Test 1A: Checking System For Faults
- Using DRB, read fault messages. If DRB is showing a blank message screen, go to TEST 18A. If DRB is displaying NO RESPONSE message, go to TEST 17A. If no fault messages are present, turn ignition off and on. Using DRB, read fault messages. Monitor display for 4 minutes. If no fault messages are present, perform TEST VER-1A. If fault messages are present, go to next step.
- In some cases, cause of one fault message may set additional fault messages. If multiple fault messages appear on DRB, fault repairs must be performed in order they appear in FAULT MESSAGES table. If only one fault is set, perform indicated test for that fault message.
FAULT MESSAGES
| DRB Message | Test No. | ||
|---|---|---|---|
| CAB | (1) | ||
| MODULATOR | TEST 9A | ||
| SYSTEM RELAY | TEST 16A | ||
| PUMP/MOTOR | TEST 10A | ||
| SOLENOID UNDERVOLTAGE | TEST 15A | ||
| ANTILOCK LAMP DIODE CIRCUIT | TEST 2A | ||
| ANTILOCK LAMP CIRCUIT | TEST 3A | ||
| EXCESS DECAY | TEST 4A | ||
| LF WHEEL SPEED SENSOR | TEST 5A | ||
| LR WHEEL SPEED SENSOR | TEST 6A | ||
| LF WSS CONTINUITY | TEST 7A | ||
| LR WSS CONTINUITY | TEST 8A | ||
| RF WSS CONTINUITY | TEST 11A | ||
| RF WHEEL SPEED SENSOR | TEST 12A | ||
| RR WHEEL SPEED SENSOR | TEST 13A | ||
| RR WSS CONTINUITY | TEST 14A | ||
| NO RESPONSE | TEST 17A | ||
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