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ACS

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K ELECTRICAL

B
SECTION
AUTO CRUISE CONTROL SYSTEM C

E
CONTENTS
PRECAUTIONS ......................................................... 2 . SYMPTOM CHART ............................................ 12 . F
Precautions for Supplemental Restraint System FAIL-SAFE SYSTEM CHECK ............................ 13 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- POWER SUPPLY AND GROUND CIRCUIT
SIONER" ................................................................. 2
. CHECK ............................................................... 14
. G
Wiring Diagrams and Trouble Diagnosis ................. 2 . ASCD BRAKE/STOP LAMP SWITCH CHECK ... 15
AUTOMATIC SPEED CONTROL DEVICE (ASCD) 3 ..... ASCD STEERING SWITCH CHECK ................. 17 .
Component Parts and Harness Connector Location 3 ..... VEHICLE SPEED SENSOR CHECK ................. 18 .
H
System Description ................................................. 5 . ASCD MOTOR ACTUATOR CIRCUIT CHECK... 18
POWER SUPPLY AND GROUND CIRCUIT ....... 5 . ASCD MOTOR ACTUATOR CHECK ................. 20 .
OPERATION ........................................................ 5 . Electrical Component Inspection ........................... 21 .
ASCD MOTOR ACTUATOR OPERATION .......... 6 . ASCD STEERING SWITCH ............................... 21 . I
Circuit Diagram ....................................................... 7
. ASCD BRAKE SWITCH AND STOP LAMP
Wiring Diagram -- ASCD -- ................................... 8 . SWITCH ............................................................. 21
.
FIG. 1 .................................................................... 8
. ASCD CLUTCH SWITCH (M/T) ......................... 21 . J
FIG. 2 .................................................................... 9
. PARK/NEUTRAL POSITION SWITCH (A/T) ...... 21 .
FIG. 3 .................................................................. 10
. ASCD RELAY (A/T MODELS) ............................ 22 .
Fail-safe System ....................................................11 . ASCD Wire Adjustment ......................................... 23 . ACS
DESCRIPTION ....................................................11 . WITH KA24DE ................................................... 23.
MALFUNCTION DETECTION CONDITIONS .....11 . WITH VG33E ...................................................... 23
.
Trouble Diagnoses ................................................ 12 . WITH VG33ER ................................................... 24.
L

ACS-1
PRECAUTIONS

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS003LE

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Wiring Diagrams and Trouble Diagnosis EKS0036C

When you read wiring diagrams, refer to the following:
q GI-13, "How to Read Wiring Diagrams", and
q PG-8, "POWER SUPPLY ROUTING" for power distribution circuit.
When you perform trouble diagnosis, refer to the following:
q GI-9, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES".
q GI-25, "How to Perform Efficient Diagnosis for an Electrical Incident".
Check for any Service bulletins before servicing the vehicle.

ACS-2
AUTOMATIC SPEED CONTROL DEVICE (ASCD)

AUTOMATIC SPEED CONTROL DEVICE (ASCD) PFP:18930
A
Component Parts and Harness Connector Location EKS0036D

ACS

WEL917A

ACS-3
AUTOMATIC SPEED CONTROL DEVICE (ASCD)

WKIA0293E

ACS-4
AUTOMATIC SPEED CONTROL DEVICE (ASCD)

System Description EKS0036E

A
Refer to Owner's Manual for ASCD operating instructions.
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times B
q through 15A fuse [No. 22, located in the fuse block (J/B)]
q to the stop lamp switch terminal 1.
When ignition switch is in the ON or START position, power is supplied C
q through 10A fuse [No. 5, located in the fuse block (J/B)]
q to ASCD control unit terminal 5,
D
q through 10A fuse [No. 12, located in the fuse block (J/B)]
q to park/neutral position switch terminal 1,
q through 10A fuse [No. 11, located in the fuse block (J/B)] E
q to combination meter terminals 32 and 38.
When park/neutral position switch (A/T) is in the P or N position, ground is supplied
q to park/neutral position switch terminal 2 F
q through ASCD relay terminal 1 to ASCD relay terminal 2
q through body grounds M68 and M14.
When ASCD ON

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