2007 INFINITI QX56 air condition

BL-98
< SERVICE INFORMATION >
AUTOMATIC BACK DOOR SYSTEM
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 InspectionINFOID:0000000003532968
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.
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
Terminals Condition Continuity
Glass hatch ajar
switch + – GroundOpen Yes
Closed No
LIIA1151E
Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
8GroundBack door
close switchON 0
OFF 5
LIIA0805E
1 - 8 : Continuity should exist.
LIIA1066E

AUTOMATIC BACK DOOR SYSTEM
BL-99
< SERVICE INFORMATION >
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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 InspectionINFOID:0000000003532969
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.
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 INSPECTION3 - Ground : Continuity should exist.
WIIA0602E
Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
13 GroundBack door
close switchON 0
OFF Battery voltage
LIIA1068E
5 - 13 : Continuity should exist.
LIIA1069E

BL-100
< SERVICE INFORMATION >
AUTOMATIC BACK DOOR SYSTEM
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.
Pinch Strip System InspectionINFOID:0000000003532970
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.3 - Ground : Continuity should exist.
WIIA0602E
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

BL-104
< SERVICE INFORMATION >
AUTOMATIC BACK DOOR SYSTEM
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 InspectionINFOID:0000000003532975
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.
2.BACK DOOR HANDLE SWITCH CIRCUIT INSPECTION
1. Disconnect back door handle switch and back door control unit.
2. Check continuity between back door handle switch connector
D706 terminal 3 and back door control unit connector B55 termi-
nal 26.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
3.BACK DOOR HANDLE SWITCH GROUND INSPECTION
Check continuity between back door handle switch connector D706
terminal 4 and ground.
OK or NG
OK >> Replace the back door handle switch.
NG >> Repair or replace harness.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
3 - 26 : Continuity should exist.
WIIA0604E
4 - Ground : Continuity should exist.
WIIA0605E

BL-132
< SERVICE INFORMATION >
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
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 Man-
ual NATS-IVIS/NVIS”.
NG >> Check the following:
• Harness for open or short between security indicator lamp and BCM (NATS control unit).
• Indicator lamp condition
How to Replace NATS Antenna AmpINFOID:0000000003533001
NOTE:
•If NATS antenna amp. is not installed correctly, IVIS (NATS)
system will not operate properly and SELF-DIAG RESULTS on
CONSULT-II screen will show “LOCK MODE” or “CHAIN OF
IMMU-KEY”.
•Initialization is not necessary when only NATS antenna amp.
is replaced with a new one.8 - Ground :Battery voltage
LIIA1072E
23 - Ground :Battery voltage
LIIA0523E
SIIA1683E

BR-26
< SERVICE INFORMATION >
REAR DISC BRAKE
2. Install cylinder body and tighten bolts to specification. Refer to BR-24, "Exploded View" .
CAUTION:
Before installing cylinder body to the vehicle, wipe off mating surface of cylinder body.
3. Install brake hose to cylinder body and tighten union bolt to specification as necessary. Refer to BR-24,
"Exploded View".
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-8, "
Bleeding Brake System" .
5. Install tires to the vehicle. Refer to WT-7, "
Rotation" .
Brake CaliperINFOID:0000000003532747
DISASSEMBLY
1. Remove pads from cylinder body.
2. Remove sliding sleeve and boot from cylinder body.
3. Place a wooden block as shown, and blow air into union bolt
hole to remove piston and piston boot.
CAUTION:
Do not get your fingers caught in piston.
4. Using a suitable tool, remove piston seal from cylinder body as
shown.
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-10
.
• 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
BRD0041D
PFIA0269E

TROUBLE DIAGNOSIS
BRC-11
< SERVICE INFORMATION >[VDC/TCS/ABS]
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TROUBLE DIAGNOSIS
How to Perform Trouble Diagnosis for Quick and Accurate RepairINFOID:0000000003532776
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 malfunctions such as air leaks in the booster or lines, lack
of brake fluid, or other malfunctions with the brake system.
It is much more difficult to diagnose a malfunction that occurs inter-
mittently rather than continuously. Most intermittent malfunctions are
caused by poor electrical connections or wiring. In this case, careful
checking of suspicious circuits may help prevent the replacement of
good parts.
A visual check only may not find the cause of the malfunction, 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, especially for inter-
mittent malfunctions. 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” malfunctions first.
This is one of the best ways to troubleshoot brake malfunctions on
an ABS/TCS/VDC equipped vehicle. Also check related Service Bul-
letins for information.
SEF233G
SEF234G

TROUBLE DIAGNOSIS
BRC-27
< SERVICE INFORMATION >[VDC/TCS/ABS]
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3. Turn ignition switch ON.
4. Start engine and drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
5. After stopping the vehicle, with the engine running, touch “START (NISSAN BASED VHCL)”, “ABS”,
“SELF-DIAG RESULTS” in order on the CONSULT-II screen.
CAUTION:
If “START (NISSAN BASED VHCL)” is touched immediately after starting the engine or turning on
the ignition switch, “ABS” might not be displayed in the SELECT SYSTEM screen. In this case,
repeat the operation from step 1.
6. The self-diagnostic results are displayed. (If necessary, the self-diagnostic results can be printed out by
touching “PRINT”.)
• When “NO DTC IS DETECTED” is displayed, check the ABS warning lamp, SLIP indicator lamp and
VDC OFF indicator lamp.
7. Conduct the appropriate inspection from the display item list, and repair or replace the malfunctioning
component.
8. Start engine and drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
CAUTION:
• When a wheel sensor “short-circuit” is detected, if the vehicle is not driven at 30 km/h (19 MPH)
for at least 1 minute, the ABS warning lamp will not turn off even if the malfunction is repaired.
9. Turn ignition switch OFF to prepare for erasing the memory.
10. Start the engine and touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-DIAG RESULTS”, “ERASE”
in order on the CONSULT-II screen to erase the error memory.
If “ABS” is not indicated, go to GI-38, "
CONSULT-II Data Link Connector (DLC) Circuit".
CAUTION:
If the error memory is not erased, re-conduct the operation from step 5.
11. For the final inspection, drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute and
confirm that the ABS warning lamp, SLIP indicator lamp, and VDC OFF indicator lamp are off.
Display Item List
Self-diagnostic item Malfunction detecting condition Check system
FR LH SENSOR 1
[C1104]Circuit of front LH wheel sensor is open, shorted or sensor power
voltage is unusual.
BRC-34, "
Wheel Sensor
System Inspection"
(Note 1) RR RH SENSOR 1
[C1101]Circuit of rear RH wheel sensor is open, shorted or sensor power
voltage is unusual.
FR RH SENSOR 1
[C1103]Circuit of front RH wheel sensor is open, shorted or sensor power
voltage is unusual.
RR LH SENSOR 1
[C1102]Circuit of rear LH wheel sensor is open, shorted or sensor power
voltage is unusual.
FR LH SENSOR 2
[C1108]ABS actuator and electric unit (control unit) cannot identify sensor
pulses, because of large gap between wheel sensor and sensor
rotor.
RR RH SENSOR 2
[C1105]ABS actuator and electric unit (control unit) cannot identify sensor
pulses, because of large gap between wheel sensor and sensor
rotor.
FR RH SENSOR 2
[C1107]ABS actuator and electric unit (control unit) cannot identify sensor
pulses, because of large gap between wheel sensor and sensor
rotor.
RR LH SENSOR 2
[C1106]ABS actuator and electric unit (control unit) cannot identify sensor
pulses, because of large gap between wheel sensor and sensor
rotor.
ABS SENSOR
[ C 111 5 ]Wheel sensor input is abnormal.
STOP LAMP SW
[ C 111 6 ]Stop lamp switch or circuit malfunction.BRC-40, "
Stop Lamp
Switch System Inspec-
tion"