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 .

Fig 1: Locating Anti-Lock Control Unit Access Cover

Courtesy of AMERICAN HONDA MOTOR CO., INC.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Retrieving Codes