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Circuit/System Verification

WARNING: This page is about a different car, the 2020 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • 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.
    • Impact sensor
    • Restraints Control Module
    • Impact sensor wiring harness connector
    • Restraints Control 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. Ignition ON.
  2. Verify that DTC B17F1 symptom byte 81 is not set as current.
    • If DTC B17F1 symptom byte 81 is set as current 

      Replace the B63 Front Impact Sensor.

    • Go to next step: If DTC B17F1 symptom byte 81 is not set as current 
  3. Verify that DTC B17F1 symptom byte 11 or 15 is not set as current.
    • If DTC B17F1 symptom byte 11 or 15 is set as current 

      Replace the B63 Front Impact Sensor

    • Go to next step: If DTC B17F1 symptom byte 11 or 15 is not set as current 
  4. All OK.
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