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Home >> Chevrolet >> 2011 >> Chevy Express H1500, Van Cargo >> Repair and Diagnosis >> External Pages >> Different car >> Section 1764 (Engine Cooling System) >> Diagnostic Information and Procedures >> DTC P00B6 >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF, disconnect the harness connector at the B34B Engine Coolant Temperature Sensor 2.
  2. Ignition OFF, test for less than 5 Ω between the low reference circuit terminal 2 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 scan tool B34B Engine Coolant Temperature Sensor 2 parameter is -40°C (-40°F).
    • If greater than the specified range, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace K20 Engine Control Module.
    4. NOTE: If the fuse in the jumper wire opens, the signal circuit is shorted to a voltage and the sensor may be damaged.
  4. Install a 1 A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool B34B Engine Coolant Temperature Sensor 2 parameter is at 150°C (302°F).
    • If less than specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  5. If all circuits test normal, test or replace the B34B Engine Coolant Temperature Sensor 2.
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