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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 127 (Sunroof) >> Diagnostic Information and Procedures >> DTC B369B >> Circuit/System Testing

Circuit/System Testing

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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: A98 Front Overhead Console Assembly
  3. Test for less than 10 ohms between the test points: Low Reference circuit terminal 4 @ Component harness & Ground

    If 10 ohms or greater 

    1. Disconnect the appropriate electrical connector: M69 Sunroof Motor
    2. Test for less than 2 ohms between the test points: Low Reference circuit terminal 4 @ 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 = Test or replace the component:

    4. If less than 10 ohms 

  4. Ignition = On / Vehicle = In Service Mode
  5. Test for 4.5 to 5.5V between the test points: Signal circuit terminal 10 @ Component harness & Ground

    If less than 4.5V 

    1. Ignition/Vehicle = Off
    2. Disconnect the appropriate electrical connector: M69 Sunroof Motor
    3. Test for infinite resistance between the test points: Signal circuit terminal 10 @ Component harness & Ground
      • If less than infinite resistance = Repair the short to ground on the circuit.
      • If infinite resistance
    4. Test for less than 2 ohms between the test points: Signal circuit terminal 10 @ 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: M69 Sunroof Motor

    If greater than 5.5V 

    1. Ignition/Vehicle & All vehicle systems = Off
    2. Disconnect the appropriate electrical connector: M69 Sunroof Motor
    3. Test for less than 1V between the test points: Signal circuit terminal 10 @ Component harness & Ground
      • If 1V or greater = Repair the short to voltage on the circuit.
      • If less than 1V = Replace the component: M69 Sunroof Motor

    6. If between 4.5 and 5.5V 

  6. Test or replace the component: A98 Front Overhead Console Assembly
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