Test 1A - Trouble Codes
Battery must be fully charged before proceeding. Trouble codes displayed will fit 2 categories: scan tool trouble codes and bus trouble codes. Connect scan tool to Data Link Connector (DLC) to retrieve trouble codes. See TROUBLE CODES table and proceed to appropriate test number. If scan tool screen is blank, go to TEST 2A.
TROUBLE CODES
| Trouble Codes | Test No. | |
|---|---|---|
| Scan Tool Trouble Codes | ||
| RAM TEST FAILURE | 3A | |
| CARTRIDGE ERROR | 4A | |
| KEY PAD TEST FAILURE | 5A | |
| LOW OR HIGH BATTERY | 6A | |
| Bus Trouble Codes | ||
| BUS SHORT TO BATTERY | 7A | |
| BUS SHORT TO 5 VOLTS | 8A | |
| BUS 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 | |