18
19
Wheel Sensors
Wheel Speed and Modulator Control
19-55
GEAR PULSER
WHEEL SENSOR
at HIGH SPEED
at LOW SPEED
VO
LTAG
E
SPEED
VEHICLE SPEED
REEFRENCE VEHICLE SPEED
PRESSURE
ON
OUTLET
VALVE
OFF
INLET
VALVE ON
OFF
MOTOR
ON
OFF
WHEEL SPEED
TIME
The wheel sensors are the magnetic contactless type. As the gear pulser teeth rotate past the wheel sensor’s magnetic
coil, AC current is generated. The AC frequency changes in accordance with the wheel speed. The ABS control unit
detects the wheel sensor signal frequency and thereby detects the wheel speed.
When the wheel speed drops sharply below the vehicle speed, the inlet valve closes and if necessary the outlet valve
opens momentarily to reduce the caliper fluid pressure. The pump motor starts at this time. As the wheel speed is
restored, the outlet valve closes, and the inlet valve opens momentarily to increase the caliper fluid pressure.
03/07/29 09:55:43 61S0X050_190_0055
Summary of Contents for 2004 Odyssey
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Page 1527: ...Top View 20 162 Frame Frame Repair Chart...
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Page 1692: ...22 13 Roof REAR CONTROLLER and SCREEN With rear entertainment system...
Page 1696: ...22 17 1 2 BATTERY GROUND CABLE 3 4 5 6 ENGINE GROUND CABLE STARTER CABLE...
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