Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY ACTIVE DTC
NOTE: If the scan tool shows this DTC has a Stored history of setting then the left front impact sensor is to be replaced. Make sure the battery is fully charged.
1. Turn the ignition ON.
2. With the scan tool, read ORC DTCs.
  Does the scan tool display active B0090-49-LEFT FRONTAL RESTRAINTS SENSOR - INTERNAL ELECTRONIC FAILURE DTC or did the DTC set the Stored history setting?
  
  Yes
  
  WARNING:
  Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
  - Replace the Left Front Impact Sensor in accordance with the Service Information. Refer to SENSOR, IMPACT, REMOVAL .
  - Perform the RESTRAINT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No (Did not set a active or stored DTC B0090-49- LEFT FRONTAL SENSOR - INTERNAL ELECTRONIC FAILURE)
  - Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Refer to STANDARD PROCEDURE .