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Home >> Saturn >> 2006 >> Relay 3.9 1, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 3.9L - DTC P0010 To DTC P0420 >> DTC P0117 or P0118 >> Circuit/System Testing
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Circuit/System Testing

    IMPORTANT:
    • The cooling fans are commanded ON when certain DTCs are set.
    • If shorted to voltage occurs, the ECT sensor may be damaged.
  1. Ignition OFF, disconnect the harness connector at the ECT sensor.
  2. Ignition OFF, test for less than 5 ohm of resistance between the low reference circuit terminal A and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the control module.
  3. Ignition ON, verify the scan tool ECT parameter is less than -38°C (-36°F).
    • If greater than the specified range, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the control module.
  4. Install a 3A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool ECT parameter is greater than 138°C (280°F).
    • If less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the control module.
  5. If all circuits test normal, test or replace the ECT sensor.
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