Valve Operation and Air Flow
In the figure below, divided by the diaphragm, the part above X is charged with atmospheric air pressure, and the part below X is charged with tank pressure. Also, the part above Y is charged with tank pressure, and the part below Y is charged with canister pressure.
If the atmospheric air pressure port is A, tank pressure port is B, and canister pressure port is C, the air flows according to pressure difference from each port as shown in the table below.
Scheme 168
| Condition of pressure | Flow |
|---|---|
| A < B (solenoid OFF) | B --> C |
| B < C (solenoid OFF) | C --> B |
| Solenoid ON | B <-- --> C |
SOLENOID FUNCTION CHART
Scheme 169
Scheme 170
Scheme 171
COMPONENT DESCRIPTION
Vehicle speed signals are taken in to the VDC control module and hydraulic control unit, and normal/erroneous data of the ABS wheel speed sensor is received by CAN communication from the VDC control module and hydraulic control unit.
The barometric pressure sensor is built into the ECM.
The barometric pressure sensor is built into the ECM.
The barometric pressure sensor is built into the ECM.
ECM, TCM, VDC CM and body integrated unit are connected by high speed CAN.
(Common Specifications)
CAN Protocol 2.0 B (Active)
Frame Format: 11 Bit ID Frame (Standard Frame)
(High speed CAN)
Conforms to IS011898
Communication Speed: 500 kbps