Mazda RX-8 2004 - Page 344

ON-BOARD DIAGNOSTIC
06–02–1
06–02
06–02 ON-BOARD DIAGNOSTIC
ON-BOARD DIAGNOSTIC SYSTEM
OUTLINE (ELECTRIC POWER
STEERING) . . . . . . . . . . . . . . . . . . . . . . 06–02–1
Block Diagram . . . . . . . . . . . . . . . . . . . 06–02–1
ON-BOARD DIAGNOSTIC SYSTEM
FUNCTION (ELECTRIC POWER
STEERING) . . . . . . . . . . . . . . . . . . . . . . 06–02–2
Malfunction Detection Function . . . . . . 06–02–2
Malfunction Display Function . . . . . . . . 06–02–2
Memory Function . . . . . . . . . . . . . . . . . 06–02–2
Fail-safe Function . . . . . . . . . . . . . . . . 06–02–2
ON-BOARD DIAGNOSTIC SYSTEM
PID/DATA MONITOR FUNCTION
(ELECTRIC POWER STEERING) . . . . . 06–02–3
ON-BOARD DIAGNOSTIC SYSTEM
ACTIVE COMMAND MODE FUNCTION
(ELECTRIC POWER STEERING) . . . . . 06–02–3
ON-BOARD DIAGNOSTIC SYSTEM
EXTERNAL TESTER
COMMUNICATION FUNCTION
(ELECTRIC POWER STEERING) . . . . . 06–02–4
Outline . . . . . . . . . . . . . . . . . . . . . . . . . . 06–02–4
DLC-2 CONSTRUCTION . . . . . . . . . . . . . 06–02–5
End of Toc
ON-BOARD DIAGNOSTIC SYSTEM OUTLINE (ELECTRIC POWER STEERING)
CHU060201038S01
• 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 data monitor function that reads out specified
input/output signals and a simulation function that allows for override operation of output parts and is used to
set the system to the neutral position.
• The Data Link Connector 2 (DLC-2), which groups together all the connectors used for malfunction diagnosis
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 data monitor and simulation functions, providing enhanced malfunction
diagnosis and improved serviceability.
Block Diagram
End Of Sie
WDS OR
EQUIVALENT
OUTPUT
PARTS
INPUT
PARTS
EPS NORMAL CONTROL AREA
DATA
MONITOR
FUNCTION
MALFUNCTION
DETECTION
FUNCTION
ON-BOARD DIAGNOSTIC
FUNCTION
EXTERNAL
TESTER
COMMUNICATION
FUNCTION
MEMORY
FUNCTION
FAIL-SAFE
FUNCTION
ACTIVE
COMMAND
FUNCTION
DLC-2
CAN
DRIVER
EPS WARNING
LIGHT
OTHER UNIT
(PCM)
EPS CONTROL MODULE
MALFUNCTION
INDICATION
FUNCTION
CHU0602S003