ON-BOARD DIAGNOSTIC SYSTEM OUTLINE [L3]
BUE040200000N01
• The on-board diagnostic system consists of a malfunction detection system that detects abnormalities in input/output signals when the ignition switch is at the ON position, a PID/data monitor function that reads out specified input/output signals and a active command modes function that allows for override operation of output parts (such as solenoid valves).
• The data link connector 2 (DLC-2), which groups together all the connectors used for malfunction diagnosis and detecting/repair into a single location, has been adopted, thereby improving serviceability. Diagnosis is performed by connecting the WDS or equivalent to the DLC-2.
• In addition to DTC read-out, the WDS or equivalent is used to clear DTCs using the display screen of the diagnostic tester, and to access the PID/data monitor and active command modes functions, providing enhanced malfunction diagnosis and improved serviceability.
Block Diagram
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1
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ABS warning light
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2
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Brake system warning light
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3
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On-board diagnostic function
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4
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Memory function
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5
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Malfunction display function
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6
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Serial communication
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7
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Malfunction detection function
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8
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PID/DATA monitor function
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9
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Active command modes function
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10
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Fail-safe function
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11
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HU inspection function
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12
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Input device
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13
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Normal control area
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14
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Output device
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15
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WDS or equivalent
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