Mazda 2002 Millenia Spezifikationen PDF herunterladen (Seite 226)

T10

MULITIPLE COMMUNICATION SYSTEM

ON-BOARD DIAGNOSTIC FUNCTION

A6E811155430T09

Outline

• The on-board diagnostic function is incorporated into the PCM, ABS (ABS/TCS) HU/CM (with ABS (ABS/

TCS)), DSC HU/CM (with DSC), and instrument cluster. This function can narrow down CAN system

malfunction locations.

• The on-board diagnostic function consists of the following functions: a failure detection function, which detects

malfunctions in CAN system-related parts; a memory function, which stores detected DTCs; a self-malfunction

diagnostic function, which indicates system malfunctions using DTCs and warning lights; and a PID/data

monitoring function, which verifies the input/output condition of specific input/output signals being read out.

• Using an SST (WDS or equivalent), DTCs can be read out and deleted, and the PID/data monitoring function

can be activated.

• The CAN system has a fail-safe function. When a malfunction occurs in CAN system, the transmission module

sends a warning signal and the receiving module illuminates the warning light.

Block Diagram

Failure detection function

• The failure detection function in each CAN system-related module detects malfunctions in input/output signals.

• This function outputs the DTC for the detected malfunction to the DLC-2, and also sends the detected result to

the memory function and fail-safe function.

Fail-Safe Function

• When the failure detection function determines that there is a malfunction, the fail-safe function illuminates a

warning light to advise the driver of the malfunction.

Memory Function

• The memory function stores the DTC for the malfunction of input/output signals for related parts, as determined

by the failure detection function.

A6E8111T007

1 ABS (ABS/TCS) HU/CM or DSC HU/CM

2 Instrument cluster

3 Twist pair

Module Fail-safe functionì®Ì§ä

PCM • MIL illuminated

• ABS (ABS/TCS) HU/CM

(with ABS (ABS/TCS))

• DSC HU/CM (with DSC)

• ABS (ABS/TCS) suspended (with ABS (ABS/TCS))

• DSC suspended (with DSC)

• ABS warning light illuminated

• DSC/TCS indicator light illuminated

• DSC OFF light illuminated

• TCS OFF light illuminated

Instrument cluster

• Speedometer, tachometer, water temperature gauge: 0 displayed

• MIL illuminated

• ABS warning light illuminated

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