Infiniti F50. Manual - part 6
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
ACS-17
[ASCD]
C
D
E
F
G
H
I
J
L
M
A
B
ACS
Trouble Diagnoses
EKS003OF
SYMPTOM CHART
*1: It indicates that system is in fail-safe. After completing diagnostic procedures, perform “FAIL-SAFE SYSTEM CHECK” (
) to
verify repairs.
*2: If vehicle speed is greater than 40 km/h (25 MPH) after system has been released, pressing RESUME/ACCEL switch returns vehicle
speed to the set speed previously achieved. However, doing so when the MAIN (CRUISE) switch is turned to “OFF”, vehicle speed will
not return to the set speed since the memory is canceled.
*3: Check only MAIN (CRUISE) switch built-in steering switch.
PROCEDURE
Diagnostic procedure
REFERENCE PAGE (ACS-
)
SYMPTOM
F
A
IL-
SAFE SYSTEM
CH
E
C
K
POW
E
R
SUPP
L
Y
AND GROUND
CIRCUI
T CHECK
ASCD BRAKE/ST
O
P
LAM
P
SW
IT
CH CHECK
ASCD
STEERING SW
IT
CH CHECK
VEHICLE SPEED SENSOR
CHECK
ASCD PUMP
CIRCUI
T CHECK
ASCD ACTUA
T
O
R
/PUMP CH
E
C
K
ECM
SI
GNAL CHECK
TCS MONI
T
O
R
CHECK
ASCD cannot be set. (“CRUISE” indicator
lamp does not ON.)
X
X*3
ASCD cannot be set. (“SET” indicator lamp
does not blink.)
X
X
X
X
ASCD cannot be set. (“SET” indicator lamp
blinks.*1)
X
X
X
X
X
Vehicle speed does not decrease after SET/
COAST switch has been pressed.
X
X
Vehicle speed does not return to the set
speed after RESUME/ACCEL switch has
been pressed.*2
X
X
Vehicle speed does not increase after
RESUME/ACCEL switch has been pressed.
X
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
X
Deceleration is greatest immediately after
ASCD has been set.
X
X
X
X