Circuit/System Verification
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.
- Seat belt retractor pretensioner
- Passenger instrument panel air bag
- Seat Side air bag
- Roof rail air bag
- SDM
- SDM wiring harness connector
- Seat belt retractor pretensioner connector
- Passenger instrument panel air bag wiring harness connector
- Seat Side Air Bag wiring harness connector
- Roof rail air bags 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.
Observe the scan tool Deployment Loop Resistance parameters while moving the harness near each connector listed below. The reading should stay consistently between 1.7 and 4.2 Ω without any drop outs or spikes.
- Passenger instrument panel air bag
- Roof rail air bag
- Seat side air bag
- Seat belt retractor pretensioner
- Any inline harness
- SDM
- If the reading is erratic while moving the harness, perform the following;
- Inspect each connector terminal 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.