Mazda RX-8 2004 - Page 266

ON-BOARD DIAGNOSTIC
05–02–1
05–02
05–02 ON-BOARD DIAGNOSTIC
ON-BOARD DIAGNOSTIC (OBD)
SYSTEM OUTLINE . . . . . . . . . . . . . . . . 05–02–1
ON-BOARD DIAGNOSTIC (OBD)
SYSTEM BLOCK DIAGRAM . . . . . . . . 05–02–1
MALFUNCTION DETECTION
FUNCTION . . . . . . . . . . . . . . . . . . . . . . 05–02–2
Malfunction Detection Function . . . . . . 05–02–2
DTC Table . . . . . . . . . . . . . . . . . . . . . . 05–02–2
MEMORY FUNCTION . . . . . . . . . . . . . . . 05–02–3
MALFUNCTION INDICATION
FUNCTION . . . . . . . . . . . . . . . . . . . . . . . 05–02–3
FAIL-SAFE FUNCTION . . . . . . . . . . . . . . 05–02–3
PARAMETER IDENTIFICATION (PID)
DATA MONITORING FUNCTION . . . . . 05–02–8
Monitor Item Table . . . . . . . . . . . . . . . . 05–02–8
SIMULATION FUNCTION . . . . . . . . . . . . 05–02–8
Simulation Item Table . . . . . . . . . . . . . . 05–02–8
DLC-2 OUTLINE. . . . . . . . . . . . . . . . . . . . 05–02–9
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ON-BOARD DIAGNOSTIC (OBD) SYSTEM OUTLINE
CHU050201026S01
• The OBD system has the following functions:
— Malfunction detection function: detects malfunctions of the input/output devices and system components of
the AT.
— Fail-safe function: fixes the output device function and input value of the sensors/switches to ensure
minimum vehicle drivability when a failure is detected.
— Memory function: stores the DTC when a failure is detected.
— PID data monitoring function: monitors the input/output signal and calculated value of the TCM and sends
the monitoring data to the scan tool.
— Simulation function: Allows override operation of simulation items for input/output system parts preset in the
TCM.
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ON-BOARD DIAGNOSTIC (OBD) SYSTEM BLOCK DIAGRAM
CHU050201026S02
TCM
OBD SYSTEM
MEMORY
FUNCTION
MALFUNCTION INDICATION
FUNCTION
SERIAL COMMUNICATION
MALFUNCTION
DETECTION
FUNCTION
PID DATA
MONITORING
FUNCTION
SIMULATION
FUNCTION
FAIL-SAFE
FUNCTION
INPUT
PARTS
TRANSMISSION CONTROL SYSTEM
OUTPUT
PARTS
DLC-2
WDS OR
EQUIVALENT
INSTRUMENT CLUSTER
CAN
AT WARNING LIGHT OR MIL
CHU0502S001