RE: Đèn ABS sáng
ANTI-LOCK BRAKE SAFETY PRECAUTIONS
1995 Honda Accord
* NEVER open a bleeder valve or loosen a hydraulic line while ABS is pressurized.
* NEVER disconnect or reconnect any electrical connectors while ignition is on. Damage to ABS control unit may result.
* DO NOT attempt to bleed hyudarulic system without first referring to the appropriate ANTI-LOCK BRAKE SYSTEM article in the BRAKES section.
* Only use specially designed brake hoses/lines on ABS equipped vehicles.
* DO NOT tap on speed sensor components (sensor, sensor rings). Sensor rings must be pressed into hubs, NOT hammered into hubs. Striking these components can cause demagnetization or
a loss of polarization, affecting the accuracy of the speed signal returning to the ABS control unit.
* DO NOT mix tire sizes. Increasing the width, as long as tires remain close to the original diameter, is acceptable. Rolling diameter must be identical for all 4 tires. Some manufacturers recommend tires of the same brand, style and type. Failure to follow this precaution may cause inaccurate wheel speed readings.
* DO NOT contaminate speed sensor components with grease. Only use recommended coating, when system calls for an anti-corrosion coating.
* When speed sensor components have been removed, ALWAYS check sensor-to-ring air gaps when applicable. These specifications can be found in each appropriate article.
* ONLY use rocommended brake fluids. DO NOT use silicone brake fluids in an ABS equipped vehicle.
* When instlling transmittion devices (CB's, telephones, etc.) on ABS equipped vehicles, DO NOT locate the antenna near the ABS control unit (or any control unit).
* Disconnect all on-board computers, when using electric welding equipment.
* DO NOT expose the ABS control unit to prolonged periods of high heat (185 øF/85øC for 2 hours is generally considered a maximum limit).
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ANTI-LOCK (ABS) WARNING LIGHT
NOTE: ABS system is okay if ABS warning light goes out after engine is started.
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).
ABS Warning Light Stays On Without DTCs
If ABS warning light stays on and no DTCs have been stored in control unit, check for following items:
* Loose or poor control unit connector.
* Blown ABS fuse No. B2 in underhood fuse/relay box.
* Open circuit in White/Black wire between ABS fuse No. B2 and control unit.
* Open circuit in Yellow/Black wire between fuse No. 7 and fail-safe relays.
* Short circuit in Blue/White wire between instrument cluster and control unit.
* Open circuit in White/Blue wire between alternator and control unit.
If problem cannot be found, substitute a known good control unit, and retest.
ABS Warning Light Stays On With DTCs
Clearing DTCs
With ignition off, remove ABS fuse No. B2 (15-amp) for at
least 3 seconds. Install fuse, and turn ignition on. Observe ABS
warning light. DTCs are cleared if ABS warning light goes out after
engine is started.
DIAGNOSTIC TROUBLE CODES (DTCS) TABLE
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DTC..............................................
System Affected
1, 1-2, 1-3, 1-4, 1-8 ....................Hydraulically Controlled Components
2-1 ...........................................Parking Brake Switch
3-1, 3-2, 3-4, 3-8 ........................Pulser(s)
3-12 ..........................................Different Tire Diameter
4-1, 4-2, 4-4, 4-8 ........................Front & Rear Speed Sensor(s)
5, 5-4, 5-8 .................................Rear Wheel Lock
6, 6-1, 6-4 .................................Front & Rear Fail-Safe Relay(s)
7-1, 7-2, 7-4 ..............................Front & Rear Solenoid(s)
8-1, 8-2, 8-4 ..............................ABS Function/Control Unit
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