Using the DRB

Refer to the DRB user's guide for instructions and assistance with reading trouble codes, erasing trouble codes, and other DRB functions.

DRBII ERROR MESSAGES AND BLANK SCREEN
If any of the following error messages appear on the DRB screen, refer to the Vehicle Communications Manual for diagnosis and repair.

- cartridge error
- ram test failure
- keypad test failure
- low battery
- high battery

If the DRB has a blank screen, do the following:

- Ensure there is a good body ground at the data link connector, and that there is voltage at the connector.
- Use the process of elimination: Sequentially substitute another cable, cartridge, and DRB until the condition is corrected.

DRBIII ERROR MESSAGES AND BLANK SCREEN
Under normal operation, the DRB will display one of only two error messages:

User-Requested WARM Boot or User-Requested COLD Boot

If the DRB should display any other error message, record the entire display and call the scantool manufacturer for information and assistance. This is a sample of such an error message display:

ver: 2.14
date: 26 Jul93
file: key.itf.cc
date: Jul 26 1993
line: 548
err: Oxi
User-Requested COLD Boot

Press MORE to switch between this display and the application screen.
Press F4 when done noting information.

DRBIII DOES NOT POWER UP
If the LED's do not light or no sound is emitted at start up, check for loose cable connections or a bad cable. Check the vehicle battery voltage (data link connector cavity 2). A minimum of 11 volts is required to adequately power the DRB. Check for a good chassis ground (data link connector cavity 6).

If all connections are proper between the DRB and the vehicle or other devices, and the vehicle battery is fully charged, an inoperative DRB may be the result of faulty cable or vehicle wiring.

DISPLAY IS NOT VISIBLE
Low temperatures will affect the visibility of the display. Adjust the contrast to compensate for this condition.