LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B001C or B001D >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • Refer to SIR Service Precautions .
  • Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
    • Pyrotechnic rollover bar actuator
    • Inflatable restraint sensing and diagnostic module
    • Pyrotechnic rollover bar actuator wiring harness connector
    • Inflatable restraint sensing and diagnostic module wiring harness connector
  • The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and 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 or cannot be duplicated, disconnect the connectors and add dielectric grease / lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087). This procedure will correct the high resistance condition due to terminal fretting corrosion.
  1. Verify the scan tool Deployment Loop Resistance 1 and 2 parameters stay consistently between 2.1 and 4.0 Ω without any spikes or dropouts while moving the harness near each connector listed below:
    • F121 Pyrotechnic Rollover Bar Actuator
    • Any inline harness
    • K36 Inflatable Restraint Sensing and Diagnostic Module
    • If less than 2.1 or greater than 4.0 Ω 

      Refer to Circuit/System Testing.

    • If there are spikes or dropouts, perform the following 
    • Inspect each connector terminal and harness for damage or corrosion and repair as necessary
    • Apply dielectric grease / lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087) to each connector terminal
    • Insure each connector and CPA is correctly seated.
    • Go to next step: If within 2.1 and 4.0 Ω without any spikes or dropouts 
  2. All OK
scientia non olet · About LEMON Manuals