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CONTENT
Common Abbreviations and Acronyms in This Manual………………………………… 2 I. Product Instruction………………………………………………………………………. 3 1. ABS Overview ……………………………………………………………………….. 3 1.1 System Function…………………………………………………………………… 3 1.2 Comparison between with and without ABS braking effects…………………... 3 2. System Structure…………………………………………………………………….. 5 3. System Functioning Theory…………………………………………………………. 6 3.1 ABS Control Theory………………………………………………………………… 6 3.2 ABS Control Mode……………………………………………………………….. 6 3.3 EBD Control Mode……………………………………………………………….. 9 II. Removal and Installation………………………………………………………………... 10 1. Spare Part Supply Status…………………...………………………………………. 10 2. Notices for Removal and Installation………………………………………………. 10 3. HECU Replacement…………………………………………………………………. 12 III. Trouble Diagnosis and Troubleshooting………………………………………………. 14 1. Checking Sequence…………………………………………………………...……… 14 2. Common Trouble Diagnosis and Troubleshooting of MGH-25 ABS……...……… 14 2.1 Checking of ABS and EBD Warning Lamp……………………...….…………... 14 2.2 Table for Common Troubles…………………….……………………………….. 14 2.3 Trouble Code Readout and Deletion without Trouble Diagnosis Instrument… 15 2.4 Trouble Checklist of Trouble Code……………………………………………… 17 2.5 Trouble Checklist without Trouble Code…………………...…………………… 25 IV. Air Discharge and Oil Refill……………………………...…………………………….. 30 1. Regular Operation Procedure………………………… ……………………………. 30 2. Checking Device……………………………………...………………………………… 30 3. Notices for Air Discharge and Oil Refill………………………………………………… 30 4. Determination Method for Vehicles with Air Discharge Trouble……...……………….. 31 5. Measures in Event of Troubles during Air Discharge and Oil Refill
(for internal dry status of brake system)………………………………………………… 31 6. Measures in Event of Trouble during Checking and ABS Functioning Test
(for internal wet status of brake system) ……………………………………………… 32 Annex I Malfunction Cases and Incorrect Repair Cases…………………………….. 34 Annex II ABS Basics……………………………………………………………..……... 36 Annex III ABS Internal hydraulic Flow Diagram………………………………….… 37 Annex IV Connector Pin Layout of MGH-25 ABS ECU……………….………….… 37
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