LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2019 >> Cruze Premier, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 1.6L (LH7) Diesel) >> Diagnostic Information and Procedures >> DTC P25AC or P25AD >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: B267 Piston Cooling Oil Pressure Switch
  3. Ignition - On/Vehicle - In Service Mode
  4. Test for battery voltage between the test points: Signal circuit terminal 1 & Ground
    • If less than battery voltage 
    1. Ignition/Vehicle - Off
    2. Disconnect the appropriate electrical connector: K20 Engine Control Module
    3. Test for infinite resistance between the test points: Signal circuit terminal 1 & 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 1 @ Component harness & The other end of the circuit @ 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
    • Go to next step: If battery voltage 
  5. Ignition/Vehicle - Off
  6. Disconnect the appropriate electrical connector: K20 Engine Control Module
  7. Ignition - On/Vehicle - In Service Mode
  8. Test for less than 1 V between the test points: Signal circuit terminal 1 @ Component harness & Ground
    • If 1 V or greater - Repair the short to voltage on the circuit. 
    • Go to next step: If less than 1 V 
  9. Test or replace the component: B267 Piston Cooling Oil Pressure Switch
scientia non olet · About LEMON Manuals