P–8
DYNAMIC STABILITY CONTROL
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COMBINE SENSOR (FORWARD-G SENSOR)
A6E692067650202
Function
• The forward-G sensor is integrated with the combine sensor to detect and calculate the vehicle forward-G force
and change in voltage to the DSC HU/CM.
Structure/Operation
• The drive train of 4WD vehicles delivers driving force to all four wheels, and due to this interlocking, the speed
of all wheels during braking is the same. When driving on road surfaces with especially low m (friction
coefficient), it is difficult to estimate the vehicle speed based on the wheel speed, and DSC braking becomes
unreliable. (For 2WD vehicles, the front and rear wheels are independent, so it is possible to accurately
estimate the vehicle speed by measuring the difference between the rotation speeds of the front and rear tires.)
A forward-G sensor has been installed to overcome this situation. When braking, the change in G-force is
detected, and the road surface m is judged (low m, high m), enabling a correction of the vehicle speed
estimation.
• The output voltage characteristic for the combine sensor is 2.5 V when the vehicle is standing still, and
changes accordingly as forward-G is formed.
• Forward-G is formed when the sensor detects an inertial force created by, and in proportion to, a G- force
acting on a silicon detection component.
.
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CONTROLLER AREA NETWORK (CAN)
A6E692067650203
• ABS (ABS/TCS) or DSC HU/CM transmit/receive information through CAN. Due to the addition of TCM, 4WD
CM, and the MZR-CD (RF Turbo) engine model, the following information has been changed. For detailed
information on CAN, see the “CONTROLLER AREA NETWORK.” (See T–3 OUTLINE.)
Transmitted Information
• Coupling torque request (to 4WD CM)
• DSC operating condition (to 4WD CM)
Received Information
• Coupling torque (from 4WD CM)
• Shift position (from TCM)
• Fuel injection information (only MZR-CD (RF Turbo), from PCM)
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(V)
2.5
-14.7
0
+14.7
(m/s
2
)
4 5
3
6
2
1
A6E6920W201
1 External view
2 Front of vehicle
3 Output voltage characteristic
4 Deceleration
5 Forward-G
6 Acceleration
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