Test 1A - Trouble Codes
Battery must be fully charged before proceeding. Trouble codes displayed will fit 2 categories: DRB trouble codes and bus trouble codes. Connect DRB to Data Link Connector (DLC) to get trouble code. See TROUBLE CODES table and proceed to appropriate test number. If DRB screen is blank, go to TEST 2A.
TROUBLE CODES
| Trouble Codes | Test No. | |
|---|---|---|
| DRB Trouble Codes | ||
| RAM TEST FAILURE | 3A | |
| CARTRIDGE ERROR | 4A | |
| KEY PAD TEST FAILURE | 5A | |
| LOW OR HIGH BATTERY | 6A | |
| Bus Trouble Codes | ||
| SHORT TO BATTERY | 7A | |
| SHORT TO 5 VOLTS | 8A | |
| SHORT TO GROUND | 9A | |
| BUS (+) & BUS (-) SHORTED TOGETHER | 10A | |
| NO TERMINATION | 11A | |
| BUS BIAS LEVEL TOO LOW | 12A | |
| BUS BIAS LEVEL TOO HIGH | 12A | |
| BUS (+) OPEN | 12A | |
| BUS (-) OPEN | 12A | |
| BUS (+) & (-) OPEN | 12A | |
| NO BUS BIAS | 13A | |
| NOT RECEIVING BUS MESSAGES CORRECTLY | 14A | |