LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 76 (Parking Brake System) >> Diagnostic Information and Procedures >> DTC C1586 (Hp4) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

The park brake is disabled as long as the DTC is set. It might be necessary to clear the DTC with a scan tool after repairing the fault to make the park brake work again.

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector:M104R Park Brake Actuator - Right & K17 Electronic Brake Control Module
  3. Ignition - On / Vehicle - In Service Mode
  4. Test for less than 1 V between the test points:
    • Terminal 2@K17 Electronic Brake Control Module & Ground
    • Terminal 3@K17 Electronic Brake Control Module & Ground
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  5. Ignition/Vehicle - Off
  6. Test for infinite resistance between the test points:
    • Terminal 2@K17 Electronic Brake Control Module & Ground
    • Terminal 3@K17 Electronic Brake Control Module & Ground
    • If less than infinite resistance - Repair the short to ground on the circuit. 
    • Go to next step: If infinite resistance 
  7. Test for less than 2 ohms between the test points:Terminal 1@Harness Connector-M104R Park Brake Actuator - Right & Terminal 2@Harness Connector-K17 Electronic Brake Control Module
    • If 2 ohms or greater - Repair the open/high resistance in the circuit. 
    • Go to next step: If less than 2 ohms 
  8. Test for less than 2 ohms between the test points:Terminal 2@Harness Connector-M104R Park Brake Actuator - Right & Terminal 3@Harness Connector-K17 Electronic Brake Control Module
    • If 2 ohms or greater - Repair the open/high resistance in the circuit. 
    • Go to next step: If less than 2 ohms 
  9. Connect a 25 A fused jumper wire between the test points: Control terminal 1orControl terminal 2 & 12 V
    10. CAUTION:

    Complete the testing as quickly as possible in order to prevent overheating and damaging the component.

  10. Momentarily connect a jumper wire between the test points: Control terminal 2orControl terminal 1 & Ground

    Reverse the jumper wires 2 times between the terminals.

    Verify the component works as specified: M104R Park Brake Actuator - Right = Apply & Release

    • If not the specified state 

      Replace the component:M104R Park Brake Actuator - Right

    • Go to next step: If the specified state 
  11. Replace the component:K17 Electronic Brake Control Module
scientia non olet · About LEMON Manuals