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 | TEST 3A | |
| CARTRIDGE ERROR | TEST 4A | |
| KEY PAD TEST FAILURE | TEST 5A | |
| LOW OR HIGH BATTERY | TEST 6A | |
| Bus Trouble Codes | ||
| BUS SHORT TO BATTERY | TEST 7A | |
| BUS SHORT TO 5 VOLTS | TEST 8A | |
| BUS 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 (+) & (-) OPEN | TEST 12A | |
| NO BUS BIAS | TEST 13A | |
| NOT RECEIVING BUS MESSAGES CORRECTLY | TEST 14A | |