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Home >> Saturn >> 2007 >> Outlook XE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Engine Control System & Fuel System - 4.6L - DTC P0010 To DTC P0336) >> DTC P0112 or P0113 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the MAF/IAT sensor.
  2. Ignition OFF, allow sufficient time for the control module to power down. Test for less than 5 ohms of resistance between the low reference circuit terminal D and ground.
    • If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  3. Ignition ON, verify the scan tool IAT Sensor parameter is less than -39°C (-38°F).
    • If greater than the specified value, test the signal circuit terminal E for a short to ground. If the circuit tests normal, replace the ECM.
    4. IMPORTANT: If a short to voltage is found on the IAT signal circuit, the 3A fuse in the jumper wire will open.
  4. Install a 3A fused jumper wire between the signal circuit terminal E and a ground. Verify the scan tool IAT Sensor parameter is greater than 149°C (300°F).
    • 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 ECM.
  5. If all circuits test normal, test the MAF/IAT sensor. Refer to Component Testing.
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