warning INFINITI QX56 2006 Factory Repair Manual

AUTOMATIC BACK DOOR SYSTEMBL-111
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Terminals and Reference Value for Back Door Control UnitEIS00610
Te r m i n a l Wire
Color Item
Condition Voltage (V)
(Approx.)
1 B Ground ——
2 B Ground ——
3 Y/R Battery power supply —Battery voltage
4 G Hazard lamp output Request to flash hazardsPulse must be >50ms
but less than 250ms
5 B/P Pinch strip ground ——
6 R Warning chime output Back door motor activeBattery voltage
7 G/R Ignition switch Ignition switch ON
Battery voltage
Ignition switch OFF 0
8 GR/B Back door close switch CLOSE position (ON)
0
NEUTRAL position (OFF) Battery voltage
9 L Warning chime ground ——
10 L/B Battery power supply —Battery voltage
11 YCinch latch motor
CLOSE output
Back door close operation
Battery voltage
12 L Closure motor
RETURN output Back door release operation
Battery voltage
13 P/L Back door close switch CANCEL position
0
NEUTRAL position 5
14 P Close switch signal While fully opening back door
15 O/L Open switch signal While fully closing back door
17 GR Glass hatch ajar signal Glass hatch OPEN
0
Glass hatch CLOSED 5
18 GR/R Park switch P or N position (Ignition is ON)
0
Other (Ignition is ON) 9
19 BR/B Pinch strip RH Detecting obstruction
0
Other 5
20 V/G Pinch strip LH Detecting obstruction
0
Other 5
PIIA3278E
WIIA1047E
WIIA1047E

AUTOMATIC BACK DOOR SYSTEMBL-113
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Trouble Diagnosis ProcedureEIS00612
1. Check the trouble symptom and customer's requests.
2. Understand outline of system. Refer to BL-45, "
System Description" .
3. Confirm system operation.
4. Perform self-diagnosis procedures. Refer to BL-113, "
Self-Diagnosis Procedures" .
5. Refer to diagnosis chart by symptom, repair or replace any malfunctioning parts. Refer to BL-114, "
Diag-
nosis Chart" .
6. Inspection End.
Self-Diagnosis ProceduresEIS00613
INPUT SIGNAL CHECK MODE
Input signal check mode allows testing of switch input signal to the back door control unit.
To activate input signal check mode on the automatic back door, perform the following steps:
1. Turn ignition switch OFF.
2. Turn back door close switch to CANCEL (system cancelled).
3. Place A/T selector lever in P position.
4. Using the inside emergency release lever, open the back door.
5. Have an assistant press and hold the back door handle switch.
6. While the assistant continues to hold the back door handle switch, turn ignition switch ON (DO NOT start engine).
7. After approximately 5 seconds, the back door warning chime will sound for 0.5 seconds.
8. Release the back door handle switch.
9. Within 8 seconds of the back door warning chime sounding, press and hold the power liftgate switch.
10. After approximately 5 seconds, the back door warning chime will sound for 1 second.
11. Release the power liftgate switch.
12. The input signal check mode is now initialized.
The input signal check mode can test the following inputs. The back door warning chime will sound for approx-
imately 0.5 seconds each time a switch signal input occurs. Use this test when one of these inputs is not
responding during normal automatic back door operation.
*Back door warning chime should sound as soon as vehicle moves.
Turn ignition switch OFF to end input signal check mode.
OPERATING CHECK MODE
Operating check mode allows self-diagnosis of the automatic back door system.
To activate operating check mode on the automatic back door, perform the following steps:
1. Turn ignition switch OFF.
2. Turn back door close switch to CANCEL (system cancelled).
3. Place A/T selector lever in P position.
Switch signal OperationRefer to
Power liftgate switch OFF → ON BL-116
Back door close switch (CLOSE) OFF → ON BL-118
Back door close switch (CANCEL) OFF → ON BL-119
Back door handle switch OFF → ON BL-125
Glass switch OFF → ON BL-117
A/T device (park switch) P position → other than P position AT- 6 1
Vehicle speed* Vehicle speed—
Remote keyless entry signal Keyfob switch OFF → ON BL-44
Door lock/unlock signal LOCK → UNLOCK BL-16
Pinch strip LH signal OFF → ON BL-121
Pinch strip RH signal OFF → ON BL-121

BL-114
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
4. Using the inside emergency release lever, open the back door.
5. Have an assistant press and hold the back door handle switch.
6. While the assistant continues to hold the back door handle switch, turn ignition switch ON (DO NOT start
engine).
7. After approximately 5 seconds, the back door warning chime will sound for 0.5 seconds.
8. Release the back door handle switch.
9. Within 8 seconds of the back door warning chime sounding, press the power liftgate switch 5 times in rapid succession.
10. After approximately 5 seconds, the back door warning chime will sound for 1 second.
11. Release the power liftgate switch.
12. Immediately close the back door manually.
13. Press and release the power liftgate switch to activate operating check mode.
Self-diagnosis results are indicated by the back door warning chime.
Turn ignition switch OFF to end input signal check mode.
Diagnosis ChartEIS00614
Back door warning chime order Back door warning chime length
Start self-diagnosis 1.5 seconds
OK NG
1. Operating conditions diagnosis 0.5 seconds0.2 seconds
2. Back door encoder diagnosis 0.5 seconds0.2 seconds
3. Back door clutch diagnosis 0.5 seconds0.2 seconds
4. Back door motor diagnosis 0.5 seconds0.2 seconds
5. Cinch latch motor diagnosis 0.5 seconds0.2 seconds
Restart self-diagnosis 1.5 seconds
ItemNG ResultRefer to
1. Operating conditions diagnosis result One of the following operating conditions no
longer met: ignition switch ON, back door
close switch (CANCEL) ON, A/T selector lever
in P position—
2. Back door encoder diagnosis result Sensor diagnosis/short, pulse signal, pulse
signal directionBL-135
3. Back door clutch diagnosis result
Back door clutch does not operateBL-135
4. Back door motor diagnosis result Back door motor does not operate (no operat-
ing current)BL-135
5. Cinch latch motor diagnosis result Cinch latch motor does not operate (no oper-
ating current)
BL-135
Symptom
Suspect systemsRefer to
Automatic operations are not executed from the back door fully
closed or fully open position.
(Auto closure operates normally.) Power liftgate switch system inspection
BL-116
Park switch —
Power window serial link BL-112
Pinch strip system inspectionBL-121
Automatic operations are not carried out together with open/close
operations.
(Manual operations are normal.) Power liftgate switch system inspection
BL-116Back door close switch system inspectionBL-118
Auto back door power supply and ground cir-
cuit system inspection.BL-115
The auto closure function does not operate.
(Stops at the halfway position for auto closing operations.) Pinch strip system inspection
BL-121

AUTOMATIC BACK DOOR SYSTEMBL-115
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Back Door Power Supply and Ground Circuit InspectionEIS00615
1. BACK DOOR POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect back door control unit.
3. Check voltage between back door control unit connector B55 terminals 3, 10 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. BACK DOOR GROUND CIRCUIT INSPECTION
Check continuity between back door control unit connector B55 ter-
minal 1, 2 and ground.
OK or NG
OK >> Circuit is OK.
NG >> Repair or replace harness.
During auto closing operations, if obstruction is detected, the
door does not operate in reverse. Back door motor assembly
—
During close or cinch operations, the door does not operate in
reverse if the back door handle is operated. Handle switch system
BL-125
When the keyfob is operated, the back door does not operate
automatically. Remote keyless entry system inspection
BL-44Power window serial linkBL-112
Pinch strip system inspectionBL-121
Auto closure does not operate. Half-latch switch system
BL-122Cinch latch motor systemBL-126
Handle switch systemBL-125
The back door does not open.
(Closure motor rotation is not reversed.) Open switch system
BL-123
Handle switch systemBL-125
Warning chime does not sound. Back door warning chime systemBL-122
Auto closure operation works, but the back door is not fully
closed Close switch system
BL-124Handle switch systemBL-125
Cinch latch motor systemBL-126
Back door latch assembly mechanism dam-
aged or worn. —
Symptom
Suspect systemsRefer to
3 - Ground: Approx. battery voltage
10 - Ground : Approx. battery voltage
WIIA0567E
1 - Ground: Continuity should exist.
2 - Ground : Continuity should exist.
LIIA0801E

BL-122
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
Back Door Warning Chime System InspectionEIS0061A
1. BACK DOOR WARNING CHIME CIRCUIT INSPECTION
1. Disconnect back door warning chime and back door control unit.
2. Check continuity between back door warning chime connector D514 terminal 1 and back door control unit connector B55 termi-
nal 6.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. WARNING CHIME CIRCUIT INSPECTION
Check continuity between back door warning chime connector D514
terminal 2 and back door control unit connector B55 terminal 9.
OK or NG
OK >> Replace warning chime.
NG >> Repair or replace harness.
Half-Latch Switch System InspectionEIS0061B
1. HALF-LATCH SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully opening and closing the back door, check voltage between back door control unit connector B55 terminal 22 and
ground.
OK or NG
OK >> Half-latch switch is OK.
NG >> GO TO 2. 1 - 6
: Continuity should exist.
LIIA0822E
2 - 9: Continuity should exist.
LIIA2182E
22 - Ground
LIIA0826EPIIA2169E

BL-130
DOOR
Revision: November 20092006 QX56
5. Remove the door-side hinge nuts and bolts, and remove the
door assembly.
Installation is in the reverse order of removal.
BACK DOOR
WARNING:
Always support back door when removing or replacing back door stays. Power back door opener will
not support back door with back door stays removed.
1. Remove the back door glass. Refer to GW-13, "
REAR WINDOW GLASS AND MOLDING" .
2. Remove the back door lock assembly. Refer to BL-135, "
BACK DOOR LOCK" .
3. Remove the rear wiper motor. Refer to WW-50, "
Rear Wiper Motor" .
4. Remove the back door wire harness.
5. Remove the rear washer nozzle and hose from the back door. Refer to WW-51, "
Rear Washer Nozzle" .
CAUTION:
Two technicians should be used to avoid damaging the back door during removal.
6. Support the back door.
7. Disconnect the power back door lift arm from the door.
8. Remove the back door stays.
9. Remove the door side nuts and the back door assembly.
Installation is in the reverse order of removal.
LIIA1504E
WIIA1364E

BODY REPAIRBL-193
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Replacement OperationsEIS004TH
DESCRIPTION
This section is prepared for technicians who have attained a high level of skill and experience in repairing col-
lision-damaged vehicles and also use modern service tools and equipment. Persons unfamiliar with body
repair techniques should not attempt to repair collision-damaged vehicles by using this section.
Technicians are also encouraged to read Body Repair Manual (Fundamentals) in order to ensure that the orig-
inal functions and quality of the vehicle can be maintained. The Body Repair Manual (Fundamentals) contains
additional information, including cautions and warnings, that are not including in this manual. Technicians
should refer to both manuals to ensure proper repairs.
Please note that this information is prepared for worldwide usage, and as such, certain procedures may not
apply in some regions or countries.

PRECAUTIONSBR-3
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EFS004VW
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:

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.

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.

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.
Precautions for Brake SystemEFS004VX

Always use recommended brake fluid. Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" .

Do not reuse drained brake fluid.

Be careful not to splash brake fluid on painted areas.

To clean or wash all parts of master cylinder, disc brake caliper and wheel cylinder, use clean brake fluid.

Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.

Use flare nut wrench when removing and installing brake tube.

Always check tightening torque when installing brake lines.

Before working, turn ignition switch to OFF and disconnect con-
nectors for ABS actuator and electric unit (control unit) or battery
terminals.

Burnish the brake contact surfaces after refinishing or replacing
drums or rotors, after replacing pads or linings, or if a soft pedal
occurs at very low mileage.
Refer to BR-25, "
BRAKE BURNISHING PROCEDURE" .
WARNING:

Clean brake pads and shoes with a waste cloth, then wipe
with a dust collector.SBR686C

BR-8
BRAKE PEDAL
Revision: November 20092006 QX56
Removal and Installation EFS0068Q
REMOVAL
WARNING:
Do not deform the brake tube.
CAUTION:

Before removal and installation the accelerator and brake pedals must be in the forward most
position (closest to the floor). This is to align the base position of the accelerator and brake ped-
als.

Do not disassemble the brake pedal adjusting mechanism.

Avoid damage from dropping the brake pedal assembly during handling.

Keep the brake pedal assembly away from water.
1. Remove the lower driver instrument panel. Refer to IP-13, "
INSTRUMENT LOWER COVER LH" .
2. Remove the stop lamp switch and ASCD switch from the pedal assembly.
1. Brake pedal assembly 2. Snap pin 3. Clip
4. Stop lamp switch 5. Pedal pad 6. Clevis pin
7. ASCD cancel switch
WFIA0232E

BR-10
BRAKE FLUID
Revision: November 20092006 QX56
BRAKE FLUIDPFP:KN100
On-board InspectionEFS004W2
LEVEL CHECK

Make sure the fluid level in reservoir tank is within the standard
(between MAX and MIN lines).

Visually check around reservoir tank for fluid leaks.

If fluid level is excessively low, check brake system for leaks.

If brake warning lamp remains illuminated after parking lever is
released, check brake system for fluid leakage.
Drain and RefillEFS004W3
CAUTION:

Refill with new brake fluid. Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" .

Do not reuse drained brake fluid.

Do not let brake fluid splash on the painted surfaces of the body. This might damage the paint, so
when splashing it, immediately wipe off the area and wash away with water.

Before servicing, disconnect actuator connector or battery negative cable.
1. Connect a vinyl tube to each bleed valve.
2. Depress brake pedal, loosen each bleed valve, and gradually remove brake fluid.
3. Make sure there is no foreign material in reservoir tank, and refill with new brake fluid.
4. Rest foot on brake pedal. Loosen bleed valve. Slowly depress pedal until it stops. Tighten bleed valve. Release brake pedal.
Repeat this process a few times, then pause to add new brake
fluid to master cylinder. Continue until new brake fluid flows out.
Bleed air from brake system. Refer to BR-11, "
Bleeding Brake
System" .
LFIA0225E
SBR419C
SBR995