Circuit/System Verification

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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.

Impact sensor
SDM module
Impact sensor wiring harness connector
SDM wiring harness connector

NOTE:

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. Replace any CPA that is damaged or missing.

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.

Verify that DTC B0083-B0088 symptom byte 39 or 71 is not set as current.
- If symptom byte 39 or 71 is set as current, replace the appropriate B59 front impact sensor or B63 side impact sensor.
Verify that the SDM calibrations match the VIN data, software part number, and calibration part number.
- If not the correct data or part number, program the SDM.
Verify the correct impact sensors have the correct part numbers, matching the label part numbers with the parts book.
- If the part numbers do not match, replace the incorrect B59 front impact sensor or B63 side impact sensor
Verify that DTC B0083-B0088 symptom byte 01, 02, 04, 05, or 0C is not set as current.
- If symptom byte 01, 02, 04, 05, or 0C is set as current, refer to Circuit/System Testing.