Toyota Motor Corp. said Wednesday it will deliver 150 more devices to North America to read data stored in the event data recorder, or "black box," installed in all Toyota cars sold there.

An EDR is an automobile's equivalent of an airplane's flight data recorder. It records specific vehicle information in the event of air bag deployment or significant impact, as well as data to help understand how a vehicle's various systems functioned in a crash.

The devices needed to read the recorders are in short supply in North America, with only one having been available there until recently.

The decision to deploy more devices is part of Toyota's safety-enhancing drive in the wake of recent massive recalls involving popular models due to defective gas pedals.

Toyota said it wants the new readout units to assist in accident investigations and, where appropriate, the evaluation of reports of unintended acceleration where there was impact or vehicle damage.

"By increasing the number of event data recorder readout devices and training more staff across the country, Toyota is better prepared to respond to customer concerns quickly and address their needs more effectively," Steve St. Angelo, Toyota chief quality officer for North America, said in a statement.

Toyota has delivered 10 of the devices to the U.S. National Highway Traffic Safety Administration and four to Transport Canada.