Circuit/System Verification
WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. 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.
- Knee air bag
- Inflatable restraint sensing and diagnostic module
- All wiring harness connectors
- 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.
- Verify the scan tool Deployment Loop Resistance parameters stay consistently between 2.1 and 4.0 Ω without any spikes or dropouts while moving the harness near each connector listed below:
- F114D Knee Air Bag - Driver
- F114P Knee Air Bag - Passenger
- Any inline harness connector
- 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
- Ensure each connector and CPA is correctly seated
- If between 2.1 and 4.0 Ω without any spikes or dropouts
- All OK