2005 INFINITI QX4 air condition

BL-118
AUTOMATIC BACK DOOR SYSTEM
Revision: October 20052005 QX56
2. CHECK GLASS HATCH AJAR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect glass hatch ajar switch, BCM and back door control unit.
3. Check continuity between glass hatch ajar switch connector D707 terminal + and BCM connector M19 ter-
minal 42.
4. Check continuity between glass hatch ajar switch connector
D707 terminal + and back door control unit connector B55 termi-
nal 17.
5. Check continuity between glass hatch ajar switch connector
D707 terminal + and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK GLASS HATCH AJAR SWITCH
1. Disconnect glass hatch ajar switch connector.
2. Check continuity between glass hatch ajar switch connector terminal and ground.
OK or NG
OK >> Check glass hatch ajar switch case ground condition.
NG >> Replace glass hatch ajar switch, or repair or replace
harness.
Back Door Close (Close) Switch System InspectionEIS008RE
1. BACK DOOR CLOSE SWITCH FUNCTION INSPECTION
Check back door close (close) switch using switch operation.
OK or NG
OK >> Back door close switch is OK.
NG >> GO TO 2.+ - 42 : Continuity should exist
+ - 17 : Continuity should exist
+ - Ground : Continuity should not exist
LIIA1547E
Terminals Condition Continuity
Glass hatch ajar
switch + – GroundOpen Yes
Closed No
LIIA1151E

AUTOMATIC BACK DOOR SYSTEM
BL-119
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Revision: October 20052005 QX56
2. BACK DOOR CLOSE SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the back door close switch, check voltage
between back door control unit connector B55 terminal 8 and
ground.
OK or NG
OK >> Back door close switch is OK.
NG >> GO TO 3.
3. BACK DOOR CLOSE SWITCH CIRCUIT INSPECTION
1. Disconnect back door close switch and back door control unit connector.
2. Check continuity between back door close switch connector B63
terminal 1 and back door control unit connector B55 terminal 8.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. BACK DOOR CLOSE SWITCH GROUND INSPECTION
Check continuity between back door close switch connector B63 ter-
minal 3 and ground.
OK or NG
OK >> Replace the back door close switch.
NG >> Repair or replace harness.
Back Door Close (Cancel) Switch System InspectionEIS0 08 RF
1. BACK DOOR CLOSE SWITCH FUNCTION INSPECTION
Check back door close (cancel) switch using switch operation.
OK or NG
OK >> Back door close switch is OK.
NG >> GO TO 2.
Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
8 GroundBack door
close switchON 0
OFF Battery voltage
LIIA0805E
1 - 8 : Continuity should exist.
LIIA1066E
3 - Ground : Continuity should exist.
WIIA0602E

BL-120
AUTOMATIC BACK DOOR SYSTEM
Revision: October 20052005 QX56
2. BACK DOOR CLOSE (CANCEL) SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the back door close (cancel) switch, check volt-
age between back door control unit connector B55 terminal 13
and ground.
OK or NG
OK >> Back door close switch is OK.
NG >> GO TO 3.
3. BACK DOOR CLOSE (CANCEL) SWITCH CIRCUIT INSPECTION
1. Disconnect back door close switch and back door control unit connector.
2. Check continuity between back door close switch connector B63
terminal 5 and back door control unit connector B55 terminal 13.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. BACK DOOR CLOSE SWITCH GROUND INSPECTION
Check continuity between back door close switch connector B63 ter-
minal 3 and ground.
OK or NG
OK >> Replace the back door close switch.
NG >> Repair or replace harness.
Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
13 GroundBack door
close switchCancel (ON) 0
Cancel (OFF) 9
LIIA1068E
5 - 13 : Continuity should exist.
LIIA1069E
3 - Ground : Continuity should exist.
WIIA0602E

AUTOMATIC BACK DOOR SYSTEM
BL-121
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Revision: October 20052005 QX56
Pinch Strip System InspectionEIS008RG
1. PINCH STRIP SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the pinch strip, check voltage between back
door control unit connector B55 terminals 19, 20 and ground.
OK or NG
OK >> Pinch strip switch is OK.
NG >> GO TO 2.
2. PINCH STRIP CIRCUIT INSPECTION
1. Disconnect pinch strip and back door control unit.
2. Check continuity between pinch strip connector D715 (RH),
D517 (LH) terminal 1, 2 and back door control unit connector
B55 terminal 5, 19 (RH), 20 (LH).
OK or NG
OK >> GO TO 3.
NG >> Repair the harness between the pinch strip and the back
door control unit.
3. PINCH STRIP GROUND INSPECTION
1. Connect back door control unit connector.
2. Check continuity between pinch strip connector terminal 2 and
ground.
OK or NG
OK >> Replace the pinch strip.
NG >> Repair or replace harness.
Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
19
20GroundPinch strip operation 0
Other 4
LIIA0811E
1 - 19 : Continuity should exist.
1 - 20 : Continuity should exist.
2 - 5 : Continuity should exist.
LIIA0815E
2 - Ground : Continuity should exist.
LIIA0817E

AUTOMATIC BACK DOOR SYSTEM
BL-125
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Revision: October 20052005 QX56
2. CLOSE SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit.
2. Check continuity between back door latch (close switch) con-
nector D503 terminal 5 and back door control unit connector
B55 terminal 14.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CLOSE SWITCH GROUND INSPECTION
Check continuity between back door latch (close switch) connector
D503 terminal 8 and ground.
OK or NG
OK >> Replace the back door latch.
NG >> Repair or replace harness.
Back Door Handle Switch System InspectionEIS008RL
1. BACK DOOR HANDLE SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the back door handle switch, check voltage
between back door control unit connector B55 terminal 26 and
ground.
OK or NG
OK >> Back door handle switch is OK.
NG >> GO TO 2.5 - 14 : Continuity should exist.
LIIA0832E
8 - Ground : Continuity should exist.
LIIA0828E
Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
26 GroundBack door handle switch (ON) 0
Other (OFF) Battery voltage
LIIA0833E

BL-154
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: October 20052005 QX56
Diagnostic Procedure 6EIS008SA
“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”
1. CHECK FUSE
Check 10A fuse [No.19, located in the fuse block (J/B)]
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2. CHECK SECURITY INDICATOR LAMP
1. Start engine and turn ignition switch OFF.
2. Check the security indicator lamp lights up.
OK or NG
OK >> Inspection End.
NG >> GO TO 3.
3. CHECK SECURITY INDICATOR LAMP POWER SUPPLY CIRCUIT
1. Disconnect security indicator lamp.
2. Check voltage between security indicator lamp connector M24
terminal 8 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. CHECK BCM (NATS CONTROL UNIT) FUNCTION
1. Connect security indicator lamp.
2. Disconnect BCM.
3. Check voltage between BCM connector M18 terminal 23 and
ground.
OK or NG
OK >> BCM is malfunctioning.

Replace BCM. Ref. part No. A

Perform initialization with CONSULT-II.

For initialization, refer to “CONSULT-II Operation
Manual NATS-IVIS/NVIS”.
NG >> Check the following:

Harness for open or short between security indicator lamp and BCM (NATS control unit).

Indicator lamp condition Security indicator lamp should light up.
8 - Ground :Battery voltage
LIIA1072E
23 - Ground :Battery voltage
LIIA0523E

BR-28
REAR DISC BRAKE
Revision: October 20052005 QX56
CAUTION:

Do not reuse copper washers.

Securely attach brake hose to protrusion on cylinder body.
4. Refill new brake fluid and bleed air as necessary. Refer to BR-10, "
Bleeding Brake System" .
5. Install tires to the vehicle. Refer to WT-7, "
Rotation" .
Disassembly and Assembly of Brake CaliperEFS004WP
DISASSEMBLY
1. Remove pads from cylinder body.
2. Remove sliding sleeve and boot from cylinder body.
3. Place a wooden block as shown in the figure, and blow air from
union bolt mounting hole to remove piston and piston boot.
CAUTION:
Do not get your fingers caught in piston.
4. Using a flat-bladed screwdriver, remove piston seal from cylin-
der body.
CAUTION:
Be careful not to damage cylinder body inner wall.
CALIPER INSPECTION
Cylinder Body
CAUTION:

Use new brake fluid to clean. Do not use mineral oils such as gasoline or kerosene. Refer to MA-
11, "RECOMMENDED FLUIDS AND LUBRICANTS" .

Check inside surface of cylinder body for score, rust wear, damage or foreign materials. If any of
the above conditions are observed, replace cylinder body.

Minor damage from rust or foreign materials may be eliminated by polishing surface with a fine
emery paper. Replace cylinder body if necessary.
Torque Member
Check for wear, cracks, and damage. If damage or deformation is present, replace the affected part.
Piston
CAUTION:

Piston sliding surface is plated, do not polish with emery paper even if rust of foreign materials
are stuck to sliding surface.

Check piston for score, rust, wear, damage or presence of foreign materials. Replace if any of the
above conditions are observed.
Sliding Pin Bolts and Sliding Pin Boots
Make sure there is no wear, damage, or cracks in sliding sleeve and sliding sleeve boots, and if there are,
replace them.
BRD0041D
PFIA0269E

TROUBLE DIAGNOSIS
BRC-11
[VDC/TCS/ABS]
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Revision: October 20052005 QX56
TROUBLE DIAGNOSISPFP:00000
How to Perform Trouble Diagnoses for Quick and Accurate RepairEFS004XJ
INTRODUCTION
The ABS/TCS/VDC system has an electronic control unit to control
major functions. The control unit accepts input signals from sensors
and controls actuator operation. It is also important to check for con-
ventional problems such as air leaks in the booster or lines, lack of
brake fluid, or other problems with the brake system.
It is much more difficult to diagnose a problem that occurs intermit-
tently rather than continuously. Most intermittent problems are
caused by poor electrical connections or faulty wiring. In this case,
careful checking of suspicious circuits may help prevent the replace-
ment of good parts.
A visual check only may not find the cause of the problem, so a road
test should be performed.
Before undertaking actual checks, take just a few minutes to talk with
a customer who approaches with an ABS/TCS/VDC complaint. The
customer is a very good source of information on such problems,
especially intermittent ones. Through the talks with the customer,
find out what symptoms are present and under what conditions they
occur.
Start your diagnosis by looking for “conventional” problems first. This
is one of the best ways to troubleshoot brake problems on an ABS/
TCS/VDC equipped vehicle. Also check related Service Bulletins for
information.
SEF 2 33 G
SEF 2 34 G