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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 72 (Seat Belt System) >> Diagnostic Information and Procedures >> Seat Belt Indicator Malfunction - Driver >> 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.
  1. Ignition - On / Vehicle - In Service Mode
  2. Disconnect the electrical connector:B153D Seat Belt Buckle - Driver
  3. Test for less than 5 ohms between the test points:Low Reference terminal 2 & Ground
    • If 5 ohms or greater 
    1. Disconnect the electrical connector:K36 Inflatable Restraint Sensing and Diagnostic Module
    2. Test for less than 2 ohms between the test points:Low Reference circuit terminal 2@B153D Seat Belt Buckle - Driver & 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:K36 Inflatable Restraint Sensing and Diagnostic Module
    • Go to next step: If less than 5 ohms 
  4. Ignition - On / Vehicle - In Service Mode
  5. Verify the scan tool parameter:Driver Seat Belt Status=Buckled
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:K36 Inflatable Restraint Sensing and Diagnostic Module
    3. Test for infinite resistance between the test points:Signal circuit terminal 1@Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component:K36 Inflatable Restraint Sensing and Diagnostic Module
    • Go to next step: If the specified state 
  6. Connect a 3 A fused jumper wire between the test points:Signal circuit terminal 1 & Low Reference circuit terminal 2
  7. Verify the scan tool parameter:Driver Seat Belt Status=Buckled
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector:K36 Inflatable Restraint Sensing and Diagnostic Module
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:Signal circuit terminal 1@Component harness & 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:Signal circuit terminal 1@Component harness & The other end of the circuit@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K36 Inflatable Restraint Sensing and Diagnostic Module
    • Go to next step: If the specified state 
  8. Test or replace the component:B153D Seat Belt Buckle - Driver
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