brake INFINITI QX56 2004 Factory User Guide

TERMINALS AND REFERENCE VALUE
ACS-25
[ICC]
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Revision: August 20072004 QX56
TERMINALS AND REFERENCE VALUEPFP:00000
Terminals and Reference Values for ICC UnitEKS007RQ
Terminals and Reference Values for ICC SensorEKS007RR
Te r m i n a l s
(wire color)
ItemCondition
Voltage (V)
(Approx.)
(+) (–)Ignition
switchOperation
1 (W/L)
2 (W/L)
GroundBattery power supply OFF — Battery voltage
5 (R) CAN-L — — —
7 (B/R) N-P RANGE ON A/T selector lever in "P" or "N" Battery voltage
10 (V/R)
GroundBrake booster signal ON —
14 (W) CAN-H — — —
19 (B)
20 (B)
46 (B)
GroundGround
ON——
29
(BR/W)ICC brake switch
(normally closed)Selector
lever: Not in
“N” or “P”
positionDepress the brake
pedal0
Release the brake
pedalBattery voltage
30 (L) DDL-TX — — —
33 (R/B)
42 (R/B)
GroundIgnition switch power supply ON —
Battery voltage
38 (R/G)Stop lamp switch
(normally open) OFFDepress the brake pedal
Release the brake pedal 0
39 (V/W) DDL-RX — — —
40 (G) Parking brake signal
ONParking brake is ON 0
Parking brake is OFF
Battery voltage
47 (BR) Stop lamp drive output signalBrake operating with ICC system
Brake not operating with ICC sys-
tem0
SKIA1243E
Terminals
(wire color)
ItemCondition
Voltage (V)
(+) (–)Ignition
switchOperation
1 (R/B)
GroundIgnition switch power supply
ON— Battery voltage
2 (W) CAN-H — —
3 (R) CAN-L — —
4 (B) Ground — —

ACS-28
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: August 20072004 QX56
6. Touch “WORK SUPPORT”, “SELF-DIAG RESULTS”, “DATA
MONITOR”, "CAN DIAG SUPPORT MNTR", “ACTIVE TEST” or
“ECU PART NUMBER” on selection screen.
WORK SUPPORT
Work Item
Cause of Auto-Cancel
1. Touch “WORK SUPPORT” on the "SELECT DIAG MODE"
screen.
2. Touch “CAUSE OF AUTO-CANCEL” on the "SELECT WORK
ITEM screen.
3. Cause of automatic cancellation screen will be shown.
4. The last five causes of automatic cancellation of ICC system will
be displayed.
Possible Causes of "Auto-Cancel"
Laser Beam Adjust
For details, refer to ACS-12, "LASER BEAM AIMING ADJUSTMENT" .
SELF-DIAGNOSTIC RESULTS
For details, refer to ACS-36, "Diagnostic Trouble Code (DTC) Chart" .
WKIA2041E
Operation Function
CAUSE OF AUTO-CANCEL Indicates causes of automatic cancellation of the ICC system.
LASER BEAM ADJUST Outputs laser beam, calculates dislocation of the beam, and indicates adjustment direction.
SKIA6191E
Cause of cancellation Description
OPERATING WIPER Windshield wipers were operated at HI or LO speed operation.
OPERATING ABS ABS function was operated.
OPERATING TCS TCS function was operated.
OPERATING VDC VDC function was operated.
OPE SW VOLT CIRC Voltage outside the standard was detected.
LASER SUN BEAM Intense light such as sunlight entered ICC sensor light sensing part.
LASER TEMP Temperature around ICC sensor became low.
OP SW DOUBLE TOUCH ICC steering switches were pressed at the same time.
VDC/TCS OFF SW VDC OFF switch was pressed.
WHEEL SPD UNMATCH Wheel speed became different from AT vehicle speed.
TIRE SLIP Wheel slipped.
PKB SW ON Parking brake is applied.
IGN LOW VOLT Power supply voltage became low.
NO RECORD —

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
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DATA MONITOR
Operation Procedure
1. Touch “DATA MONITOR” on the "SELECT DIAG MODE"
screen.
2. Touch “ECU INPUT SIGNALS”, “MAIN SIGNALS“, or “SELEC-
TION FROM MENU” on "SELECT MONITOR ITEM" screen.
Monitored Item
×: Applicable
WDIA0084E
Monitored Item [unit] MAIN SIGNALSECU
INPUT
SIGNALSSELECTION
FROM MENUDescription
VHCL SPEED SE
[km/h] or [mph]×××Indicates vehicle speed calculated from wheel
speed sensor signal.
SET VHCL SPD
[km/h] or [mph]××Indicates set vehicle speed stored in ICC unit.
THRTL OPENING
[%]×××Indicates throttle angle calculated from signal volt-
age of throttle position sensor.
ENGINE RPM
[rpm]××Indicates engine speed read by ICC unit via CAN
communication (ECM transmits engine speed via
CAN communication).
DISTANCE ADJ
[SHOR/MID/LONG]×××Indicates set distance stored in ICC unit.
WIPER SW
[OFF/LOW/HIGH]××Indicates wiper [OFF/LOW/HIGH] status.
MAIN SW
[ON/OFF]×××Indicates [ON/OFF] status as judged from control
switch signal.
SET/COAST SW
[ON/OFF]×××Indicates [ON/OFF] status as judged from control
switch signal.
CANCEL SW
[ON/OFF]×××Indicates [ON/OFF] status as judged from control
switch signal.
RESUME/ACC SW
[ON/OFF]×××Indicates [ON/OFF] status as judged from control
switch signal.
CRUISE OPE
[ON/OFF]××Indicates whether vehicle speed is being con-
trolled or not (ON means “controlling”).
BRAKE SW
[ON/OFF]×××Indicates [ON/OFF] status as judged from ICC
brake switch signal.
STOP LAMP SW
[ON/OFF]×××Indicates [ON/OFF] status as judged from stop
lamp switch signal.
RELEASE SW NO
[ON/OFF]
××Indicates [ON/OFF] status as judged from release
switch signal.
ON when brake is depressed.
OFF when brake is not depressed.
RELEASE SW NC
[ON/OFF]
××Indicates [ON/OFF] status as judged from release
switch signal.
OFF when brake is depressed.
ON when brake is not depressed.
IDLE SW
[ON/OFF]××Indicates [ON/OFF] status of idle switch read by
ICC unit via CAN communication (ECM transmits
ON/OFF status via CAN communication).

ACS-30
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: August 20072004 QX56
ACTIVE TEST
CAUTION:
Do not perform the active test while driving. Active test cannot be started while ICC system warning
indicator is illuminated.
Active Test
1. Touch “ACTIVE TEST” on "SELECT DIAG MODE" screen.
2. Touch any of “ICC BUZZER 1”, “METER LAMP”, “STOP LAMP”
and “BOOSTER SOL/V 3” on "SELECT TEST ITEM" screen.
3. Touch “START”.
4. Active test screen will be shown.
GEAR
[1, 2, 3, 4, 5]××Indicates AT gear position read by ICC unit via
CAN communication (TCM transmits gear position
via CAN communication).
BUZZER O/P
[ON/OFF] ×Indicates [ON/OFF] status of ICC warning output.
ICC WARNING×NOTE:
This item is displayed but cannot be monitored.
VHCL SPD AT
[km/h] or [mph]
×Indicates vehicle speed calculated from AT vehicle
speed sensor by ICC unit via CAN communication
(TCM transmits AT vehicle speed sensor signal via
CAN communication).
PRESS SENS
[bar]×××Indicates brake fluid pressure value calculated
from signal voltage of pressure sensor.
PRESS SENS 2
[bar]××NOTE:
This item is displayed but cannot be monitored.
D RANGE SW
[ON/OFF]
××Indicates [ON/OFF] status of “D” position read by
ICC unit via CAN communication (TCM transmits
ON/OFF condition of “D” position via CAN commu-
nication).
AT OD OFF
[ON/OFF]×Indicates [ON/OFF] status of OD cancel output
under control.
NP RANGE SW
[ON/OFF]××Indicates PNP switch signal read by ICC unit via
CAN communication. (TCM transmits PNP switch
signal via CAN communication)
DISTANCE×NOTE:
This item is displayed but cannot be monitored.
RELATIVE SPD×NOTE:
This item is displayed but cannot be monitored.
STP LMP DRIVE
[ON/OFF]××Indicates [ON/OFF] status of brake hold relay drive
output. Monitored Item [unit] MAIN SIGNALSECU
INPUT
SIGNALSSELECTION
FROM MENUDescription
SKIA6195E

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
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ICC BUZZER 1

Touch “ON” and “OFF” to check that ICC warning chime oper-
ates as in the following chart.
METER LAMP

Start engine.

Touch “ON” and “OFF” to check that ICC system displays operate as required.

The following ICC lamps will illuminate at the same time,
CRUISE (orange), CRUISE (green), SET and ICC digital dis-
play.
STOP LAMP

Touch “ON” and “OFF” to check that the stop lamps operate as
in the following chart.
BOOSTER SOL/V 3

Touch any of “MODE 1”, “MODE 2”, “MODE 3” to check that fol-
lowing operation condition is caused by operating monitor and
brake pedal.

“START” is displayed 10 seconds after operation start. (Active
test is completed.)
BUZZER O/P ON OFF
Buzzer sound Beep Not activated
SKIA1228E
METER LAMP ON OFF
All ICC system dis-
playsFull illumination OFF
SKIA1231E
STP LMP DRIVE ON OFF
Stop lamp Lamp ON Lamp OFF
SKIA1232E
SKIA1233E

ACS-36
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: August 20072004 QX56
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSPFP:00000
Diagnostic Trouble Code (DTC) ChartEKS007X2
×:Applicable
DTC
No.CONSULT-II screen termsICC sys-
tem
warning
lampFail-safe
Malfunctions detected where...Refer-
ence
page Vehicle-
to-vehi-
cle dis-
tance
control
modeConven-
tional
(fixed
speed)
cruise
control
modeBrake
assist
(with pre-
view
function)
11 CONTROL UNIT××××

ICC unit internal malfunctionACS-37
12 VDC CONTROL UNIT××××

VDC malfunction

Brake booster signal harness is
open or shortedACS-37
20 CAN COMM CIRCUIT××××
ICC unit detected CAN communi-
cation malfunctionACS-38
31 POWER SUPPLY CIR1××××
ICC unit power supply voltage is
excessively low (less than 8V)ACS-38
34 POWER SUPPLY CIR2××××
ICC unit power supply voltage is
excessively high.ACS-38
41 VHCL SPEED SE CIRC××××

Wheel sensor malfunction

ABS actuator and electric unit
(control unit) malfunction

AT vehicle speed sensor mal-
function

TCM malfunctionACS-39
43 VDC/TCS/ABS CIRC××××
VDC/TCS/ABS system malfunc-
tionACS-39
45 BRAKE SW/ STOP L SW××××

ICC brake switch or stop lamp
switch harness is open or shorted

ICC brake switch or stop lamp
switch is stuck to OFF

ICC brake switch or stop lamp
switch is stuck to ONACS-40
46 OPERATION SW CIRC×××

ICC steering switch harness or
spiral cable is open or shorted

ICC steering switch malfunctionACS-41
74 LASER BEAM OFF CNTR×× ×
Laser beam of ICC sensor is off
the aiming pointACS-42
90 STOP LAMP RLY FIX×× ×
Normally open terminal of stop
lamp relay is stuckACS-43
92 ECM CIRCUIT××××

ECM malfunction

Accelerator pedal position sensor
malfunction

ICC unit malfunctionACS-47
96 NP RANGE×××

Park/neutral position switch har-
ness is open or shorted

Park/neutral position switch mal-
function

TCM malfunctionACS-48
97 AT CIRCUIT××
TCM malfunctionACS-48

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
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DTC 11 CONTROL UNITEKS007X3
1. DIAGNOSTIC CHECK
1. Are any items other than “DTC 11 CONTROL UNIT” indicated on self-diagnosis display?
YES or NO
YES >> Repair or replace applicable item. Erase DTC and perform ICC system running test. Then perform
self-diagnosis of ICC system again.
NO >> Replace ICC unit. Refer to ACS-59, "
ICC Unit" . Erase DTC and perform ICC system running
test. Then perform self-diagnosis of ICC system again.
DTC 12 VDC CONTROL UNITEKS008DH
1. DIAGNOSIS CHECK
With CONSULT-II

Perform self-diagnosis of ABS actuator and electric unit (control unit). Is malfunction indicated?
YES or NO
YES >> Repair or replace applicable item. Erase DTC and perform ICC system running test. Then per-
form self-diagnosis of ICC system again.
NO >> GO TO 2.
2. CHECK CONNECTOR ICC UNIT AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
1. Turn ignition switch OFF.
2. Disconnect connectors of ICC unit and ABS actuator and electric unit (control unit), and connect them
securely again. Then erase DTC. Then, perform self-diagnosis of ICC system again.
OK or NG
OK >> Poor connector connection. Check connector housing for disconnected, loose, bent and col-
lapsed terminals. If any malfunction is detected, repair applicable part. After repair, erase DTC
and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NG >> GO TO 3.
98 GEAR POSITION××

TCM malfunction

AT turbine revolution sensor mal-
function

AT vehicle speed sensor mal-
functionACS-49
102 LASER STAIN×× ×
ICC sensor body window has
contaminationACS-49
103 LASER SENSOR FAIL×× ×
ICC sensor internal malfunctionACS-50
104 LASER AIMING INCMP×× ×
Laser beam aiming of ICC sensor
is not adjustedACS-50
107 LASER COMM FAIL×× ×

CAN data received by ICC sen-
sor is strange (from ICC unit,
combination meter or ECM)ACS-51
109 LASER HIGH TEMP×× ×
Temperature around ICC sensor
is excessively highACS-51
DTC
No.CONSULT-II screen termsICC sys-
tem
warning
lampFail-safe
Malfunctions detected where...Refer-
ence
page Vehicle-
to-vehi-
cle dis-
tance
control
modeConven-
tional
(fixed
speed)
cruise
control
modeBrake
assist
(with pre-
view
function)

ACS-40
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: August 20072004 QX56
DTC 45 BRAKE SW/STOP L SWEKS007X8
1. CHECK CONNECTORS FOR ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit connectors, and connect them securely again. Then erase DTC. Then, perform self-
diagnosis of ICC system again.
OK or NG
OK >>
Poor connector connection.

Check connectors. (Check connectors housing for disconnected, loose, bent, and collapsed
terminals. If any malfunction is detected, repair applicable part.) After repair, erase DTC, and
perform ICC system running test. Then perform self-diagnosis of ICC system again.
NG >> GO TO 2.
2. CHECK STOP LAMP SWITCH AND ICC BRAKE SWITCH
With CONSULT-II

With data monitor, check if “STOP LAMP SW” and “BRAKE SW” are operating normally.
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase DTC and perform ICC system running
test. Then perform self-diagnosis of ICC system again.
NG >>

BRAKE SW: GO TO 3.

STOP LAMP SW: GO TO 5.
3. ICC BRAKE SWITCH INSTALLATION AND ADJUSTMENT INSPECTION

Check ICC brake switch for proper installation and adjust if necessary. Refer to BR-6, "BRAKE PEDAL" .
OK or NG
OK >> GO TO 4.
NG >> After adjustment, erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
4. CHECK ICC BRAKE SWITCH

Check ICC brake switch. Refer to ACS-58, "ICC Brake Switch and Stop Lamp Switch" .
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase DTC and perform ICC system running
test. Then perform self-diagnosis of ICC system again.
NG >> Replace ICC brake switch. Erase DTC and perform ICC system running test. Then perform self-
diagnosis of ICC system again.
5. CHECK STOP LAMP ILLUMINATION

Check stop lamp illumination.
OK or NG
OK >> GO TO 6.
NG >>

Check stop lamp circuit.

After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-41
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Revision: August 20072004 QX56
6. CHECK ICC BRAKE HOLD RELAY
1. Turn ignition switch OFF.
2. Remove ICC brake hold relay.
3. Check continuity between terminals of ICC brake hold relay.
OK or NG
OK >> GO TO 7.
NG >> Replace ICC brake hold relay. Erase DTC and perform
ICC system running test. Then perform self-diagnosis of
ICC system again.
7. CHECK ICC BRAKE HOLD RELAY CIRCUIT
1. Disconnect connectors of ICC unit and stop lamp switch.
2. Check continuity between ICC unit harness connector B17 ter-
minal 38 (R/G) and ICC brake hold relay harness connector
E134 terminal 7 (R/G).
3. Check continuity between ICC unit harness connector B17 ter-
minal 38 (R/G) and stop lamp switch harness connector E38 ter-
minal 4 (R/G).
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase
DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NG >>

Repair harness between ICC unit and ICC brake hold relay or stop lamp switch.

After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
DTC 46 OPERATION SW CIRCEKS007X9
1. CHECK ECM CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect ECM connector, and connect it securely again. Then erase DTC. Then, perform self-diagnosis
of ICC system again.
OK or NG
OK >>
Poor connector connection.

Check connector. (Check connector housing for disconnected, loose, bent, and collapsed ter-
minals. If any malfunction is detected, repair applicable part.) After repair, erase DTC, and per-
form ICC system running test. Then perform self-diagnosis of ICC system again.
NG >> GO TO 2.
2. CHECK ICC STEERING SWITCH

Check ICC steering switch. Refer to ACS-58, "ICC Steering Switch" .
OK or NG
OK >> GO TO 3.
NG >> Replace ICC steering switch assembly. Refer to ACS-59, "
ICC Steering Switch" . Erase DTC and
perform ICC system running test. Then perform self-diagnosis of ICC system again. 7 - 6 Continuity should not exist.
4 - 3 Continuity should exist.
SKIA6651E
Continuity should exist.
Continuity should exist.
WKIA3403E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
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DTC 90 STOP LAMP RLY FIXEKS007XF
1. CHECK ICC UNIT CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect and check ICC unit connector.
OK or NG
OK >> GO TO 2.
NG >>

Connector malfunction.

After repair, erase DTC, and perform ICC system running test. Then perform self-diagnosis of
system.
2. CHECK STOP LAMP SWITCH AND ICC BRAKE SWITCH
With CONSULT-II
1. Connect ICC unit connector and turn ignition switch ON.
2. With data monitor, check that “STOP LAMP SW” and “BRAKE SW” operate normally.
OK or NG
OK >> GO TO 11.
NG >>

BRAKE SW: GO TO 3.

STOP LAMP SW: GO TO 8.
3. CHECK AND ADJUST ICC BRAKE SWITCH

Check ICC brake switch for proper installation and adjust if necessary. Refer to BR-6, "BRAKE PEDAL" .
OK or NG
OK >> GO TO 4.
NG >> After adjustment, erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
4. CHECK ICC BRAKE SWITCH

Check ICC brake switch. Refer to ACS-58, "ICC Brake Switch and Stop Lamp Switch" .
OK or NG
OK >> GO TO 5.
NG >> Replace ICC brake switch. Erase DTC and perform ICC system running test. Then perform self-
diagnosis of ICC system again.
5. CHECK ICC BRAKE HOLD RELAY

Disconnect ICC brake hold relay, and check continuity between
ICC brake hold relay terminal 4 and terminal 3.
OK or NG
OK >> GO TO 6.
NG >> Replace ICC brake hold relay. Erase DTC and perform
ICC system running test. Then perform self-diagnosis of
ICC system again.
Continuity should exist.
SKIA6658E