Retrieving Codes
- Turn engine off. Turn ignition on. Ensure ANTI-LOCK warning light comes on. Start engine and check ANTI-LOCK warning light. If warning light goes out, no fault codes exist.
- If light remains on, turn engine off. Remove the anti-lock control unit access cover. See Fig 1 .
- Turn ignition on, but DO NOT start engine. Record flashing frequency of control unit LED light.
- Turn ignition on, but DO NOT start engine. ANTI-LOCK warning light should start flashing Diagnostic Trouble Codes (DTC). If light does not flash DTC, go to ANTI-LOCK WARNING LIGHT STAYS ON under COMPONENT TESTS.
- First number of code indicates main code. See Fig 2 . Second number indicates sub code. See DIAGNOSTIC TROUBLE CODES table. A one-second pause separates main and sub codes. An approximate 10-second delay should occur before LED starts blinking after ignition is turned on. Total of 3 codes can be set at one time. There is a 5-second pause between DTCs. To recheck sequence, turn ignition off for a few seconds and then turn ignition back on. To diagnose DTCs, go to appropriate test under DIAGNOSTIC TESTS .
DIAGNOSTIC TROUBLE CODES
| Code | System Affected |
|---|---|
| 1 | Hydraulic Controlled Components |
| 2 | Parking Brake Switch |
| 3-1 To 3-4 | Pulser(s) |
| 4-1 To 4-8 | Wheel Speed Sensor(s) |
| 5-4 To 5-8 | Rear Speed Sensor(s) |
| 6-1 | Front Fail-Safe Relay Circuit |
| 6-4 | Rear Fail-Safe Relay Circuit |
| 7-1 & 7-2 | Front Solenoid(s) |
| 7-4 | Rear Solenoid |