Nissan Frontier D22. Manual — part 4
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
ACS-9
C
D
E
F
G
H
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L
M
A
B
ACS
FIG. 2
WKWA0291E
ACS-10
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
FIG. 3
WKWA0629E
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
ACS-11
C
D
E
F
G
H
I
J
L
M
A
B
ACS
Fail-safe System
EKS006XJ
DESCRIPTION
When the fail-safe system senses a malfunction, it deactivates
ASCD operation. The SET indicator in the combination meter will
then flash.
MALFUNCTION DETECTION CONDITIONS
SEL255W
Detection conditions
ASCD operation during malfunc-
tion detection
●
ASCD steering (RES/ACCEL, CANCEL, COAST/SET) switch is stuck.
●
ASCD motor actuator ground circuit or power circuit is open or shorted.
●
ASCD motor actuator has internal malfunction.
●
Vehicle speed sensor is faulty.
●
ASCD control unit internal circuit is malfunctioning.
●
ASCD is deactivated.
●
Vehicle speed memory is can-
celed.
●
ASCD brake switch or stop lamp switch is faulty.
●
ASCD is deactivated.
●
Vehicle speed memory is not
canceled.
ACS-12
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Trouble Diagnoses
EKS006XK
SYMPTOM CHART
X: Applicable
*1: It indicates that system is in fail-safe. After completing diagnostic procedures, perform “FAIL-SAFE SYSTEM CHECK”, (
verify repairs.
*2: If vehicle speed is greater than 40 km/h (25 MPH) after system has been released, pressing RES/ACCEL switch returns vehicle
speed to the set speed previously achieved. However, doing so when the ON·OFF main switch is turned to “OFF”, vehicle speed will not
return to the set speed since the memory is canceled.
*3: Check only ON·OFF switch built-in steering switch.
PROCEDURE
Diagnostic procedure
REFERENCE PAGE
SYMPTOM
F
A
IL-
SAFE SYSTEM
CHECK
POW
E
R
SUPPL
Y AND GRO
UND CIR
CUIT CHECK
ASCD BRAKE/
S
T
OP LAM
P
SW
IT
CH CHECK
ASCD STEERIN
G SW
IT
CH CHECK
VEHICLE SPEED
SE
NSOR
CHECK
ASCD M
O
T
O
R ACTUA
T
OR CIR
CUIT CHECK
ASCD M
O
T
O
R ACTUA
T
OR CHECK
ASCD cannot be set. (“CRUISE” indicator
lamp does not turn ON.)
X
X*3
ASCD cannot be set. (“SET” indicator lamp
does not turn ON.)
X
X
X
ASCD cannot be set. (“SET” indicator lamp
blinks. *1)
X
X
X
X
X
Vehicle speed does not decrease after
COAST/SET switch has been pressed.
X
X
Vehicle speed does not return to the set
speed after RES/ACCEL switch has been
pressed. *2
X
X
Vehicle speed does not increase after RES/
ACCEL switch has been pressed.
X
X
System is not released after CANCEL switch
(steering) has been pressed.
X
X
Large difference between set speed and
actual vehicle speed.
X
X
X
Deceleration is greatest immediately after
ASCD has been set.
X
X
X
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