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 P0641, P0651, P0697, or P06A3 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle - Off
    2. NOTE:

    Additional DTCs will set when disconnecting the components.

  2. Disconnect the electrical connector at one of the following components, depending on the DTC that is set:

    P0641

    • B1 A/C Refrigerant Pressure Sensor
    • B23 Camshaft Position Sensor
    • B75C Multifunction Intake Air Sensor
    • B154 Diesel Particulate Filter Exhaust Differential Pressure Sensor
    • Q14 Exhaust Gas Recirculation Valve

    P0651

    • B22 Brake Pedal Position Sensor
    • B26 Crankshaft Position Sensor
    • B65 Intake Manifold Pressure and Air Temperature Sensor
    • Q38 Throttle Body

    P0697

    • B107 Accelerator Pedal Position Sensor - Sensor 2

    P06A3

    • B47B Fuel Rail Pressure Sensor
    • B107 Accelerator Pedal Position Sensor - Sensor 1
  3. Ignition - On/Vehicle - In Service Mode
  4. Verify the scan tool parameter: 5 V Reference 1 - 4 Circuit Status = Malfunction - For the circuit that set the DTC.
    • If not the specified state after disconnecting a component from the circuit 

      Test or replace the component: The component that was disconnected last.

    • If the specified state and there are components connected to the circuit 

      Disconnect a component and repeat step 4.

    • Go to next step: If the specified state with all components disconnected from the circuit 
  5. Test for 4.8 to 5.2 V between the test points:

    P0641 - 5 V Reference 1 Circuit

    • 5 V Reference circuit terminal 2 @ B1 A/C Refrigerant Pressure Sensor & Ground
    • 5 V Reference circuit terminal 1 @ B23 Camshaft Position Sensor & Ground
    • 5 V Reference circuit terminal 2 @ B75C Multifunction Intake Air Sensor & Ground
    • 5 V Reference circuit terminal 1 @ B154 Diesel Particulate Filter Exhaust Differential Pressure Sensor & Ground
    • 5 V Reference circuit terminal 1 @ Q14 Exhaust Gas Recirculation Valve & Ground

    P0651 - 5 V Reference 2 Circuit

    • 5 V Reference circuit terminal 1 @ B26 Crankshaft Position Sensor & Ground
    • 5 V Reference circuit terminal 2 @ B65 Intake Manifold Pressure and Air Temperature Sensor & Ground
    • 5 V Reference circuit terminal 5 @ Q20 Intake Air Flow Valve & Ground

    P0697 - 5 V Reference 3 Circuit

    • 5 V Reference circuit terminal 1 @ B107 Accelerator Pedal Position Sensor - Sensor 2 & Ground

    P06A3 - 5 V Reference 4 Circuit

    • 5 V Reference circuit terminal 1 @ B47B Fuel Rail Pressure Sensor & Ground
    • 5 V Reference circuit terminal 2 @ B107 Accelerator Pedal Position Sensor - Sensor 1 & Ground
    • If less than 4.8 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: K20 Engine Control Module
    3. Test for infinite resistance between the test points:

      P0641

      • 5 V Reference circuit terminal 7 X3 @ Control module harness & Ground
      • 5 V Reference circuit terminal 40 X2 @ Control module harness & Ground
      • 5 V Reference circuit terminal 46 X1 @ Control module harness & Ground
      • 5 V Reference circuit terminal 50 X3 @ Control module harness & Ground
      • 5 V Reference circuit terminal 59 X2 @ Control module harness & Ground

      P0651

      • 5 V Reference circuit terminal 43 X2 @ Control module harness & Ground
      • 5 V Reference circuit terminal 82 X2 @ Control module harness & Ground
      • 5 V Reference circuit terminal 83 X2 @ Control module harness & Ground

      P0697

      • 5 V Reference circuit terminal 14 X1 @ Control module harness & Ground

      P06A3

      • 5 V Reference circuit terminal 13 X1 @ Control module harness & Ground
      • 5 V Reference circuit terminal 89 X2 @ Control module harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: K20 Engine Control Module
    • If greater than 5.2 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: K20 Engine Control Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:

      P0641

      • 5 V Reference circuit terminal 7 X3 @ Control module harness & Ground
      • 5 V Reference circuit terminal 40 X2 @ Control module harness & Ground
      • 5 V Reference circuit terminal 46 X1 @ Control module harness & Ground
      • 5 V Reference circuit terminal 50 X3 @ Control module harness & Ground
      • 5 V Reference circuit terminal 59 X2 @ Control module harness & Ground

      P0651

      • 5 V Reference circuit terminal 43 X2 @ Control module harness & Ground
      • 5 V Reference circuit terminal 82 X2 @ Control module harness & Ground
      • 5 V Reference circuit terminal 83 X2 @ Control module harness & Ground

      P0697

      • 5 V Reference circuit terminal 14 X1 @ Control module harness & Ground

      P06A3

      • 5 V Reference circuit terminal 13 X1 @ Control module harness & Ground
      • 5 V Reference circuit terminal 89 X2 @ Control module 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 4.8 and 5.2 V 
  6. All OK.
scientia non olet · About LEMON Manuals