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Home › Chevrolet › 2019 › Bolt EV LT › Repair and Diagnosis › External Pages › Different car › Section 29 (Image Display Camera System) › Diagnostic Information and Procedures › Rear Vision Camera System Malfunction › Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2018 Chevrolet Bolt EV. However, it is still accessible from the selected car via links, so may be relevant.
    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: B87 Rearview Camera
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 4 & Ground
    • If 10 ohms or greater 
    1. Disconnect the concerned ground connection.
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 4@Component harness & The other end of the circuit@Ground terminal
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On / Vehicle - In Service Mode
  5. Verify a test lamp turns On between the test points: Ignition circuit terminal 5 & Ground
    • If the test lamp does not turn On and the circuit fuse is OK 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Test for less than 2 ohms between the test points: Ignition circuit terminal 5 @Component harness & Output terminal@Fuse
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Refer to: Power Mode Mismatch
    • If the test lamp does not turn On and the circuit fuse is open 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Test for infinite resistance between the test points: Ignition circuit terminal 5 & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Test or replace the component: KR73 Ignition Main Relay
    • Go to next step: If the test lamp turns On 
  6. Ignition/Vehicle & All vehicle systems - Off
  7. Disconnect the electrical connector: X1@A11 Radio
  8. Ignition - On / Vehicle - In Service Mode
  9. Test for less than 1 V between the test points:
    • Signal circuit terminal 1@B87 Rearview Camera & Ground
    • Signal circuit terminal 2@B87 Rearview Camera & Ground
    • If 1 V or greater - Repair the short to voltage on the circuit.
    • Go to next step: If less than 1 V
  10. Test for infinite resistance between the test points:
    • Signal circuit terminal 1@B87 Rearview Camera & Ground
    • Signal circuit terminal 2@B87 Rearview Camera & Ground
    • If less than infinite resistance - Repair the short to ground on the circuit.
    • Go to next step: If infinite resistance
  11. Test for less than 2 ohms between the test points: Signal circuit terminal 1@Component harness & The other end of the circuit
    • If 2 ohms or greater - Repair the open/high resistance in the circuit.
    • Go to next step: If less than 2 ohms 
  12. Test for less than 2 ohms between the test points: Signal circuit terminal 2@Component harness & The other end of the circuit
    • If 2 ohms or greater - Repair the open/high resistance in the circuit.
    • Go to next step: If less than 2 ohms 
  13. Replace the component: B87 Rearview Camera
  14. Apply the parking brake.
  15. Engine RunningTransmission in Reverse
  16. Verify a clear rear vision image is displayed on the component: A11 Radio
    • If no clear image is displayed 

      Replace the component: A11 Radio

  17. All OK.
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