AUTO-CRUISE CONTROL
SYSTEM Troubleshootina
10. CHECKING THE CIRCUITS RELATED TO THE OVERDRIVE-CANCELLATION FUNCTION <A/T>
switch
Overdrive
Auto-cruise
control unit
Cruise-control
4
control
module
Description of operation
This is a function that cancels the overdrive function for a
certain fixed period of time, if during constant-speed travel in
overdrive, the actual vehicle speed decreases to less than the
speed retained in the memory. and then after a short
time causes the vehicle speed to return to the vehicle speed
retained in the memory.
Overdrive is
under the following conditions.
If, during constant-speed travel, the actual vehicle speed
decreases to 7 km/h (4.4 mph) or more below the set vehicle
speed.
Under either of the conditions described above, the
ON signals output from the microcomputer (with the control
unit) are no longer output, and transistor
is switched OFF.
As a result, transistor
is also switched OFF, causing the
current passing through the overdrive switch of the selector
handle to be interrupted at transistor
with the result that the
drive is controlled at
gear.
Troubleshooting hint
ECU terminal voltage
Terminal
Signal
I
Conditions
Terminal
No.
I
10
4 A/T control
When the overdrive
module
switch is switched
positive
ON.
voltage
11
When the overdrive
Battery
switch is switched
positive
ON.
voltage
TSB Revision
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