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