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Home >> Chevrolet >> 2010 >> Traverse LS, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 3.6L - DTC P0192 To DTC P0629/P062B >> DTC P0452 or P0453 >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF, remove the fuse that supplies B+ to terminal X2-56 of the ECM.
  2. Disconnect the pass thru multi-way harness connector X305, located on the underbody beneath the left front door.
  3. Test for less than 5 Ω between the low reference circuit terminal E and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit/connections test normal, replace the ECM.
  4. Install the fuse that supplies B+ to terminal X2-56 of the ECM.
  5. Ignition ON, test for 4.8-5.2 V between the 5-volt reference circuit terminal H and ground.
    • If less than the specified range, test the 5-volt reference circuit for a short to ground or open/high resistance. If the circuit/connections test normal, replace the ECM.
    • If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit/connections test normal, replace the ECM.
  6. Observe the scan tool FTP sensor parameter. Verify that the FTP Sensor parameter is less than 4.8 V.
    • If greater than the specified value, test the signal circuit for a short to voltage. If the circuit/connections test normal, replace the ECM.
  7. Install a 3 A fused jumper wire between the signal circuit terminal B and the 5-volt reference circuit terminal H. Verify that the scan tool FTP Sensor parameter is greater than 4.8 V.
    • If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit/connections test normal, replace the ECM.
  8. Remove the fuel tank. Refer to Fuel Tank Replacement .
  9. Disconnect the FTP sensor connector.
  10. Inspect the FTP sensor circuits in the fuel tank harness, between the FTP sensor connector and X305 for the following conditions, and repair as necessary:
    • Damaged wiring or terminals
    • Open circuits
    • Short to ground
    • Wire to wire short
  11. If all circuits/connections test normal, test or replace the FTP sensor.
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