Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Vehicle speed sensor ”a” / Circuit description
Toyota Corolla (E120): Circuit description
The vehicle equipped with abs detects a vehicle speed using the stability control ecu and wheel speed sensor. This sensor monitors a wheel rotation speed and sends the signal to the ecu.
The stability control ecu converts these wheel speed signals into a 4–pulse signal and outputs it to the ecm via the combination meter.
The ecm determines the vehicle speed based on the frequency of these pulse signals.
In the vehicle without abs, the no. 1 Vehicle speed sensor outputs a 4–pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the ecm. The ecm determines the vehicle speed based on the frequency of these pulse signal.
W/ abs:
W/o abs:
Monitor description
Equipped with abs:
the ecm assumes that the vehicle is driven when the rpm of the transmission counter gear indicates more than 300 rpm and it has been over 30 seconds since the park/neutral position switch was turned off. If there is no signal from the vehicle speed sensor with these conditions satisfied, the ecm concludes that there is a fault in the vehicle speed sensor. The ecm will turn on the mil and a dtc is set.
Not equipped with abs:
the ecm assumes that the vehicle is driven when the park/neutral position switch is off and it has been over 4 seconds since the actual vehicle speed was 9 km/h or more.
If there is no signal from the vehicle speed sensor with these conditions satisfied, the ecm concludes that there is a fault in the vehicle speed sensor. The ecm will turn on the mil and a dtc is set.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Wiring diagram
Other materials:
Operating the touch screen
By touching the screen with your finger, you can control the multimedia system,
etc.
■ Drag*
Touch the screen with your finger, and move the screen to the desired position.
● Scrolling the lists
● Using scroll bar in lists
■ Flick*
Touch the screen with your finger an ...
Using the AUX port
To use the AUX port, connect a portable player, press the “AUDIO” button,
then select “AUX” to display the audio control screen.
Connecting a portable audio player
■Operating portable audio players connected to the multimedia system
The volume can be adjusted using the vehicle' ...
Listening to an iPod
Connecting an iPod enables you to enjoy music from the vehicle speakers.
Select “iPod” on the audio source selection screen.
When the iPod connected to the system includes iPod video, the system can only
output the sound by selecting the browse screen.
Connecting an iPod
Audio control scre ...