. Damage to the control module may occur due to excessive current draw.
    NOTE: The control module or the sensor may be damaged if the circuit is shorted to battery positive voltage.

    Test for less than 5 Ω between the low reference circuit terminal 2 and ground.

  3. If greater than the specified range, test the low reference circuit for an open/high resistance, or for a short to voltage. If the circuit tests normal, replace the K20 ECM.
  4. Ignition ON, verify that the scan tool ECT sensor parameter is at -40°C (-40°F).
  5. If warmer than the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the K20 ECM.
  6. NOTE: If the fuse in the jumper wire opens, the signal circuit is shorted to a voltage and the sensor may be damaged.

    Ignition ON, install a 3 A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the ECT sensor parameter is greater than 142°C (288°F).

  7. If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  8. If all circuits test normal, test or replace the B34 ECT sensor.
scientia non olet · About Mike's Workshop Manuals