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Circuit/System Testing

NOTE:
  • Refer to: SIR Service Precautions
  • The connector position assurance (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 or lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087). This procedure will correct the high resistance condition due to terminal fretting corrosion.
  • If the condition is intermittent, wiggle the related wiring harnesses and connectors, with the ignition/vehicle on or engine running, while monitoring the scan tool circuit status parameters for the component. The parameters will display if there is a condition with the circuit or a connection.
  • Inspect the terminals of the following components and connectors for damage or corrosion and repair or replace as necessary:
    • P14 Passenger Air Bag Disabled Indicator & Harness Connector
    • K36 Inflatable Restraint Sensing and Diagnostic Module & Harness Connector
  1. Ignition Off
  2. Disconnect the component: P14 Passenger Air Bag Disabled Indicator
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 1 & Ground
    • If 10 ohms or greater 
    1. Ignition Off
    2. Test for less than 2 ohms between the test points: Ground circuit & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Connect a test lamp between the test points: Control circuit terminal 4 & Ground
  5. Ignition - On/Vehicle - In Service Mode
  6. Perform the scan tool control function: Passenger Seat Belt Reminder Indicator - On and Off
    • If the test lamp is always On 
    1. Ignition Off
    2. Disconnect the electrical connector: K36 Inflatable Restraint Sensing and Diagnostic Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Control Circuit & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component: K36 Inflatable Restraint Sensing and Diagnostic Module
    • If the test lamp is always Off 
    1. Disconnect the electrical connector: K36 Inflatable Restraint Sensing and Diagnostic Module
    2. Test for infinite resistance between the test points: Control Circuit & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
    3. Test for less than 2 ohms between the test points: Control Circuit @ Component harness & The other end of the circuit
    4. Test for less than 2 ohms between the test points: Ground @ Component harness & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K36 Inflatable Restraint Sensing and Diagnostic Module
    • Go to next step: If the test lamp turns On and Off 
  7. Replace the appropriate component: P14 Passenger Air Bag Disabled Indicator
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