Infiniti QX4. Electrical System (2003 year). Manual — part 18
ASCD ACTUATOR/PUMP CHECK
=NBEL0375S08
1
CHECK VACUUM HOSE
Check vacuum hose (between ASCD actuator and ASCD pump) for breakage, cracks or fracture.
MEL402G
OK or NG
OK
䊳
GO TO 2.
NG
䊳
Repair or replace hose.
2
CHECK ASCD WIRE
Check wire for improper installation, rust formation or breaks.
OK or NG
OK
䊳
GO TO 3.
NG
䊳
Repair or replace wire. Refer to “ASCD Wire Adjustment” (EL-280).
3
CHECK ASCD ACTUATOR
1. Disconnect vacuum hose from ASCD actuator.
2. Connect the hose of hand vacuum pump to ASCD actuator.
SEL264W
OK or NG
OK
䊳
GO TO 4.
NG
䊳
Replace ASCD actuator.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Trouble Diagnoses (Cont’d)
EL-277
4
CHECK ASCD PUMP
1. Disconnect vacuum hose from ASCD pump and ASCD pump connector.
2. If necessary remove ASCD pump.
3. Connect vacuum gauge to ASCD pump.
4. Apply 12V direct current to ASCD pump and check operation.
SEL265WB
OK or NG
OK
䊳
INSPECTION END
NG
䊳
Replace ASCD pump.
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Trouble Diagnoses (Cont’d)
EL-278
SEL803Y
Electrical Component Inspection
=NBEL0376
ASCD BRAKE SWITCH AND STOP LAMP SWITCH
NBEL0376S01
Condition
Continuity
ASCD brake
switch
Stop lamp switch
When brake pedal is depressed
No
Yes
When brake pedal is released
Yes
No
Check each switch after adjusting brake pedal — refer to BR-12,
“BRAKE PEDAL AND BRACKET”.
SEL303XA
PARK/NEUTRAL POSITION SWITCH
NBEL0376S02
A/T selector lever position
Continuity
Between terminals 1 and 2
“P”
Yes
“N”
Yes
Except “P” and “N”
No
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Electrical Component Inspection
EL-279
ASCD Wire Adjustment
=NBEL0377
MEL383K
CAUTION:
쐌
Be careful not to twist ASCD wire when removing it.
쐌
Do not tense ASCD wire excessively during adjustment.
Adjust the tension of ASCD wire in the following manner.
1.
Loosen lock nut and adjusting nut.
2.
Make sure that accelerator wire is properly adjusted. Refer to
FE-3, “ACCELERATOR CONTROL SYSTEM”.
3.
Tighten adjusting nut just until throttle drum starts to move.
4.
Loosen adjusting nut again 1/2 to 1 turn.
5.
Tighten lock nut.
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
ASCD Wire Adjustment
EL-280
Precautions
NBEL0458
PRECAUTIONS FOR ICC SYSTEM SERVICE
NBEL0458S02
쐌
Do not look straight into the laser beam discharger when
adjusting laser beam aiming.
쐌
Turn the ON/OFF switch OFF in conditions similar to driving,
suchlike Free rollers or a chassis dynamometer.
쐌
Do
not
use
the
ICC
sensor
removing
from
vehicle,
disassemble, or remodel the sensor.
쐌
Erase DTCs when replacing parts of ICC system, then check
the operation of ICC system after adjusting laser beam aiming
if necessary.
PRECAUTIONS FOR CAN SYSTEM SERVICE
NBEL0458S04
쐌
Do not apply voltage of 7.0V or higher to the measurement
terminals.
쐌
Use the tester with its open terminal voltage being 7.0V or less.
PKIA0306E
쐌
Solder the repaired parts, and wrap with tape. [Frays of twisted
line must be within 110 mm (4.33 in)]
Preparation
NBEL0459
SPECIAL SERVICE TOOL
NBEL0459S01
The actual shapes of Kent-Moore tools may differ from those of special service tools illusttated here.
Tool number
(Kent-Moore No.)
Tool name
Description
KV99110100
(J-45718)
ICC target board
PKIA0358J
Laser beam aiming adjustment
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Precautions
EL-281
Description
NBEL0460
OUTLINE
NBEL0460S01
The Intelligent Cruise Control (ICC) system automatically maintains
a selected distance from the vehicle ahead according to that vehi-
cle’s speed, or at the set speed, if the road ahead is clear.
With ICC, the same speed as other vehicles can be maintained
without the constant need to adjust the operating speed as with a
normal cruise control system.
The system is intended to enhance the operation of the vehicle
when following another vehicle in the same lane and direction.
If the distance sensor detects a slower moving vehicle ahead, the
system will reduce speed so that the vehicle ahead can be followed
at the selected distance.
The system automatically controls the throttle and applies the
brakes (up to 25% of vehicle braking power) if necessary.
The detection range of the sensor is approximately 390 ft (120 m)
ahead.
Refer to Owner’s Manual for Intelligent Cruise Control System
operating instructions.
SYSTEM DIAGRAM
NBEL0460S02
SEL501Y
COMPONENTS DESCRIPTION
NBEL0460S03
Component
Description
ICC unit
Operates ASCD actuator and brake booster based on that sensor signals and CAN commu-
nication data, then controls vehicle distance.
ICC sensor
Irradiate laser beam, and receives reflected laser beam to measure distance from preceding
vehicle.
ECM
Transmits throttle angle signal to ICC unit.
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Description
EL-282
Component
Description
Brake pressure sensor
Detects fluid pressure in master cylinder.
ASCD actuator
Based on command from ICC unit, adjust throttle valve angle with ASCD actuator, using
vacuum emerged from vacuum pump.
Brake booster
Adjusts brake fluid pressure, based on command from ICC unit.
ABS actuator and electrical unit
ABS operation signal to ICC unit.
SKIA1203E
SWITCH OPERATION
NBEL0460S05
The system is operated by a master ON/OFF switch and four con-
trol switches, all mounted on the steering wheel
No.
Switch name
Description
1
ON/OFF switch
Master switch to activate the system
2
COAST/SET switch
Sets desired cruise speed, reduces speed incrementally
3
ACCELERATE/RESUME switch
Resumes set speed or increases speed incrementally
4
CANCEL switch
Deactivates system without erasing set speed
5
DISTANCE switch
Changes the following distance from: Maximum, Intermediate, Minimum
SEL502Y
ICC SYSTEM DISPLAY
NBEL0460S06
No.
Component
Description
1
Intelligent cruise control system warning
lamp (Orange)
The light comes on if there is a malfunction in the ICC system.
2
Vehicle ahead detection indicator
Indicates whether it detects a vehicle ahead.
3
Set distance indicator
Display the selected distance between vehicles set with the DISTANCE
switch.
4
Own vehicle indicator
Indicates the base vehicle.
5
ON/OFF switch indicater lamp (White)
Indicates that the ON/OFF switch is ON.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Description (Cont’d)
EL-283
No.
Component
Description
6
Set vehicle speed indicator
Indicates the set vehicle speed.
Action Test
NBEL0461
ICC SYSTEM RUNNING TEST
NBEL0461S01
ICC System Set Checking
NBEL0461S0101
1.
Turn on the ON/OFF switch.
2.
Drive the vehicle at 40 km/h (25 MPH) to 144 km/h (90 MPH).
3.
Push the COAST/SET switch.
4.
Confirm that the desired speed is set as hand is released from
the COAST/SET switch.
NOTE:
쐌
When there is no vehicle ahead, drive at the set speed steadily.
쐌
When there is a vehicle ahead, control to maintain distance
from the vehicle ahead, watching its speed.
쐌
The set vehicle speed is displayed on the ICC system indica-
tor in the combination meters.
Check for Increase of The Cruising Speed
NBEL0461S0102
1.
Set the ICC at desired speed.
2.
Check if the set speed increases by 1.6 km (1 MPH) as
COAST/SET switch is pushed.
NOTE:
The maximum set speed of the ICC system is 144 km/h (90 MPH).
Check for Decrease of The Cruising Speed
NBEL0461S0103
1.
Set the ICC at desired speed.
2.
Check if the set speed decreases by 1.6 km/h (1 MPH) as
COAST/SET switch is pushed.
NOTE:
쐌
ICC system is automatically turned off when the driving speed
lowers to 32 km/h (20 MPH) due to the deceleration of the
vehicle ahead.
쐌
The lowest set speed is 40 km/h (25 MPH).
Check for The Cancellation of ICC System (Normal
Driving Condition) in The Following Cases:
NBEL0461S0104
1.
When the brake pedal is depressed after the system is turned
on.
2.
When the select lever is shifted into other than “D” including
manual shift.
3.
When the ON/OFF switch is turned off.
4.
When CANCEL switch is operated.
Check for Restoring The Speed That is Set by ICC
System Before ICC Cancellation
NBEL0461S0105
1.
Cancel the system by depressing the foot brake.Then, check
that the speed before cancellation is restored when pressing
ACCEL/RES switch with 40 km/h (25 MPH) or above.
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Description (Cont’d)
EL-284
2.
Cancel the system by shifting the select lever into other than
“D”, Then, check if the speed set before the cancellation is
restored when ACCEL/ RES switch is pressed.
3.
Check if the speed previously set is restored when ACCEL/
RES switch is operated with driving 40 km/h (25 MPH), after
canceling the ICC by operating the CANCEL switch.
SEL503Y
Check for ON/OFF Switch
NBEL0461S0106
1.
Start the engine.Then, check the following operations are car-
ried correctly.
2.
Intelligent Cruise Control (ICC) system is displayed in between
the
tachometer
and
speedometer
illuminates
when
ON/OFFswitch is ON and ready for operation.The illumination
goes off when ON/OFF switch is turned to OFF.
3.
“CRUISE” illumination and “ICC” system illumination go off
when the key switch is turned to OFF while ON/OFFswitch is
ON (“CRUISE” illumination is ON and ICC system is ready for
operation).
Check for ACCEL/RES, COAST/SET, CANCEL Switches
NBEL0461S0107
1.
Check if ACCEL/ RES, COAST/SET, CANCEL switches are
operated smoothly.
2.
Check if buttons come up as hand is released from the buttons.
Check for Distance Switch
NBEL0461S0108
1.
Start the engine.
2.
Turn on the ON/OFF switch.
3.
Press the DISTANCE switch.
4.
Check if the set distance indicator changes display in order of:
(long)
,
(medium)
,
(short).
NOTE:
The set distance indicator shows ’long’ immediately after the
engine starts.
SEL504Y
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Action Test (Cont’d)
EL-285
Laser Beam Aiming Adjustment
NBEL0462
OUTLINE
NBEL0462S01
Adjust the laser beam aiming every time the ICC sensor is removed
or installed.
CAUTION:
쐌
Place the vehicle on the level ground when the laser beam
aiming adjustment is operated.
쐌
Follow the CONSULT-II when adjusting the Laser beam
aiming (Laser beam aiming adjustment cannot be oper-
ated without CONSULT-II).
PREPARATION
NBEL0462S02
쐌
Keep all tires inflated to correct pressures. Adjust the tire pres-
sure to the specified pressure value.
쐌
See that there is no-load in vehicle other than the driver (or
equivalent weight placed in driver’s position). Coolant, engine
oil filled up to correct level and full fuel tank.
쐌
Shift the gear into “P” position and release the parking brake.
SEL505Y
쐌
Clean the sensor with a soft cloth.
OUTLINE OF ADJUSTMENT PROCEDURE
NBEL0462S03
1.
Set up the ICC target board [KV99110100 (J-45718)].
2.
Adjust the sensor following the procedure on CONSULT-II
(Turn manually the screw for up-down position adjustment.
ICC sensor automatically adjust the right-left position).
SETTING THE ICC TARGET BOARD
NBEL0462S04
Accurate ICC target board setting is required for the laser beam
aiming adjustment.
CAUTION:
ICC system does not function normally if laser beam aiming
is not accurate.
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Laser Beam Aiming Adjustment
EL-286
SEL506Y
Adjusting Height of The Target
NBEL0462S0401
1.
Attach a triangle scale as shown in the figure.
SEL507Y
2.
Adjust the height of the target stand so that the point of the tri-
angle aims the center of the ICC sensor.
SKIA1211E
Adjusting The Right-left Position of The Target
NBEL0462S0402
1.
Attach a scale [at least 300 mm (12 in) or longer] or stick as
shown in the figure.
SEL508Y
2.
Suspend a thread with weight on the tip of the thread to 254
mm (10 in) left side of the target board from the center of the
target board on top.
Setting The Target
NBEL0462S0403
1.
Suspend a thread with weight on tip to splice the center of the
front and back bumpers. Then, mark the center point on the
ground as each weight points.
2.
Link the front and back bumpers’ center points marked on the
ground, and mark a point 5 m ahead of the vehicle, on the
extended line of the previous link line of the bumper center
points.Then, adjust the position of the target board so that the
weight come on the top of the marked point (5 m ahead of the
vehicle) and face to the vehicle.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Laser Beam Aiming Adjustment (Cont’d)
EL-287
SKIA1213E
3.
Adjust the position of the target board so that the extended line
that links the center of the rear windshield and the center of the
front windshield align with the weight suspended from the
board.
4.
Remove the thread suspended to the left side of board and
suspend a thread with weight on tip on the center of the target
board. Then mark the point of weight on the ground.
SKIA1214E
5.
Pivot the edge of the target board 20-degree to either side.
NOTE:
50 mm (1.97 in) shift rates the 20-degree movement.
SEL509Y
6.
Do not place anything in the space shown in the figure (view
from top).
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Laser Beam Aiming Adjustment (Cont’d)
EL-288
SKIA1216E
NOTE:
In case the space shown in the illustration is not available, make
space by covering the side of the target board with a 400 mm
(15.75 in)-size frosted black board or black cloth.
AIMING ADJUSTMENT
NBEL0462S05
CAUTION:
Complete all necessary work for laser beam adjustment until
the adjustment completes as shown in the procedure. If the
procedure does not complete, the ICC system is inoperative.
1.
Turn ignition switch OFF.
SEL670Y
2.
Connect “CONSULT-II” and “CONSULT-II CONVERTER” to
the data link connector. Then, start the engine, wait for at least
10 sec., and touch “START”.
SKIA3098E
3.
Turn ignition switch “ON”.
4.
Touch “START (NISSAN BASED VHCL)”.
SEL510Y
5.
Touch “ICC”.
If “ICC” is not indicated, go to GI-42, “CONSULT-II Data Link
Connector (DLC) Circuit”.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Laser Beam Aiming Adjustment (Cont’d)
EL-289
SKIA1218E
6.
Touch “WORK SUPPORT”.
SKIA1219E
7.
Touch “LASER BEAM ADJUST”.
SKIA1220E
8.
Touch “START”.
CAUTION:
If the adjustment screen does not appear on CONSULT-II 10
sec. after touching “LASER BEAM ADJUST” screen, the fol-
lowing causes may be considered:
쐌
Target is not set accurately.
쐌
There is not enough space beside the target.
쐌
Deformation of vehicle or the surrounding equipment unit,
bracket, or the surrounding equipment is causing inappro-
priate installation of sensor and aiming may be set out of
the adjustable range.
쐌
The area is not suitable for the adjustment work.
쐌
ICC sensor is not clean.
쐌
Laser beam adjustment may not be processed if some-
thing interrupts the laser beam.
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Laser Beam Aiming Adjustment (Cont’d)
EL-290
SKIA1221E
SEL511Y
9.
After the CONSULT-II displays “ADJUST THE VERTICAL OF
LASER” turn the up-down direction adjustment screw until
“U/D CORRECT” value is set in the range of
±
4.
CAUTION:
Turn the screw slowly. The value change on display is slower
than actual movement of the ICC sensor. Wait for 2 seconds
every time the screw is turned half a rotation.
NOTE:
Turning the screw to the right lifts the aiming and to the left lowers
the aiming.
SKIA1223E
10. When “U/D CORRECT” value indicates
±
4, confirm that the
margin of value remains within
±
4 at least for 2 seconds with
no equipment or hand touching the ICC sensor.
When “COMPLETED THE VERTICAL AIMING OF LASER
BEAM” appears on screen, touch “END”.
CAUTION:
Be sure that the margin of “U/D CORRECT” is within
±
4 with
ICC sensor unit is untouched.
SKIA1224E
11. Confirm
that
“ADJUSTING
AUTOMATIC
HORIZONTAL
LASER BEAM AIMING” is on screen and wait for a while
(maximum: 10 sec.).
SKIA1225E
12. Confirm that “NORMALLY COMPLETED” is displayed on
CONSULT-II and close the aiming adjustment procedure by
touching “END”.
CAUTION:
Complete all the procedures once “LASER BEAM ADJUST”
mode is entered in CONSULT-II. When the procedure is
discontinued, the ICC system is inoperable.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Laser Beam Aiming Adjustment (Cont’d)
EL-291
Check After The Adjustment
NBEL0462S0501
Test the ICC system operation by running test. Refer to “ICC sys-
tem running test” EL-284.
INTELLIGENT CRUISE CONTROL (ICC) SYSTEM
Laser Beam Aiming Adjustment (Cont’d)
EL-292
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст