Toyota ZZT230 series Repair Manual page 715

D�
21
DTC
CIRCUIT DESCRIPTION
The signal from the vehicle speed sensor circuit is sent to cruise control
of
The rotor shaft is driven by the gear of the transmission.
the shaft, the vehicle speed sensor sends a 4-pulse signal through the combination
For each rotation
meter to the cruise oontroi
ECU
This signal is converted Inside the combination meter and sent as a 4-pu l s e signal to the cruise control ECU.
The calculates the vehicle speed from this pulse frequency.
DTCNo.
Speed signal
Is
21
control is set.
Open in Vehicle Speed Sensor Circuit
ECU (See the following installation).
4 pu1ses1
shaft
1 rotation
rotor
of
....
ECU
Combination Me te
Detection
Item
not Input to the cruise control ECU while cruise
-
ECU as vehicle speed signal.
4 pulses/
of
1
rotation
rotor shaft
....
r Cruise Control ECU
• Combination meter
Harness or connector between cruise control ECU aod com-
•
blnation meter, combination meter and vehicle speed sensor
• Vehicle speed sensor
•
Cruise control ECU
_,
Trouble Area