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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 96 (Wiper System And Washer System) >> Diagnostic Information and Procedures >> DTC B3715 or B3875 >> Circuit/System Testing

Circuit/System Testing

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DTC B3715

    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. Remove the component:KR12B Windshield Wiper Relay
  3. Test for less than 10 ohms between the test points:Ground circuit terminal 85 & Ground
    • If 10 ohms or greater 
    1. Disconnect the ground connection:
    2. Test for less than 2 ohms between the test points:Ground circuit & The other end of the circuit@GroundTerminal
      • 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. Connect a test lamp between the test points:Control circuit terminal 86 & Ground circuit terminal 85
  5. Ignition - On / Vehicle - In Service Mode
  6. Perform the scan tool control function:Windshield Wiper Motor Relay - Low & Stop

    Verify the test lamp turns On and Off.

    • If the test lamp is always Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Test for infinite resistance between the test points:Control circuit terminal 16 X4@Relay Socket & 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@Relay Socket & Ground
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K9 Body Control Module
    • If the test lamp is always On 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:Control circuit terminal 16 X4@Relay Socket & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component:K9 Body Control Module
    • Go to next step: If the test lamp turns On and Off 
  7. Test or replace the component:KR12B Windshield Wiper Relay

DTC B3875

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Remove the component:KR12C Windshield Wiper Speed Control Relay
  3. Ignition - On / Vehicle - In Service Mode
  4. Verify a test lamp turns On between the test points:B+ circuit terminal 85 & 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: B+ circuit terminal 85 & Output terminal @ & @Fuse
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Verify the fuse is OK and there is voltage at the fuse.
    • 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:B+ circuit terminal 85 & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component:KR12C Windshield Wiper Speed Control Relay
    • Go to next step: If the test lamp turns On 
  5. Connect a test lamp between the test points:B+ circuit terminal 85 & Control circuit terminal 86
  6. Perform the scan tool control function:Windshield Wiper Motor Relay - High & Stop

    Verify the test lamp turns On and Off.

    • If the test lamp is always Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Control circuit terminal 24 X5@ Relay Socket & 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 less than 2 ohms between the test points:Control Circuit@Relay Socket & Ground
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K9 Body Control Module
    • If the test lamp is always On 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Test for infinite resistance between the test points:Control circuit terminal 24 X5@Relay Socket & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component:K9 Body Control Module
    • Go to next step: If the test lamp turns On and Off 
  7. Test or replace the component:KR12C Windshield Wiper Speed Control Relay
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