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AUTO CRUISE CONTROL SYSTEM

K ELECTRICAL

AUTO CRUISE CONTROL SYSTEM
SECTION ACS B

E
CONTENTS
ASCD PARK/NEUTRAL POSITION RELAY ................. 29 . F
ASCD Wire Adjustment ......................................... 29 .
PRECAUTIONS ......................................................... 3 . SERVICE DATA AND SPECIFICATIONS (SDS) ..... 30 .
Precautions for Supplemental Restraint System Standard and Limit ................................................. 30
. G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Tightening torque ................................................... 30
.
SIONER" ................................................................. 3
.
AUTOMATIC SPEED CONTROL DEVICE (ASCD) 4 .....
Component Parts and Harness Connector Location 4 .....
ICC H
System Description ................................................. 4 . PRECAUTIONS ....................................................... 31 .
POWER SUPPLY AND GROUND ....................... 4 . Supplemental Restraint System (SRS) "AIR BAG"
OPERATION ........................................................ 5 . and "SEAT BELT PRE-TENSIONER" .................... 31 . I
ASCD PUMP OPERATION .................................. 6 . Precautions for ICC System Service ..................... 31 .
Schematic ............................................................... 7
. Wiring Diagrams and Trouble Diagnosis ............... 31 .
Wiring Diagram -- ASCD -- ................................... 8 . PREPARATION ........................................................ 32 . J
FIG. 1 .................................................................... 8
. Special Service Tool .............................................. 32 .
FIG. 2 .................................................................... 9
. DESCRIPTION ......................................................... 33 .
FIG. 3 .................................................................. 10
. Outline ................................................................... 33
.
FIG. 4 ...................................................................11
. ACS
System Diagram .................................................... 33 .
FIG. 5 .................................................................. 12
. Components Description ....................................... 33 .
FIG. 6 .................................................................. 13
. CAN Communication ............................................. 34 .
Fail-Safe System ................................................... 13 . SYSTEM DIAGRAM ........................................... 34 . L
DESCRIPTION ................................................... 13 . INPUT/OUT SIGNAL CHART ............................. 34 .
MALFUNCTION DETECTION CONDITIONS .... 14 . Switch Operation ................................................... 35 .
CONSULT-II Inspection Procedure ....................... 14 . ICC System Display ............................................... 35 . M
CONSULT-II Self-diagnostic Results ..................... 15 . ACTION TEST .......................................................... 37.
CONSULT-II Data Monitor ..................................... 15 . ICC system running test ........................................ 37 .
Trouble Diagnoses ................................................ 16 . ICC SYSTEM SET CHECKING ......................... 37 .
SYMPTOM CHART ............................................ 16 . CHECK FOR INCREASE OF THE CRUISING
FAIL-SAFE SYSTEM CHECK ............................ 18 . SPEED ............................................................... 37
.
POWER SUPPLY AND GROUND CIRCUIT CHECK FOR DECREASE OF THE CRUISING
CHECK ............................................................... 19
. SPEED ............................................................... 37
.
ASCD BRAKE/STOP LAMP SWITCH CHECK ... 20 CHECK FOR THE CANCELLATION OF ICC
ASCD STEERING SWITCH CHECK ................. 22 . SYSTEM (NORMAL DRIVING CONDITION) IN
VEHICLE SPEED SENSOR CHECK ................. 23 . THE FOLLOWING CASES: ............................... 37 .
ASCD PUMP CIRCUIT CHECK ......................... 24 . CHECK FOR RESTORING THE SPEED THAT
ASCD ACTUATOR/PUMP CHECK .................... 26 . IS SET BY ICC SYSTEM BEFORE ICC CAN-
ECM SIGNAL CHECK ....................................... 27 . CELLATION ........................................................ 37 .
TCS MONITOR CHECK .................................... 28 . CHECK FOR ON/OFF SWITCH ......................... 37 .
Electrical Component Inspection ........................... 28 . CHECK FOR ACCEL/RES, COAST/SET, CAN-
ASCD BRAKE SWITCH AND STOP LAMP
SWITCH ............................................................. 28
.

Revision: 2004 April ACS-1 2002 Q45
CEL SWITCHES ................................................. 38 . DTC 62 BOOSTER SOL/V CIRCUIT .....................76 .
CHECK FOR DISTANCE SWITCH .................... 38 . DTC 63 RELEASE SW CIRCUIT ...........................77 .
LASER BEAM AIMING ADJUSTMENT .................. 39 . DTC 65 PRESSURE CONTROL ...........................78 .
Outline ................................................................... 39
. DTC 74 LASER BEAM OFF CNTR .......................79 .
Preparation ............................................................ 39. DTC 81 POWER SUPPLY VALVE .........................79 .
Outline of Adjustment Procedure ........................... 39 . DTC 83 POWER SUPPLY VALVE .........................80 .
Setting the ICC Target Board ................................. 39 . DTC 85 AIR VALVE [LOW VOLTAGE] ...................81 .
ADJUSTING HEIGHT OF THE TARGET ........... 39 . DTC 87 RELEASE VALVE [LOW VOLTAGE] ........81 .
ADJUSTING THE RIGHT-LEFT POSITION OF DTC 90 STOP LAMP RLY FIX ...............................82 .
THE TARGET ..................................................... 40 . DTC 92 ECM CIRCUIT ..........................................87 .
SETTING THE TARGET .................................... 40 . DTC 97 AT CIRCUIT ..............................................87 .
Aiming Adjustment ................................................. 41 . DTC 98 GEAR POSITION .....................................87 .
CHECK AFTER THE ADJUSTMENT ................. 44 . DTC 102 RADAR STAIN ........................................88 .
ELECTRICAL UNITS LOCATION ............................ 45 . DTC 103 LASER SENSOR FAIL ...........................89 .
Component Parts and Harness Connector Location 45 ... DTC 104 LASER AIMING INCMP .........................89 .
WIRING DIAGRAM .................................................. 46 . DTC 107 LASER COMM FAIL ...............................89 .
Schematic .............................................................. 46. DTC 109 LASER HIGH TEMP ...............................90 .
Wiring Diagram -- ICC -- ..................................... 47 . TROUBLE DIAGNOSIS FOR SYMPTOMS .............91 .
TERMINALS AND REFERENCE VALUE ................ 54 . Symptom Chart ......................................................91 .
Terminals and Reference Value for ICC Unit ......... 54 . Symptom 1: Cruise ON/OFF Does Not Switch
Terminals and Reference Value for ICC Radar Sen- ON.(The ICC System Display in the Combination
sor .......................................................................... 56
. Meter Does Not Illuminate) Cruise ON/OFF Does
Terminals and Reference Value for ICC Warning Not Switch OFF (The ICC System Display in the
Chime .................................................................... 56
. Combination Meter Remains Powered) .................92 .
TROUBLE DIAGNOSIS -- GENERAL DESCRIP- Symptom 2: The ICC System Cannot Be Set (ON/
TION ......................................................................... 57
. OFF Switch Turns on/Off) ......................................94 .
Work Flow .............................................................. 57. Symptom 3: The ICC System Cannot Be Cancelled
CONSULT-II Function ............................................ 58 . by the CANCEL Switch, RESUME or Increase the
DESCRIPTION ................................................... 58 . Set Vehicle Speed, or Change the Distance Setting...95
WORK SUPPORT .............................................. 58 . Symptom 4: The ICC System Is Not Cancelled
SELF-DIAGNOSTIC RESULTS .......................... 59 . When the Gear Is in Other Than `D' ......................96 .
DATA MONITOR ................................................. 59 . Symptom 5: Chime Does Not Sound .....................96 .
ACTIVE TEST .................................................... 61 . Symptom 6: Chime Does Not Stop ........................98 .
Self-Diagnostic Function ........................................ 62 . Symptom 7: Driving Force Is Hunting ....................98 .
WITH CONSULT-II ............................................. 62 . Symptom 8: The ICC System Frequently Cannot
WITHOUT CONSULT-II ...................................... 63 . Detect the Vehicle Ahead/The Detection Zone Is
SELF-DIAGNOSIS BY CONSULT-II WILL NOT Short ......................................................................98
.
RUN .................................................................... 64
. Symptom 9: The System Does Not Detect the Vehi-
SELF-DIAGNOSIS BY ICC SYSTEM DISPLAY cle Ahead at All ......................................................99.
WILL NOT RUN .................................................. 65 . ELECTRICAL COMPONENT INSPECTION .......... 100 .
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ICC Steering Switch ............................................. 100 .
ITEMS ....................................................................... 68
. ICC Brake Switch and Stop Lamp Switch ............ 100 .
Diagnostic Trouble Code (DTC) Chart ................... 68 . Booster Solenoid .................................................. 100 .
DTC 11 CONTROL UNIT ....................................... 69 . Release Switch .................................................... 101 .
DTC 20 CAN COMM CIRCUIT .............................. 70 . ASCD Actuator ..................................................... 101 .
DTC 31 POWER SUPPLY CIR 1, DTC 34 POWER Vacuum Hose ....................................................... 101 .
SUPPLY CIR 2 ....................................................... 70 . ASCD Pump ......................................................... 101 .
DTC 41 VHCL SPEED SE CIRC ........................... 71 . REMOVAL AND INSTALLATION ........................... 102 .
DTC 42 THRTL POS SEN CIRC ........................... 71 . ICC Unit ............................................................... 102
.
DTC 43 ABS/TCS/VDC CIRC ............................... 72 . ICC Sensor .......................................................... 102.
DTC 45 BRAKE SW/STOP L SW .......................... 73 . ICC Warning Chime ............................................. 103 .
DTC 46 OPERATION SW CIRC ............................ 74 . ICC Steering Switch ............................................. 103 .
DTC 61 PRESS SEN CIRCUIT ............................. 75 . ASCD Wire Adjustment ........................................ 104 .

Revision: 2004 April ACS-2 2002 Q45
PRECAUTIONS
[ASCD]
PRECAUTIONS
[ASCD] PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS003O6

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual. C
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. D
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. E
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. F

ACS

Revision: 2004 April ACS-3 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
AUTOMATIC SPEED CONTROL DEVICE (ASCD) PFP:18930

Component Parts and Harness Connector Location EKS003O7

PBIC0200E

System Description EKS003O8

Refer to Owner's Manual for ASCD operating instructions.
POWER SUPPLY AND GROUND
q through 10A fuse [No. 20, located in the fuse block (J/B)]
q to ASCD brake switch terminal 1 and
q to park/neutral position relay terminal 3,
q to ASCD control unit terminal 5
q through 15A fuse [No. 17, located in the fuse block (J/B)]
q to stop lamp switch terminal 1

Revision: 2004 April ACS-4 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
q through 10A fuse [No. 9, located in the fuse block (J/B)]
q to combination meter terminal 59. A
Power is supplied at all times:
q through 15A fuse [No. 17, located in the fuse block (J/B)]
B
q to the stop lamp switch terminal 1, and
q to ASCD control unit terminal 23.
When park/neutral position is in the P or N position, ground is supplied: C
q to park/neutral position relay terminal 2
q through park/neutral position switch and body grounds E24 and E44.
When ASCD main switch is depressed (ON), ground is supplied: D
q to ASCD control unit terminal 11
q from ASCD steering switch terminal 1
q to ASCD steering switch terminal 2 E
q from ASCD control unit terminal 24.
then ASCD control unit holds CRUISE condition and illuminates CRUISE indicator.
Ground is supplied: F
q to combination meter terminal 63
q from ASCD control unit terminal 15.
G
OPERATION
Set Operation
To activate the ASCD, all of following conditions must exist. H
q Ground supply to ASCD control unit terminal 11
q Power supply to ASCD control unit terminal 8 [Brake pedal is released and A/T selector lever is in a posi-
tion other than P or N.] I
q Vehicle speed is between 40 km/h (25 MPH) and 144 km/h (89 MPH). (Signal from combination meter)
When the SET/COAST switch is depressed, power is supplied:
J
q from ASCD steering switch terminal 2
q to ASCD control unit terminal 24.
And then ASCD pump is activated to control throttle wire and ASCD control unit supply ground
ACS
q to combination meter terminals 64 to illuminate SET indicator.
A/T Overdrive Control during Cruise Control Driving
When the vehicle speed is approximately 3 km/h (2 MPH) below set speed, a signal is sent L
q from ASCD control unit terminal 10
q to TCM (transmission control module) through combination meter.
M
When this occurs, the TCM (transmission control module) cancels overdrive.
After vehicle speed is approximately 1 km/h (0.6 MPH) above set speed, overdrive is reactivated.
ASCD Shifting Control
During ASCD cruise, ASCD control unit controls A/T shifting to avoid uncomfortable shifting.
This is used to control the signals below.
q Throttle position sensor from ECM
q A/T shift solenoid valve A
Coast Operation
When the SET/COAST switch is depressed during cruise control driving, ASCD actuator returns the throttle
cable to decrease vehicle set speed until the switch is released. And then ASCD will keep the new set speed.
Accel Operation
When the RESUME/ACCEL switch is depressed, power is supplied
q from ASCD steering switch terminal 2
q to ASCD control unit terminal 24.

Revision: 2004 April ACS-5 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
If the RESUME/ACCEL switch is depressed during cruise control driving, ASCD actuator pulls the throttle
cable to increase the vehicle speed until the switch is released or vehicle speed reaches the maximum speed
controlled by the system. ASCD will then keep the new set speed.
Cancel Operation
When any of following conditions exist, cruise operation will be canceled.
q CANCEL switch is depressed. (Power supply to ASCD control unit terminal 24)
q Brake pedal is depressed. (Power supply to ASCD control unit terminal 23 from stop lamp switch)
q Brake pedal is depressed or A/T selector lever is shifted to P or N position. (Power supply to ASCD con-
trol unit terminal 8 is interrupted.)
If MAIN switch is turned to OFF during ASCD activation, all ASCD operations will be canceled and vehicle
speed memory will be erased.
Resume Operation
When the RESUME/ACCEL switch is depressed after cancel operation other than when depressing MAIN
switch is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition
must meet following conditions.
q Brake pedal is released.
q A/T selector lever is in other than P and N position.
q Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH).
ASCD PUMP OPERATION
The ASCD pump consists of a vacuum motor, an air valve and a release valve. When the ASCD activates,
power is supplied
q from terminal 12 of ASCD control unit
q to ASCD pump terminal 1.
Ground is supplied to vacuum motor, air valve and release valve from ASCD control unit depending on the
operated condition as shown in the below table.
The pump is connected to ASCD actuator by vacuum hose. When the ASCD pump is activated, the ASCD
pump vacuum affects the diaphragm of ASCD actuator to control throttle cable.
Actuator inner
Air valve (*1) Release valve (*1) Vacuum motor
pressure
ASCD not operating Open Open Stopped Atmosphere
Releasing throttle cable Open Closed Stopped Vacuum
ASCD operating Holding throttle position Closed Closed Stopped Vacuum (*2)
Pulling throttle cable Closed Closed Operated Vacuum
*1: When power and ground is supplied, valve is closed.
*2: Set position held.

Revision: 2004 April ACS-6 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
Schematic EKS003O9

ACS

TBWM0059E

Revision: 2004 April ACS-7 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
Wiring Diagram -- ASCD -- EKS003OA

FIG. 1

TBWM0060E

Revision: 2004 April ACS-8 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
FIG. 2
A

ACS

TBWM0061E

Revision: 2004 April ACS-9 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
FIG. 3

TBWM0062E

Revision: 2004 April ACS-10 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
FIG. 4
A

ACS

TBWM0063E

Revision: 2004 April ACS-11 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
FIG. 5

TBWM0064E

Revision: 2004 April ACS-12 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
FIG. 6
A

ACS

TBWM0065E

Fail-Safe System EKS003OB

DESCRIPTION
When the fail-safe system senses a malfunction, it deactivates
ASCD operation. The SET indicator in the combination meter will
then flash.

PBIC0201E

Revision: 2004 April ACS-13 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
MALFUNCTION DETECTION CONDITIONS
Detection conditions ASCD operation during malfunction detection
q ASCD steering (RESUME/ACCEL, CANCEL, SET/COAST) switch is stuck. q ASCD is deactivated.
q Vacuum motor ground circuit or power circuit is open or shorted. q Vehicle speed memory is canceled.
q Air valve ground circuit or power circuit is open or shorted.
q Release valve ground circuit or power circuit is open or shorted.
q Vehicle speed sensor is faulty.
q ASCD control unit internal circuit is malfunctioning.
q ASCD brake switch or stop lamp switch is faulty. q ASCD is deactivated.
q Vehicle speed memory is not canceled.

CONSULT-II Inspection Procedure EKS003OC

1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.

PBIC0202E

3. Turn ignition switch ON.
4. Turn ASCD main switch ON.
5. Touch "START (NISSAN BASED VHCL)" (on CONSULT-II dis-
play).
6. Touch ASCD.
7. Touch SELF-DIAG RESULTS.

PEL041P

q Self-diagnostic results are shown on display.
Refer to ACS-15, "CONSULT-II Self-diagnostic Results"
table.

PFA021B

Revision: 2004 April ACS-14 2002 Q45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
8. Touch DATA MONITOR.
A

PEL043P

D
q Touch START.
q Data monitor results are shown on display.
Refer to ACS-15, "CONSULT-II Data Monitor" table. E
For further information, read the CONSULT-II Operation
Manual.
F

G
PEL811S

CONSULT-II Self-diagnostic Results EKS003OD
H
Diagnostic item Description Repair/Check order
NO DTC IS DETECTED.
q Even if no malfunction is indicated, further testing may be I
FURTHER TESTING --
required as far as the customer complains.
MAY BE REQUIRED.
q The power supply circuit for the ASCD pump is open. (An abnor- ASCD PUMP CIRCUIT CHECK
POWER SUPPLY-VALVE
mally high voltage is entered.) ACS-24 J
q The vacuum motor circuit is open or shorted. (An abnormally ASCD PUMP CIRCUIT CHECK
VACUUM PUMP
high or low voltage is entered.) ACS-24
q The air valve circuit is open or shorted. (An abnormally high or ASCD PUMP CIRCUIT CHECK ACS
AIR VALVE
low voltage is entered.) ACS-24
q The release valve circuit is open or shorted. (An abnormally high ASCD PUMP CIRCUIT CHECK
RELEASE VALVE
or low voltage is entered.) ACS-24 L
VEHICLE SPEED SENSOR
VHCL SP

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