Mazda RX-8 2004 Service Highlights page 536

Block diagram
EPS
CONTROL
MODULE
2M
4V
PCM
4S
TWISTED PAIR
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 inform the driver of the malfunction.
Module
PCM
EPS control module
TCM
ABS HU/CM (with ABS)
DSC HU/CM (with DSC)
Keyless control module
TPMS control module
Steering angle sensor (with DSC)
Instrument cluster
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.
Self-malfunction diagnostic function
• The self-malfunction diagnostic function determines that there is a malfunction, and outputs a signal, as a DTC,
to the DLC-2. The DTC can be read out using an SST (WDS or equivalent).
09–40–6
CONTROL SYSTEM
AT
TCM
2K
1V 1Y
O R
WITH ABS
ABS HU/CM
H I
WITH DSC
DSC HU/CM
• MIL illuminated
• EPS warning light illuminated
• AT warning light illuminated
• ABS suspended
• TCS suspended
• DSC suspended
• ABS warning light illuminated
• DSC indicator light illuminated
• DSC OFF light illuminated
• Send malfunction data to DSC HU/CM
• Speedometer, tachometer, water temperature gauge: 0 displayed
KEYLESS
CONTROL
MODULE
3A 3B
G
E
TPMS
CONTROL
MODULE
Fail-safe function
–
–
–
WITH DSC
STEERING
ANGLE
SENSOR
E
F
1J
INSTRUMENT
CLUSTER
1L
E
F
DLC-2
: CAN_H
: CAN_L
CHU0940S002