Download NOTE: Diagnostic Trouble Code (DTC) Recognition 1. ABS control unit recognizes system related problems and causes ABS warning light to come on and stay on under any of following conditions: Vehicle is driven with parking brake on longer than 30 seconds. One rear wheel is locked. Wheel speed sensor does not transmit a signal. Vehicle is driven on extremely rough road. Low battery voltage. Operation time of solenoid valves exceeds a specified value and control unit indicates an open circuit in solenoid circuit. Output signals from control unit are not transmitted to solenoid valves. Temporary loss of traction due to excessive cornering speed or starting from stuck condition (mud, snow or sand). 2. If ABS warning light comes on intermittently, use ABS Tester (07HAJ-SG0010B) to confirm problem. See ABS FUNCTION TEST under DIAGNOSIS & TESTING. 3. ABS warning light comes on and trouble code is stored in control unit when insufficient battery voltage exists at control unit. If low battery voltage caused problem, recharge battery and clear trouble code(s). See CLEARING DTCs under SELF-DIAGNOSTICS.