2001 INFINITI QX4 Factory Service Manual

Page 1409 of 2395

INFINITI QX4 2001  Factory Service Manual SchematicNBEL0096
MEL837L
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Schematic
EL-224

Page 1410 of 2395

INFINITI QX4 2001  Factory Service Manual Wiring Diagram Ð ASCD ÐNBEL0097FIG. 1NBEL0097S01
MEL838L
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Wiring Diagram Ð ASCD Ð
EL-225

Page 1411 of 2395

INFINITI QX4 2001  Factory Service Manual FIG. 2NBEL0097S02
MEL839L
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Wiring Diagram Ð ASCD Ð (Contd)
EL-226

Page 1412 of 2395

INFINITI QX4 2001  Factory Service Manual FIG. 3NBEL0097S03
MEL840L
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Wiring Diagram Ð ASCD Ð (Contd)
EL-227

Page 1413 of 2395

INFINITI QX4 2001  Factory Service Manual FIG. 4NBEL0097S04
MEL841L
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Wiring Diagram Ð ASCD Ð (Contd)
EL-228

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INFINITI QX4 2001  Factory Service Manual SEL255W
Fail-safe SystemNBEL0217DESCRIPTIONNBEL0217S01When the fail-safe system senses a malfunction, it deactivates
ASCD operation. The SET indicator in the combination meter will
then flash.
MALFUNC

Page 1415 of 2395

INFINITI QX4 2001  Factory Service Manual Trouble DiagnosesNBEL0218SYMPTOM CHARTNBEL0218S01
PROCEDURE Diagnostic procedure
REFERENCE PAGE (EL- ) 231 232 233 234 235 235 237
SYMPTOM
FAIL-SAFE SYSTEM CHECK
POWER SUPPLY AND GROUND CIRCUIT CHECK

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INFINITI QX4 2001  Factory Service Manual SEL417V
FAIL-SAFE SYSTEM CHECK=NBEL0218S021. Turn ignition switch to ON position.
2. Turn ASCD main switch to ON and check if the SET indicator
blinks.
If the indicator lamp blinks, check the followin