ignition INFINITI QX56 2004 Factory Service Manual

ACC-2Revision: August 2007
ACCELERATOR CONTROL SYSTEM
2004 QX56
ACCELERATOR CONTROL SYSTEMPFP:18005
Removal and InstallationEBS00IKW
Adjustable Accelerator Pedal
CAUTION:

Do not disassemble the accelerator pedal adjusting mechanism.

Before removal and installation the accelerator and brake pedals must be in the frontmost posi-
tion. This is to align the base position of the accelerator and brake pedals.

Do not disassemble the accelerator pedal assembly.

Do not remove the accelerator pedal position sensor from the accelerator pedal bracket.

Avoid damage from dropping the accelerator pedal assembly during handling.

Keep the accelerator pedal assembly away from water.
REMOVAL
1. Move the accelerator and brake pedals to the frontmost position.
2. Turn the ignition switch OFF and disconnect the negative battery terminal.
3. Disconnect the adjustable brake pedal cable from the adjustable brake pedal.

Unlock, then pull the adjustable brake pedal cable to disconnect it from the adjustable brake pedal.
LBIA0379E
1. Adjustable accelerator pedal assem-
bly2. A/T control cable mounting bracket (part
of the accelerator pedal assembly)3. Adjustable pedal electric motor (part
of the accelerator pedal assembly)
4. Adjustable brake pedal cable (part
of the accelerator pedal assembly)

ACTION TEST
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ACTION TESTPFP:00000
ICC System Running TestEKS007YE
VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
SET CHECKING
1. Press the ON/OFF switch for less than 1.5 seconds.
2. Drive the vehicle between 25 MPH (40 km/h) and 89 MPH (144 km/h).
3. Push the COAST/SET switch.
4. Confirm that the desired speed is set as the COAST/SET switch is released.
NOTE:

When there is no vehicle ahead, drive at the set speed steadily.

When there is a vehicle ahead, control to maintain distance from the vehicle ahead, watching its speed.

The set vehicle speed is displayed on the ICC system indicator in the combination meter.
CHECK FOR INCREASE OF THE CRUISING SPEED
1. Set vehicle-to-vehicle distance control mode at desired speed.
2. Check if the set speed increases by 1 MPH (1 km/h) as ACCEL/RES switch is pushed.
NOTE:
The maximum set speed of the vehicle-to-vehicle distance control mode is 89 MPH (144 km/h).
CHECK FOR DECREASE OF THE CRUISING SPEED
1. Set vehicle-to-vehicle distance control mode at desired speed.
2. Check if the set speed decreases by 1 MPH (1 km/h) as COAST/SET switch is pushed.
NOTE:

Vehicle-to-vehicle distance control mode is automatically turned off when the driving speed lowers to 20
MPH (32 km/h) due to the deceleration of the vehicle ahead.

The minimum set speed of the vehicle-to-vehicle distance control mode is 25 MPH (40 km/h).
CHECK FOR THE CANCELLATION OF VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
(NORMAL DRIVING CONDITION) IN THE FOLLOWING CASES:
1. When the brake pedal is depressed after the system is turned on.
2. When the A/T select lever is shifted into gears other than “D”, including manual shifts.
3. When the system is turned off.
4. When CANCEL switch is operated.
CHECK FOR RESTORING THE SPEED THAT IS SET BY VEHICLE-TO-VEHICLE DISTANCE
CONTROL MODE BEFORE CANCELLATION
1. Cancel the system by depressing the brake. Then, check that the speed before cancellation is restored
when pressing ACCEL/RES switch with vehicle speed at 25 MPH (40 km/h) or above.
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 when driving 25 MPH
(40 km/h) or above, after canceling vehicle-to-vehicle distance control mode by operating the CANCEL
switch.
CHECK ON/OFF SWITCH OPERATION
1. Start the engine. Then, check that the following operations are
performed correctly.
2. Vehicle-to-vehicle distance control mode is displayed when ON/
OFF switch is pressed ON. Vehicle-to-vehicle distance control
mode goes off when ON/OFF switch is turned to OFF.
3. Turn off the ignition switch while ON/OFF switch is ON. Turn the
ignition switch back to ON and confirm that CRUISE lamp and
ICC system display are OFF.
WKIA1978E

ACTION TEST
ACS-11
[ICC]
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CHECK FOR INCREASE OF THE CRUISING SPEED
1. Set the conventional (fixed speed) cruise control mode at desired speed.
2. Check if the set speed increases by 1 MPH (1.6 km/h) as ACCEL/RES switch is pushed.
NOTE:

If the ACCEL/RES switch is held, the vehicle speed increases until the switch is released.

The maximum set speed is 89 MPH (144 km/h).
CHECK FOR DECREASE OF THE CRUISING SPEED
1. Set the conventional (fixed speed) cruise control mode at desired speed.
2. Check if the set speed decreases by 1 MPH (1.6 km/h) as COAST/SET switch is pushed.
NOTE:

Conventional (fixed speed) cruise control mode is automatically turned off when the driving speed lowers
to 20 MPH (32 km/h).

The lowest set speed is 25 MPH (40 km/h).
CHECK FOR THE CANCELLATION OF CONVENTIONAL (FIXED SPEED) CRUISE CONTROL
MODE (NORMAL DRIVING CONDITION) IN THE FOLLOWING CASES:
Refer to ACS-9, "CHECK FOR THE CANCELLATION OF VEHICLE-TO-VEHICLE DISTANCE CONTROL
MODE (NORMAL DRIVING CONDITION) IN THE FOLLOWING CASES:"
CHECK FOR RESTORING THE SPEED THAT IS SET BY CONVENTIONAL (FIXED SPEED)
CRUISE CONTROL MODE BEFORE ICC CANCELLATION
Refer to ACS-9, "CHECK FOR RESTORING THE SPEED THAT IS SET BY VEHICLE-TO-VEHICLE DIS-
TANCE CONTROL MODE BEFORE CANCELLATION"
CHECK ON/OFF SWITCH OPERATION
1. Start the engine. Then, check that the following operations are
performed correctly.
2. CRUISE lamp (green) illuminates and ICC system indicator
goes off when ON/OFF switch is pressed ON for more than 1.5
seconds. The CRUISE lamp goes off when ON/OFF switch is
turned to OFF.
3. Turn off the ignition switch while ON/OFF switch is ON. Turn the
ignition switch back to ON and confirm that CRUISE lamp is
OFF.
CHECK FOR ACCEL/RES, COAST/SET, CANCEL SWITCHES
1. Check if ACCEL/RES, COAST/SET, CANCEL switches operate smoothly.
2. Check if switch buttons rebound as the buttons are released.
WKIA2038E

ACS-14
[ICC]
LASER BEAM AIMING ADJUSTMENT
Revision: August 20072004 QX56
4. Pivot the ICC target board on its center mark 20° to either side.
NOTE:
Approx. 50 mm (1.97 in) shift will produce a 20° movement.
5. Remove any items in the space shown in the figure below.
NOTE:
In case the background space shown in the illustration is not available, or if the background is light col-
ored, place a 400 mm (15.75 in) long frosted black board or black cloth to both sides of the ICC target
board.
Sensor AdjustmentEKS007PF
CAUTION:

Complete all necessary steps for laser beam adjustment until the CONSULT-II indicates "COM-
PLETED". If the procedure does not complete, the ICC system is inoperable.

If CONSULT-II is used without connection to the CONSULT-II CONVERTER, malfunctions might be
detected during self-diagnosis.
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to the
data link connector.
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TERMINALS AND REFERENCE VALUE
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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 — —

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ACS-27
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CONSULT-II Function (ICC)EKS007PH
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL)”.
5. Touch “ICC” on the "SELECT SYSTEM" screen.
If “ICC” is not indicated, go to GI-39, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
ICC diagnostic mode Description
WORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the ICC unit for setting the sta-
tus suitable for required operation, input/output signals are received from the ICC unit and received
data is displayed.
SELF-DIAG RESULTS Displays ICC unit self-diagnosis results.
DATA MONITOR Displays ICC unit input/output data in real-time.
CAN DIAG SUPPORT MNTR The results of transmit/receive diagnosis of CAN communication can be read.
ACTIVE TEST Operation of electrical loads can be checked by sending driving signal to them.
ECU PART NUMBER ICC unit part number can be read.
BBIA0369E
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ACS-32
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
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Self-Diagnostic FunctionEKS007PI
WITH CONSULT-II
1. Go to operation check after asking the customer for symptom information. Refer to ACS-9, "ACTION
TEST" .
2. Stop vehicle, turn ignition switch OFF, then connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.
3. With engine started, touch “START”, “ICC”, “SELF-DIAG RESULTS” on CONSULT-II screen in this order.
CAUTION:
If “ICC” cannot be shown after several attempts, the ICC unit may be malfunctioning and should
be replaced. Refer to GI-39, "
CONSULT-II Data Link Connector (DLC) Circuit" .
4. Self-diagnostic result appears on screen. If “NO DTC ···” is shown, check ICC warning lamp. If any mal-
function is indicated, GO TO step 5.
5. Refer to ACS-36, "
Diagnostic Trouble Code (DTC) Chart" , perform appropriate check, and repair or
replace malfunctioning part as necessary.
6. Turn ignition switch OFF.
7. Start engine and touch “START”, “ICC”, “SELF-DIAG RESULT”, and “ERASE” on CONSULT-II.
CAUTION:
DTC of an existing malfunction will not erase. If the memory does not erase, go to step 5.
8. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC warning
lamp does not illuminate.
WITHOUT CONSULT-II
1. Go to operation check after asking the customer for symptom information. Refer to ACS-9, "ACTION
TEST" .
2. Stop the vehicle to start the self-diagnosis.
3. Turn ignition switch OFF.
4. Turn ignition switch ON, and wait 5 seconds. Press ACCEL/RES
switch 5 times, and then press COAST/SET switch 5 times all
within 5 seconds to start self-diagnosis.
CAUTION:

Do not start the engine.

Do not press the ICC ON/OFF switch ON.

When operation above is not completed within the 5 to 10
second window, DTC will not be displayed.

If self-diagnosis mode cannot be started after several
attempts, the ICC unit may be malfunctioning and should be
replaced. Refer to ACS-34, "
SELF-DIAGNOSIS BY ICC SYS-
TEM DISPLAY WILL NOT RUN" .
5. When self-diagnosis mode is started, DTCs are shown on set vehicle speed indicator.
PKIA0363J
WKIA1921E

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ACS-33
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CAUTION:

DTC will disappear after 5 minutes.

When multiple malfunctions are detected, a maximum of 3 code numbers can be stored; the lat-
est malfunction will be displayed first.
6. Check ACS-36, "
Diagnostic Trouble Code (DTC) Chart" , and repair or replace if necessary.
7. After repair, erase DTC stored in the ICC unit. Refer to ACS-33, "
Self-Diagnostic Erasing Method"
8. DTC 55 will be shown.
9. Turn ignition switch OFF to exit the diagnosis.
10. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC warning
lamp does not illuminate.
Self-Diagnostic Erasing Method
1. Stop the vehicle and turn the ignition switch OFF.
2. Turn ignition switch ON and start self-diagnosis.
3. During self-diagnosis mode, press CANCEL switch 5 times, and DISTANCE switch 5 times within a 10
second time period.
CAUTION:

Switch inputs must be received within a 10 second time period.

When operation is not completed within 10 seconds start again from step 1.
4. DTC 55 will be shown.
CAUTION:
DTC of an existing malfunction will not be erased.
5. Turn ignition switch OFF to exit the diagnosis.
6. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC system
warning lamp (orange) does not illuminate.
WKIA1922E

ACS-34
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: August 20072004 QX56
SELF-DIAGNOSIS BY ICC SYSTEM DISPLAY WILL NOT RUN
Self Diagnosis Will Not Run
1. CHECK ICC SYSTEM DISPLAY

When ignition switch is ON, do all displays illuminate?
YES or NO
YES >> GO TO 2.
NO >> GO TO 5.
2. CHECK SELF-DIAGNOSIS

Disconnect ECM connectors, and check for damaged, bent or loose terminals. Securely connect them
again.

Can self-diagnosis for ICC system be performed?
YES or NO
YES >> Inspection End.
NO >> GO TO 3.
WKIA1985E
Component Failure Specific causes
ICC unit power supply malfunction No voltage supply from ignition switch Fuse blown
Harness open
Harness shorted
Ground cable not connected Harness open
Harness shorted
ICC steering switch malfunction No signal transmitted Harness open
Harness shorted
Spiral cable open
Spiral cable shorted
Switch or ECM malfunction
CAN communication system malfunction Signal not transmitted Harness open
Harness shorted
CAN communication outside the stan-
dard
Combination meter system malfunction Indication not possible Indicator malfunction
Indicator segments disappear
ICC unit malfunction Internal malfunction ICC unit

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
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3. CHECK ICC STEERING SWITCH

Check ICC steering switch. Refer to ACS-58, "ICC Steering Switch" .
OK or NG
OK >> GO TO 4.
NG >> Replace ICC steering switch. Refer to ACS-59, "
ICC Steering Switch"
4. CHECK HARNESS BETWEEN ECM AND ICC STEERING SWITCH

Check harness and spiral cable between ECM and ICC steering switch for open or short circuit.
OK or NG
OK >> GO TO 6
NG >> Repair or replace harness or spiral cable between ECM and ICC steering switch.
5. CHECK POWER SUPPLY FOR ICC UNIT

Check ICC unit power supply, and repair if necessary.

When ignition switch is ON, do all displays illuminate?
YES or NO
YES >> Perform self-diagnosis again.
NO >> GO TO 6.
6. CHECK CONNECTOR FOR ICC UNIT

Disconnect ICC unit connectors, and check terminals for bends and looseness. Securely connect them
again.

When ignition switch is ON, do all displays illuminate?
YES or NO
YES >> Perform self-diagnosis again.
NO >> GO TO 7.
7. CHECK CAN COMMUNICATION

Perform self-diagnosis with CONSULT-II, and check CAN communication system for malfunction.
OK or NG
OK >> Replace combination meter. Refer to IP-13, "Combination Meter"
NG >> CAN communication inspection. Refer to ACS-38, "DTC 20 CAN COMM CIRCUIT" .