Mazda 2002 6 Workshop Manual page 637

Terminal Signal
S Combine sensor
Yaw rate
T
(yaw rate signal)
Steering angle
U
(neutral signal)
V —
Steering angle
W (steering angle
signal 2)
Steering angle
X (steering angle
signal 1)
Combine sensor
Y
(ground)
AA DSC OFF switch
AB OBD
Auto cruise set
AC
signal output
AD —
Vehicle speed
AE
output
AF CAN-L
AG CAN-H
AH —
*
: Used for vehicle manufacturing, not used for DSC.
Inspection Using An Oscilloscope (Reference)
Steering angle (steering angle signal 1 and 2)
• DSC HU/CM terminal:
Steering angle signal 2 : W ( + ) — R ( - )
Steering angle signal 1 : X ( + ) — R ( - )
• Oscilloscope setting:
1 V/DIV (Y), 25 ms/DIV (X), DC range
• Vehicle condition: Rotating steering wheel at one
revolution per second
Note
• As steering wheel rotation speed increases,
period of wave shortens.
• As for shape of steering angle signals 1 and
2, the phase is different.
DYNAMIC STABILITY CONTROL
Connected to Test condition
Combine
sensor
Vehicle is stopped
Right cornering
Combine
sensor
Left cornering
Steering position:
Steering angle
center position 25°—29°
sensor
Except above condition
—
• Inspect using the wave profile.
Steering angle
(See P–41 Inspection Using An
sensor
Oscilloscope
• Inspect using the wave profile.
Steering angle
(See P–41 Inspection Using An
sensor
Oscilloscope
Combine
sensor
When switch is pressed
DSC OFF
switch
When switch is not pressed
It cannot be determined with terminal
voltage whether the condition is good or bad
KLN terminal of
because advanced function diagnostic
DLC-2
output is performed with serial
communication. Inspect with service codes.
When auto cruise is ON
Auto cruise unit
When auto cruise is OFF
—
Audio unit, Vehicle is stopped
Wiper and
washer switch,
• Inspect using the wave profile.
Car-navegation
unit, Auto
(See P–41 Inspection Using An
leveling control
Oscilloscope
unit, Cruise
actuator
—
—
—
Voltage (V)
— 3.5—5.0
2.3—2.7
Fluctuation
between
2.5—4.62
Fluctuation
between
2.5—0.33
Below 1.0
Approx. 4
— —
(Reference))
(Reference))
— Below 1.0
Below 1.0
B+
Below 1.0
B+
— —
0
(Reference))
No need to
—
check
No need to
—
check
— —
Action
• Inspect related harness
• Inspect combine sensor
• Inspect related harness
• Inspect yaw rate sensor
• Inspect related harness
• Inspect steering angle
sensor
—
• Inspect related harness
• Inspect steering angle
sensor
• Inspect related harness
• Inspect steering angle
sensor
• Inspect related harness
• Inspect combine sensor
• Inspect related harness
• Inspect DSC OFF switch
• Inspect related harness
• Inspect DSC HU/CM
• Inspect related harness
• Inspect DSC HU/CM
—
• Inspect related harness
• Inspect front wheel-speed
sensor
—
—
—
A6E6921W014
P–41
P