LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2019 >> Cruze Premier, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P057B-P208D)) >> Diagnostic Information and Procedures >> DTC P204B-P204D (68 Body - Hatchback) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
NOTE:

It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: X1 @ A39 Reductant Tank
  3. Test for less than 10 ohms between the test points: Low Reference circuit terminal 5 X1 & Ground
    • If 10 ohms or greater 
    1. Disconnect the electrical connector: X2 @ K115 Reductant Control Module
    2. Test for less than 2 ohms between the test points: Low Reference circuit terminal 5 X1 @ Component harness & Terminal 13 @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K115 Reductant Control Module
    • Go to next step: If less than 10 ohms 
  4. Ignition - On/Vehicle - In Service Mode
  5. Test for 4.8 to 5.2 V between the test points: 5 V Reference circuit terminal 1 X1 & Ground
    • If less than 4.8 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X2 @ K115 Reductant Control Module
    3. Test for infinite resistance between the test points: 5 V Reference circuit terminal 1 X1 @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points: 5 V Reference circuit terminal 1 X1 @ Component harness & Terminal 7 @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K115 Reductant Control Module
    • If greater than 5.2 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X2 @ K115 Reductant Control Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: 5 V Reference circuit terminal 1 X1 @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component: K115 Reductant Control Module
    • Go to next step: If between 4.8 - 5.2 V 
  6. Disconnect the electrical connector: X2 @ A39 Reductant Tank
  7. Test for 4.8 to 5.2 V between the test points: Signal circuit terminal 6 X2 & Low Reference circuit terminal 5 X1 @ Component harness
    • If less than 4.8 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X2 @ K115 Reductant Control Module
    3. Test for infinite resistance between the test points: Signal circuit terminal 6 X2 @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points: Signal circuit terminal 6 X2 @ Component harness & Terminal 5 @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K115 Reductant Control Module
    • If greater than 5.2 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X2 @ K115 Reductant Control Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 6 X2 @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component: K115 Reductant Control Module
    • Go to next step: If between 4.8 and 5.2 V 
  8. Replace the component: A39 Reductant Tank
scientia non olet · About LEMON Manuals