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Home >> Cadillac >> 2013 >> Escalade Hybrid, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - DTC P0010 To DTC P0430) >> Diagnostic Information and Procedures >> DTC P0134, P0140, P0154, or P0160 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate B52 Heated Oxygen Sensor. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 5 Ω 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 K20 Engine Control Module.
  3. Ignition ON, verify the appropriate scan tool B52 Heated Oxygen Sensor voltage parameter is approximately 450 mV.
    • If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.
    • If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.
  4. Install a 3 A fused jumper wire between the signal circuit terminal B and ground. Verify the appropriate scan tool B52 Heated Oxygen Sensor voltage parameter is less than 60 mV.
    • If greater than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  5. If all circuits test normal, replace the appropriate B52 Heated Oxygen Sensor.
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