Diagnosing Customer Concerns Without Hard DTCs

If the customer reports an air bag warning indicator lamp flashing (5Hz) or on continuously, but is not present when the vehicle comes in for service, follow the Diagnostic Instruction procedures in this article to identify the intermittent DTC.

Once the DTC is known, read the Normal Operation portion of the pinpoint test for the DTC involved.

• Follow the deactivation or depowering procedure as directed in this article.
• Determine the location of components involved in creating the DTC.
• Carry out a thorough visual inspection of:
  • components.
  • connectors.
  • splices and wiring harnesses.
  • insulation on conductors.

Refer to the Possible Causes portion of the pinpoint test for the DTC involved, which lists the common concerns that relate to the DTC. Concerns are listed according to priority.