T–6
MULTIPLEX COMMUNICATION SYSTEM
ON-BOARD DIAGNOSTIC FUNCTION
A6E811155430205
Outline
• The on-board diagnostic function is incorporated into the PCM, TCM, ABS (ABS/TCS) HU/CM (with ABS (ABS/
TCS)), DSC HU/CM (with DSC), 4WD control module, and instrument cluster. This function can narrow down
CAN system malfunction locations.
• Due to the adoption of the TCM and the 4WD CM, some DTCs and PID/data monitor items have been added.
Other functions are the same as those of the current Mazda6 (GG) model.
Block Diagram
.
Fail-Safe Function
• When the failure detection function detemines that there is a malfunction, the fail-safe function illuminates a
warning light to advise the driver of the malfunction.
1
3
2
4
5
6
A6E81111103
1PCM
2 TCM (JA5AX-EL)
3 ABS (ABS/TCS) HU/CM or DSC HU/CM
4 4WD control module (4WD)
5 Instrument cluster
6Twist pair
Module Fail-safe function
PCM • MIL illuminated
TCM • AT warning light 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
4WD control module • 4WD indicator light illuminated
Instrument cluster • Speedometer, tachometer, water temperature gauge: 0 displayed
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