Using DRB

NOTE: Although other scan testers are available, manufacturer recommends using Diagnostic Readout Box (DRB) to diagnose the system. DRB receives information through the Data Link Connector (DLC). DLC may also be referred to as the engine diagnostic connector.

Ensure DRB is connected to data link connector located in engine compartment. Ensure correct cartridge is installed in DRB for vehicle and system being diagnosed. Menu selections will vary depending on vehicle and system being diagnosed. Follow DRB screen prompts to actuate, adjust, monitor, reset, test and diagnose system as necessary.

DRB is grounded through the DLC. Only one volt-ohmmeter test lead is required when using volt-ohmmeter option. DRB volt-ohmmeter should only be used when self-diagnostic tests require the use of this option.

If DRB has a blank screen or displays RAM TEST FAILURE, CARTRIDGE ERROR, KEY PAD TEST FAILURE or LOW BATTERY OR HIGH BATTERY, this indicates a DRB failure. To diagnose and correct these conditions, see VEHICLE COMMUNICATIONS in appropriate TESTS W/CODES - BODY CONTROL COMPUTER article in the ENGINE PERFORMANCE section.