Test 7A - Bus Failure Messages
Select error message and corresponding test from BUS FAILURE MESSAGES table. Proceed to self-diagnostic test indicated. Each specific error message is diagnosed by following a specific testing sequence. It is not necessary to perform all tests to diagnose an individual error message.
BUS FAILURE MESSAGES
| Message | Test No. |
|---|---|
| BUS BIAS LEVEL TOO HIGH | 14A |
| BUS BIAS LEVEL TOO LOW | 13A |
| BUS (+) OPEN | 16A |
| BUS (-) OPEN | 17A |
| BUS (+) & (-) OPEN | 18A |
| BUS (+) & BUS (-) SHORTED TOGETHER | 11A |
| SHORT TO BATTERY | 8A |
| SHORT TO GROUND | 10A |
| SHORT TO 5 VOLTS | 9A |
| NO BUS BIAS | 15A |
| NOT RECEIVING BUS MESSAGES CORRECTLY | 19A |
| NO TERMINATION | 12A |