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Home >> Chevrolet >> 2019 >> Cruze Premier, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P0016-P054F)) >> Diagnostic Information and Procedures >> DTC P020A-P020D >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle - Off
  2. Disconnect the appropriate electrical connector: Q17 Fuel Injector
  3. Ignition - On/Vehicle - In Service Mode
  4. Test for 4.5 to 6.5 V between the test points: Control circuit terminal 1 & Ground
    • If less than 4.5 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X2 @ K20 Engine Control Module
    3. Test for infinite resistance between the test points: Control circuit terminal 1 @ 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: Control circuit terminal 1 @ Component harness &
      • {Q17A Fuel Injector 1} Terminal 4 @ Control module harness
      • {Q17B Fuel Injector 2} Terminal 1 @ Control module harness
      • {Q17C Fuel Injector 3} Terminal 2 @ Control module harness
      • {Q17D Fuel Injector 4} Terminal 3 @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K20 Engine Control Module
    • If greater than 6.5 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X2 @ K20 Engine Control Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Control circuit terminal 1 @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component: K20 Engine Control Module
    • Go to next step: If between 4.5 and 6.5 V 
  5. Test for 0.60 to 0.80 V between the test points: Control circuit terminal 2 @ Component harness & Ground
    • If less than 0.60 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X2 @ K20 Engine Control Module
    3. Test for infinite resistance between the test points: Control circuit terminal 2 @ 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: Control circuit terminal 2 @ Component harness &
      • {Q17A Fuel Injector 1} Terminal 8 @ Control module harness
      • {Q17B Fuel Injector 2} Terminal 5 @ Control module harness
      • {Q17C Fuel Injector 3} Terminal 6 @ Control module harness
      • {Q17D Fuel Injector 4} 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: K20 Engine Control Module
    • If greater than 0.80 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X2 @ K20 Engine Control Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Control circuit terminal 2 @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component: K20 Engine Control Module
    • Go to next step: If between 0.60 and 0.80 V 
  6. Test or replace the component: Q17 Fuel Injector
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