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Home >> Chevrolet >> 2018 >> Traverse L >> Repair and Diagnosis >> External Pages >> Different car >> Section 49 (Supplemental Restraints System) >> Diagnostic Information and Procedures >> DTC B0071 >> Circuit/System Testing
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit/System Testing

WARNING: This page is about a different car, the 2019 Chevrolet Traverse. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:
    • Refer to: SIR Service Precautions 
    • Inspect the terminals of the following components and connectors for damage or corrosion and repair or replace as necessary:
      • B61P Seat Belt Tension Sensor - Passenger
      • K36 Inflatable Restraint Sensing and Diagnostic Module
      • Inline Harness Connector
    • The connector position assurance (CPA) should seat with an audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.
    • If the condition is intermittent, wiggle the related wiring harnesses and connectors, with the ignition/vehicle on or engine running, while monitoring the scan tool circuit status parameters for the component. The parameters will display if there is a condition with the circuit or a connection.
    • If the condition is intermittent or cannot be duplicated, disconnect the connectors and add dielectric grease or lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087). This procedure will correct the high resistance condition due to terminal fretting corrosion.
      • B61P Seat Belt Tension Sensor - Passenger & Harness Connector
      • K36 Inflatable Restraint Sensing and Diagnostic Module & Harness Connector
  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: B61P Seat Belt Tension Sensor - Passenger
  3. Test for less than 10 ohms between the test points: Low Reference circuit terminal 1 & Ground
    • If 10 ohms or greater 
    1. Ignition/Vehicle & All vehicle systems - Off
    2. Disconnect the electrical connector: K85 Passenger Presence Module
    3. Test for less than 10 ohms between the test points: Low Reference circuit terminal 1@Component harness & The other end of the circuit@Control module harness
      • If 10 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 10 ohms - Replace the component: K85 Passenger Presence Module
    • Go to next step: If less than 10 ohms 
  4. Ignition - On / Vehicle - In Service Mode
  5. Test for less than 6 V between the test points: Signal circuit terminal 2 & Ground
    • If 6 V or greater 
    1. Ignition/Vehicle & All vehicle systems - Off
    2. Disconnect the electrical connector: K85 Passenger Presence Module
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 2@B61P Seat Belt Tension Sensor - Passenger & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component: K85 Passenger Presence Module
    • Go to next step: If less than 6 V 
  6. Ignition/Vehicle & All vehicle systems - Off
  7. Test for greater than 5 kohms between the test points: Signal circuit terminal 2 & Ground
    • If 5 kohms or less 
    1. Disconnect the electrical connector: K85 Passenger Presence Module
    2. Test for infinite resistance between the test points: Signal circuit terminal 2@B61P Seat Belt Tension Sensor - Passenger & Ground
      • If less than infinite resistance - Repair the short between the circuits.
      • If infinite resistance - Replace the component: K85 Passenger Presence Module
    • Go to next step: If greater than 5 kohms 
  8. Disconnect the electrical connector: K85 Passenger Presence Module
  9. Test for less than 2 ohms between the test points: Signal circuit terminal 2@B61P Seat Belt Tension Sensor - Passenger & The other end of the circuit@Control module harness
    • If 2 ohms or greater 

      Repair the open/high resistance in the circuit.

    • Go to next step: If less than 2 ohms 
  10. If all conditions test normal - Replace the appropriate component: B61P Seat Belt Tension Sensor - Passenger
  11. Operate the vehicle within the Conditions for Running the DTC.
  12. Verify DTC B0071 is not set.
    • If the DTC is set 

      Replace the component: K85 Passenger Presence Module

    • Go to next step: If the DTC is not set 
  13. All OK.
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