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Home >> Chevrolet >> 2019 >> Bolt EV Premier >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (Keyless Entry System And Remote Function) >> Diagnostic Information and Procedures >> DTC B305D >> Circuit/System Testing
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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: KR76 Retained Accessory Power Relay
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 3 & Ground
    • If 10 ohms or greater 
    1. Ignition/Vehicle & All vehicle systems - Off
    2. Test for less than 2 ohms between the test points: Ground circuit @ Component harness & The other end of the circuit
      • 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. Connect a test lamp between the test points: Control circuit terminal 5 & Ground circuit terminal 3
  6. Cycle the ignition from OFF to ON. - Verify the test lamp turns On and Off.
    • If the test lamp is always Off 
    1. Ignition/Vehicle & All vehicle systems - Off
    2. Disconnect the electrical connector: K84 Keyless Entry Control Module
    3. Test for infinite resistance between the test points: Control Circuit & 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: Ground circuit @ Component harness & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K84 Keyless Entry Control Module
      • If the test lamp is always On 
    5. Ignition/Vehicle & All vehicle systems - Off
    6. Disconnect the electrical connector: K84 Keyless Entry Control Module
    7. Test for less than 1 V between the test points: Control Circuit & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component: K84 Keyless Entry Control Module
    • Go to next step: If the test lamp turns On and Off 
  7. Replace the component: KR76 Retained Accessory Power Relay
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