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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P205B - P2BAA) And Symptoms) >> Diagnostic Information And Procedures >> DTC P2ADA-P2ADD: Reductant Tank Temperature Sensor 2 Circuit >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition Off, disconnect the harness connector at the B295 Reductant Quality Sensor.
  2. Ignition On.
  3. Test for less than 20 Ω between low reference terminal 3 and ground.
    • If greater than 20 Ω 
    1. Ignition Off, disconnect the X2 harness connector at the K115 Reductant Control Module.
    2. Test for less than 2 Ω in the low reference circuit end to end
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K115 Reductant Control Module.
    • Go to next step: If less than 20 Ω 
  4. Test for 4.8-5.2 V between 5 V reference circuit terminal 1 and ground
    • If less than 4.8 V 
    1. Ignition Off, disconnect the X2 harness connector at the K115 Reductant Control Module.
    2. Test for less than 2 Ω in the 5 V reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω
    3. Test for infinite resistance between the 5 V reference circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K115 Reductant Control Module
    • If greater than 5.2 V 
    1. Ignition Off, disconnect the X2 harness connector at the K115 Reductant Control Module.
    2. Test for less than 1 V between the 5 V reference circuit and ground.
      • If 1 V or greater, repair the short to voltage in the circuit.
      • If less than 1 V, replace the K115 Reductant Control Module
    • Go to next step: If between 4.8-5.2 V 
  5. Ignition ON, test for 4.4-4.8 V between signal circuit terminal 2 and ground.
    • If less than 4.4 V 
    1. Ignition Off, disconnect the X2 harness connector at the K115 Reductant Control Module.
    2. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω
    3. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K115 Reductant Control Module
    • If greater than 4.8 V 
    1. Ignition Off, disconnect the X2 harness connector at the K115 Reductant Control Module.
    2. Ignition On, test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage in the circuit.
      • If less than 1 V, replace the K115 Reductant Control Module
    • Go to next step: If between 4.4-4.8 V 
  6. Replace the B295 Reductant Quality Sensor.
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