Test 1A - Checking System For Faults
NOTE:
Perform VISUAL INSPECTION
before proceeding.
- Using scan tool, read fault messages. If scan tool is showing a blank message screen, go to TEST 18A. If scan tool is displaying NO RESPONSE message, go to TEST 17A. If no fault messages are present, go to next step.
- Turn ignition off and then on. Monitor scan tool display for 4 minutes. If no fault messages are present, perform TEST VER-1A. If fault message present, perform indicated test. See FAULT MESSAGES table. In some cases, cause of one fault message may set additional fault messages. If multiple fault messages appear on scan tool, repair faults in the order displayed.
FAULT MESSAGES
| Scan Tool Message | See Test | ||
|---|---|---|---|
| Controller Anti-Lock Brake (CAB) | (1) * | ||
| ABS WARNING LAMP DIODE CIRCUIT | TEST 2A | ||
| ABS WARNING LAMP CIRCUIT | TEST 3A | ||
| EXCESS DECAY | TEST 4A | ||
| LF WHEEL SPEED SENSOR | TEST 5A | ||
| LR WHEEL SPEED SENSOR | TEST 6A | ||
| LF WHEEL SPEED SENSOR CONTINUITY | TEST 7A | ||
| LR WHEEL SPEED SENSOR CONTINUITY | TEST 8A | ||
| MODULATOR CIRCUIT | TEST 9A | ||
| PUMP/MOTOR CIRCUIT | TEST 10A | ||
| RF WHEEL SPEED SENSOR CONTINUITY | TEST 11A | ||
| RF WHEEL SPEED SENSOR | TEST 12A | ||
| RR WHEEL SPEED SENSOR | TEST 13A | ||
| RR WHEEL SPEED SENSOR CONTINUITY | TEST 14A | ||
| SOLENOID UNDERVOLTAGE | TEST 15A | ||
| SYSTEM RELAY CIRCUIT | TEST 16A | ||
| NO RESPONSE | TEST 17A | ||
| Blank Scan Tool Screen | TEST 18A | ||
| VERIFICATION PROCEDURE | TEST VER-1A | ||
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