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Trouble Diagnoses
NAEL0375
SYMPTOM CHART
NAEL0375S01
PROCEDURE Diagnostic procedure
REFERENCE PAGE (EL- ) 258 259 260 261 262 262 264
SYMPTOM
FAIL-SAFE SYSTEM CHECK
POWER SUPPLY AND GROUND CIRCUIT CHECK
ASCD BRAKE/STOP LAMP SWITCH CHECK
ASCD STEERING SWITCH CHECK
VEHICLE SPEED SENSOR CHECK
ASCD PUMP CIRCUIT CHECK
ASCD ACTUATOR/PUMP CHECK
ASCD cannot be set. (“CRUISE” indica-
tor lamp does not ON.)
XX★3
ASCD cannot be set. (“SET” indicator
lamp does not blink.)
XXX
ASCD cannot be set. (“SET” indicator
lamp blinks.★1)
X XXXX
Vehicle speed does not decrease after
SET/COAST switch has been pressed.
XX
Vehicle speed does not return to the set
speed after RESUME/ACCEL switch has
been pressed.★2
XX
Vehicle speed does not increase after
RESUME/ACCEL switch has been
pressed.
XX
System is not released after CANCEL
switch (steering) has been pressed.
XX
Large difference between set speed and
actual vehicle speed.
XXX
Deceleration is greatest immediately
after ASCD has been set.
XXX
★1: It indicates that system is in fail-safe. After completing diagnostic procedures, perform “FAIL-SAFE SYSTEM CHECK” (EL-258) to
verify repairs.
★2: If vehicle speed is greater than 40 km/h (25 MPH) after system has been released, pressing RESUME/ACCELswitch returns vehicle
speed to the set speed previously achieved. However, doing so when the ASCD main switch is turned to “OFF”, vehicle speed will not
return to the set speed since the memory is canceled.
★3: Check only main switch built-in steering switch.
GI
MA
EM
LC
EC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Trouble Diagnoses
EL-257
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