brake fluid INFINITI QX4 2005 Factory Workshop Manual

DTC P1841 ATF PRESSURE SWITCH 1
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Diagnostic ProcedureECS00CJA
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode for “A/T” with CONSULT-II.
3. Drive vehicle in the “D” position (3rd

4th gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 1”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT-168, "
MAIN POWER SUPPLY AND GROUND CIR-
CUIT" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. DETECT MALFUNCTIONING ITEM
Check the following items:

The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT - 2 3 1 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT- 1 6 0 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ATF PRES
SW 1Front brake engaged. Refer to AT- 1 9
.ON
Front brake disengaged. Refer to AT - 1 9
.OFF
PCIA0067E

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-183
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3. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 3 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-231, "
Control Valve With TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 1 3 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 5.
NG >> Check the malfunction items. If any items are damaged,
repair or replace damaged parts. Refer to AT-60, "
Symp-
tom Chart" (Symptom No.60).
5. CHECK SYMPTOM
Check again. Refer to AT- 5 4 , "
Check at Idle" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
6. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT-82, "
TCM Input/Output Signal Reference Val-
ues" .
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Large Shock (“N” to “D” Position)ECS00CK7
SYMPTOM:
A noticeable shock occurs when the selector lever is shifted from the “N” to “D” position.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 8 5 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate A/T fluid temperature sensor, engine speed signal, accelerator pedal
position sensor, ATF pressure switch 1, front brake solenoid valve, CAN communication line?
YES >> Check the malfunctioning system. Refer to AT-126, "DTC P1710 A/T FLUID TEMPERATURE
SENSOR CIRCUIT" , AT- 11 3 , "DTC P0725 ENGINE SPEED SIGNAL" ., AT- 1 2 3 , "DTC P1705
SAT6 3 8A
SCIA5199E

AT-184
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
THROTTLE POSITION SENSOR" , AT-160, "DTC P1841 ATF PRESSURE SWITCH 1" , AT-144,
"DTC P1757 FRONT BRAKE SOLENOID VALVE" , AT - 9 5 , "DTC U1000 CAN COMMUNICATION
LINE" .
NO >> GO TO 2.
2. ENGINE IDLE SPEED
Check the engine idle speed. Refer to EC-77, "
Idle Speed and Ignition Timing Check" .
OK or NG
OK >> GO TO 3.
NG >> Repair.
3. CHECK CONTROL CABLE
Check the control cable.

Refer to AT-228, "Checking of A/T Position" .
OK or NG
OK >> GO TO 4.
NG >> Adjust control cable. Refer to AT-228, "
Adjustment of A/
T Position" .
4. CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to AT-13, "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 5.
NG >> Refill ATF.
5. CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “D” position. Refer
to AT - 5 1 , "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 8.
NG - 1 >> Line pressure high: GO TO 6.
NG - 2 >> Line pressure low: GO TO 7.
LCIA0345E
SAT6 3 8A
SAT4 9 4G

AT-188
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
5. DETECT MALFUNCTIONING ITEM
1. Disassemble A/T. Refer to AT-262, "
Disassembly" .
2. Check the following items:
–Reverse brake. Refer to AT-262, "Disassembly" .
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
6. CHECK LINE PRESSURE
Check the line pressure with the engine idling. Refer to AT- 5 1 , "
LINE
PRESSURE TEST" .
OK or NG
OK >> GO TO 9.
NG - 1 >> Line pressure high. GO TO 7.
NG - 2 >> Line pressure low. GO TO 8.
7. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 3 1 , "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT-262, "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT-280, "Oil Pump" .
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
8. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 3 1 , "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT-262, "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT-280, "Oil Pump" .
–Power train system. Refer to AT-262, "Disassembly" .
–Transmission case. Refer to AT-262, "Disassembly" .
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
SAT4 9 4G

AT-202
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: October 20052005 QX56
A/T Does Not Shift: D4 → D5ECS00CKE
SYMPTOM:

The vehicle does not shift-up from the D4 to D5 gear at the specified speed.

The vehicle does not shift-up from the D4 to D5 gear unless A/T is warmed up.
DIAGNOSTIC PROCEDURE
1. CONFIRM THE SYMPTOM
Check if vehicle creeps forward in “D” position and vehicle can be started from D
1.
OK or NG
OK >> GO TO 2.
NG >> Refer to AT-190, "
Vehicle Does Not Creep Forward In “D” Position" , AT-192, "Vehicle Cannot Be
Started From D1" .
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 8 5 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate ATF pressure switch 1, ATF pressure switch 5, front brake solenoid
valve, direct clutch solenoid valve, accelerator pedal position sensor, turbine revolution sensor, vehicle speed
sensor A/T (revolution sensor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT- 1 6 0 , "DTC P1841 ATF PRESSURE SWITCH 1" ,
AT-164, "
DTC P1845 ATF PRESSURE SWITCH 5" , AT-144, "DTC P1757 FRONT BRAKE
SOLENOID VALVE" , AT-148, "DTC P1762 DIRECT CLUTCH SOLENOID VALVE" , AT-123,
"DTC P1705 THROTTLE POSITION SENSOR" , AT-131, "DTC P1716 TURBINE REVOLUTION
SENSOR" , AT-108, "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)" ,
AT-133, "
DTC P1721 VEHICLE SPEED SENSOR MTR" .
NO >> GO TO 3.
3. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-13, "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4. CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT- 5 1 , "
LINE
PRESSURE TEST" .
OK or NG
OK >> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.
SAT6 3 8A
SAT4 9 4G

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Engine Speed Does Not Return to IdleECS00CKI
SYMPTOM:
When a shift-down is performed, the engine speed does not smoothly return to the idling speed.
DIAGNOSTIC PROCEDURE
1. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 3 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 2.
NG >> Refill ATF.
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 8 5 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate front brake solenoid valve, direct clutch solenoid valve, ATF pressure
switch 1, ATF pressure switch 5, accelerator pedal position sensor, vehicle speed sensor A/T (revolution sen-
sor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT- 1 4 4 , "DTC P1757 FRONT BRAKE SOLENOID
VA LV E" , AT-148, "DTC P1762 DIRECT CLUTCH SOLENOID VALVE" , AT-160, "DTC P1841 ATF
PRESSURE SWITCH 1" , AT-164, "DTC P1845 ATF PRESSURE SWITCH 5" , AT-123, "DTC
P1705 THROTTLE POSITION SENSOR" , AT-108, "DTC P0720 VEHICLE SPEED SENSOR A/T
(REVOLUTION SENSOR)" , AT- 1 3 3 , "DTC P1721 VEHICLE SPEED SENSOR MTR" .
NO >> GO TO 3.
3. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-231, "
Control Valve With TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 0 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 7.
4. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-60,
"Symptom Chart" (Symptom No.65).
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
SAT6 3 8A
SCIA5199E

ASSEMBLY
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5. Tighten oil pump bolts to specified torque. Refer to AT-250,
"Components" .
CAUTION:
Apply ATF to oil pump bushing.
6. Install new O-ring to input clutch assembly.
CAUTION:

Do not reuse O-ring.

Apply ATF to O-ring.
7. Install converter housing to transmission case.
CAUTION:
Do not reuse self-sealing bolt.
8. Make sure that brake band does not close turbine revolution
sensor hole.
9. Install control valve with TCM.
a. Install A/T fluid temperature sensor 2 to bracket.
SCIA2300E
SCIA5 011 E
Converter housing
bolt: 52 N·m (5.3 kg-m, 38 ft-lb)
Self-sealing bolt : 61 N·m (6.2 kg-m, 45 ft-lb)
SCIA5171E
SCIA5034E
SCIA5264E

BR-1
BRAKE SYSTEM
F BRAKES
CONTENTS
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SECTION BR
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Revision: October 20052005 QX56 PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for Brake System .................................. 3
PREPARATION ........................................................... 4
Commercial Service Tools ........................................ 4
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 5
NVH Troubleshooting Chart ..................................... 5
BRAKE PEDAL .......................................................... 6
Inspection and Adjustment ....................................... 6
INSPECTION ........................................................ 6
ADJUSTMENT ...................................................... 6
Removal and Installation .......................................... 7
REMOVAL ............................................................. 8
INSPECTION AFTER REMOVAL ......................... 8
INSTALLATION ..................................................... 8
BRAKE FLUID ............................................................ 9
On-board Inspection ................................................. 9
LEVEL CHECK ..................................................... 9
Drain and Refill ......................................................... 9
Bleeding Brake System .......................................... 10
BRAKE PIPING AND HOSE .....................................11
Hydraulic Circuit ......................................................11
Removal and Installation of Front Brake Hose ........11
REMOVAL ............................................................11
INSTALLATION ................................................... 12
Removal and Installation of Rear Brake Hose ....... 12
REMOVAL ........................................................... 12
INSTALLATION ................................................... 12
Inspection After Installation .................................... 13
BRAKE MASTER CYLINDER .................................. 14
On-board Inspection ............................................... 14
LEAK INSPECTION ............................................ 14
Removal and Installation ........................................ 14
REMOVAL ........................................................... 14INSTALLATION ................................................... 15
Disassembly and Assembly .................................... 15
DISASSEMBLY ................................................... 15
ASSEMBLY ......................................................... 15
BRAKE BOOSTER ................................................... 16
On-Vehicle Service ................................................. 16
OPERATING CHECK .......................................... 16
AIRTIGHT CHECK .............................................. 16
Removal and Installation ........................................ 17
REMOVAL ........................................................... 17
INSTALLATION ................................................... 17
VACUUM LINES ....................................................... 19
Removal and Installation ........................................ 19
Inspection ............................................................... 19
VISUAL INSPECTION ......................................... 19
CHECK VALVE INSPECTION ............................. 19
FRONT DISC BRAKE ............................................... 20
On-vehicle Inspection ............................................. 20
PAD WEAR INSPECTION ................................... 20
Components ........................................................... 20
Removal and Installation of Brake Pad .................. 21
REMOVAL ........................................................... 21
INSTALLATION ................................................... 21
Removal and Installation of Brake Caliper Assembly
and Disc Rotor ........................................................ 21
REMOVAL ........................................................... 21
INSTALLATION ................................................... 21
Disassembly and Assembly of Brake Caliper
Assembly ................................................................ 22
DISASSEMBLY ................................................... 22
CALIPER INSPECTION ...................................... 23
ASSEMBLY ......................................................... 23
DISC ROTOR INSPECTION ............................... 24
BRAKE BURNISHING PROCEDURE ................. 24
REAR DISC BRAKE ................................................. 26
On-vehicle Inspection ............................................. 26
PAD WEAR INSPECTION ................................... 26
Components ........................................................... 26
Removal and Installation of Brake Pad .................. 27
REMOVAL ........................................................... 27

PRECAUTIONS
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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.
WA RN ING:

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-24, "
BRAKE BURNISHING PROCEDURE" .
WA RN ING:

Clean brake pads and shoes with a waste cloth, then wipe
with a dust collector.SBR6 86 C

BRAKE FLUID
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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-10, "
Bleeding Brake
System" .
LFIA0225E
SBR4 19 C
SBR9 95