brake sensor INFINITI FX35 2008 Repair Manual

DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTIONAT-153
< SERVICE INFORMATION >
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DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
DescriptionINFOID:0000000001327313
 Low coast brake solenoid valve is turned ON or OFF by the TCM in response to signals sent from the PNP
switch, vehicle speed sensor and accelerator pedal positi on sensor (throttle position sensor). Gears will then
be shifted to the optimum position.
 This is not only caused by electrical malfunction (cir cuits open or shorted) but also by mechanical malfunc-
tion such as control valve sticking, improper solenoid valve operation.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000001327314
On Board Diagnosis LogicINFOID:0000000001327315
Diagnostic trouble code “P1774 LC/B SOLENOID FNCT” with CONSULT-III or 7th judgement flicker without
CONSULT-III is detected under the following conditions.
 When TCM detects that actual gear ratio is irr egular, and relation between gear position and condition of
ATF pressure switch 2 is irregular during depressing accelerator pedal. (Other than during shift change)
 When TCM detects that relation between gear position and condition of ATF pressure switch 2 is irregular during releasing accelerator pedal. (Other than during shift change)
Possible CauseINFOID:0000000001327316
 Harness or connectors
(Solenoid and switch circuits are open or shorted.)
 Low coast brake solenoid valve
 ATF pressure switch 2
DTC Confirmation ProcedureINFOID:0000000001327317
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, alw ays turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Start engine.
2. Accelerate vehicle to maintain the following conditions. MANU MODE SW: ON
GEAR: “1” or “2” (LC/B ON/OFF)
3. Perform step “2” again.
4. Turn ignition switch OFF, then perform step “1” to “3” again.
5. Check “SELF-DIAG RESULTS” mode for “TRANS MISSION” with CONSULT-III. If DTC (P1774) is
detected, go to AT-153, "
Diagnosis Procedure".
If DTC (P1772) is detected, go to AT-151, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001327318
1.CHECK INPUT SIGNALS
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
.OFF
ATF PRES SW 2 Low coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
.OFF
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AT-154
< SERVICE INFORMATION >
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
With CONSULT-III
1. Start engine.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III.
3. Drive vehicle in the manual mode (1st or 2nd gear), and confirm the ON/OFF actuation of the “ATF PRES
SW 2” and “ON OFF SOL”.
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-160
.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT-215, "Control Valve with TCM and A/T Fluid Tem-
perature Sensor 2".
NG >> Repair or replace damaged parts.
4.CHECK DTC
Perform AT-153, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ON OFF SOL Low coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
.OFF
ATF PRES SW 2 Low coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
.OFF
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AT-278
< SERVICE INFORMATION >
DISASSEMBLY
47. Remove parking gear from output shaft.
48. Remove seal rings from output shaft.
49. Remove needle bearing from transmission case.
50. Remove revolution sensor from transmission case.CAUTION:
 Do not subject it to impact by dropping or hitting it.
 Do not disassemble.
 Do not allow metal filings, etc. to get on the sensor's front
edge magnetic area.
 Do not place in an area affected by magnetism.
51. Remove reverse brake snap ring (fixing plate) using 2 flat- bladed screwdrivers.
NOTE:
Press out snap ring from the transmission case oil pan side gap
using a flat-bladed screwdriver, and remove it using another
screwdriver.
52. Remove reverse brake retaining plate from transmission case. Check facing for burns, cracks or damage. If necessary,
replace the plate.
SCIA5247E
SCIA5209E
SCIA5031E
SCIA2320E
SCIA5032E
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AT-324
< SERVICE INFORMATION >
ASSEMBLY
5. Tighten oil pump mounting bolts to specified torque. Refer to AT-
249, "Component".
CAUTION:
Apply ATF to oil pump bushing.
6. Install O-ring to input clutch assembly. CAUTION:
 Do not reuse O-ring.
 Apply ATF to O-ring.
7. Install converter housing to transmission case, and then tighten converter housing mounting bolts (1) to the specified torque.
Refer to AT-249, "
Component".
 : Bolt (8)
CAUTION:
Do not reuse self-sealing bolt (2).
8. Make sure that brake band does not close turbine revolution sensor hole.
9. Install control valve with TCM.
a. Connect TCM connector and park/neutral position switch con- nector.
SCIA2300E
SCIA5011E
SCIA7985E
SCIA5034E
SCIA5449E
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AT-332
< SERVICE INFORMATION >
SERVICE DATA AND SPECIFICATIONS (SDS)
A/T Fluid Temperature Sensor
INFOID:0000000001327418
Turbine Revolution SensorINFOID:0000000001327419
Vehicle Speed Sensor A/T (Revolution Sensor)INFOID:0000000001327420
Reverse BrakeINFOID:0000000001327421
Total End PlayINFOID:0000000001327422
Name Condition CONSULT- III “DATA MONITOR” (Approx.) Resistance (Approx.)
A/T fluid temperature sensor 1 0
°C (32 °F) 3.3 V 15 k Ω
20 °C (68 °F) 2.7 V 6.5 k Ω
80 °C (176 °F) 0.9 V 0.9 k Ω
A/T fluid temperature sensor 2 0
°C (32 °F) 3.3 V 10 k Ω
20 °C (68 °F) 2.5 V 4 k Ω
80 °C (176 °F) 0.7 V 0.5 k Ω
Name Condition Data (Approx.)
Turbine revoluti on sensor 1 When running at 50 km/h (31 MPH) in 4th speed with the closed throttle po-
sition signal OFF.
1.3 kHz
Turbine revoluti on sensor 2 When moving at 20 km/h (12 MPH) in 1st speed with the closed throttle po-
sition signal OFF.
Name Condition Data (Approx.)
Revolution sensor When moving at 20 km/h (12 MPH). 185 Hz
Model code number 91X3A, 91X3B 96X1C
Number of drive plates 6
Number of driven plates 6
Clearance mm (in) Standard 0.7 - 1.1 (0.028 - 0.043)
Total end play mm (in) 0.25 - 0.55 (0.0098 - 0.0217)
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BL-100
< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
19 SB Outside antenna LH (+) OutputLOCKDriver door request signal opera-
tion (Switch: ON)
20 G/Y Outside antenna LH (-) Output
25 W/R Door request switch
(passenger side)
Input —Door request switch operation:
Press (ON)
0
Other than the above (OFF) 5
26 P/L Stop lamp switch Input — Brake pedal depressed (ON) 5
Brake pedal not depressed
(OFF)
0
27 L/W Ignition knob switch Input — Press ignition knob. 12
Return ignition knob to LOCK po-
sition.
0
28 W/B Door unlock sensor Input — Door is locking → unlock 5 → 0
29 GY Door request switch
(back door)
Input —Back door request switch opera-
tion: Press (ON)
0
Other than the above (OFF) 5
31 Y/B Steering lock unit
ground —— — 0
32 R/B Steering lock unit com-
munication Output LOCKPress ignition knob with Intelli-
gent Key inside vehicle.
Other than the above 5
35 LG Inside key antenna (+)
signal
(Dashboard) Output
LOCKAny door open
→ Close (Door
switch: ON → OFF)
Ignition knob switch: ON (press
ignition knob.)
36 PU Inside key antenna (-)
signal
(Dashboard) Output
37 G Outside antenna RH (+) Output
LOCKPassenger door request switch
operation (Switch: ON)
38 G/W Outside antenna RH (-) Output
Te r -
minal Wire
color Item Signal
Input/
output Condition
Voltage (V)(Approx.)
Ignition
knob po-
sition Operation or conditions
SIIA1910J
SIIA1911J
SIIA1910J
SIIA1910J
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INTELLIGENT KEY SYSTEMBL-105
< SERVICE INFORMATION >
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ACTIVE TEST
List of Operation Related PartsINFOID:0000000001327850
Parts marked with × are the parts related to operation.
Monitor item [OPERATION] Description
PUSH SWITCH [ON/OFF] Displays status (Ignition knob switch ON/i
gnition knob switch OFF) as judged from
ignition knob switch signal.
KEY SW [ON/OFF] Displays status (Key inserted: ON/Key removed: OFF) as judged by key switch.
DR REQ SW [ON/OFF] Displays status (Operable: ON/Non-operable: OFF) as judged from door request
switch (driver
side) signal.
AS REQ SW [ON/OFF] Displays status (Operable: ON/Non-operable: OFF) as judged from door request
switch (passenger side) signal.
BD/TR REQ SW [ON/OFF] Displays status (Operable: ON/Non-operable: OFF) as judged from door request
switch (back door) signal.
IGN SW [ON/OFF] Displays status (Ignition knob ON position: ON/Ignition knob OFF position: OFF) as
judged from ignition switch signal.
ACC SW [ON/OFF] Displays status (Ignition switch ACC position: ON/Ignition switch OFF position:
OFF) as judged from ignition switch signal.
DOOR STAT SW [ON/OFF] Displays status from door unlock sensor ON/OFF condition.
STOP LAMP SW [ON/OFF] Displays status (Brake pedal depress: ON/brake pedal not depress: OFF) as
judged from stop lamp switch signal.
P RANGE SW [ON/OFF] Displays status from park/neutral position switch ON/OFF condition.
BD OPEN SW [ON/OFF] Displays status (Back door open: ON/Back door closed: OFF) as judged from back
door opener switch signal.
Monitor item Description
DOOR LOCK/UNLOCK This test is able to check all door lock actuators lock/unlock operation. These actu-
ators lock when “ON” on CONSULT-III screen is touched.
OUTSIDE BUZZER This test is able to check Intelligent Key warning buzzer operation. The buzzer will
be activated on when “ON” on CONSULT-III screen is touched.
INSIDE BUZZER This test is able to check buzzer (built-in combination meter) operation. The buzzer
will be activated on when “ON” on CONSULT-III screen is touched.
INDICATOR This test is able to check warning lamp operation. The lamp will be turned on when
“ON” on CONSULT-III screen is touched.
Will not operate if there is a malfunction in
the area where there is a ×.
Intelligent Key
Key switch
Ignition knob switch ACC switch
Ignition switch
Door unlock sensor
Door switch
Door request switch
Inside key antenna
Out side key antenna
Intelligent Key warning buzzer Intelligent Key unit
CAN communication system
BCM
Combination meter
Steering lock unit
Stop lamp switch Detention switch
Passenger side select unlock relay
Door lock/unlock operation using Intelligent
Key remote controller button operation ×××××××
Door lock/unlock operation using door re-
quest switch operation ×××××××××
Selective door unlock function using door
request switch operation ××××××× ×
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BR-12
< SERVICE INFORMATION >
BRAKE MASTER CYLINDER
BRAKE MASTER CYLINDER
On-Board InspectionINFOID:0000000001327617
LEAK INSPECTION
 Check for leaking in a master cylinder installation surface, a reservoir tank installation surface, and brake
tube connections.
ComponentINFOID:0000000001327618
Removal and InstallationINFOID:0000000001327619
CAUTION:
Be careful not to splash brake fluid on painted areas; it way cause paint damage. If brake fluid is
splashed on painted surf aces of body, immediately wipe it off and them wash it away with water imme-
diately.
REMOVAL
1. Remove cowl top cover. Refer to EI-23.
2. Drain brake fluid. Refer to BR-8, "
Drain and Refill".
3. Remove harness connectors for fluid level sensor and pressure sensor.
4. Using a flare nut wrench, remove brak e tube from master cylinder assembly.
1. Reservoir cap 2. Strainer 3. Reservoir tank
4. Grommet 5. Cylinder body 6. Pin
7. Pressure sensor 8. Pressure sensor (Only ICC models)
Refer to GI-8, "
Component" and the followings for the symbols in the figure.
: Apply brake fluid.
PFIA0815E
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BR-18
< SERVICE INFORMATION >
FRONT DISC BRAKE
FRONT DISC BRAKE
On-Vehicle InspectionINFOID:0000000001327627
PAD WEAR INSPECTION
 Check the thickness from check hole on cylinder body. Use a scalefor inspection if necessary.
ComponentINFOID:0000000001327628
WARNING:
Clean dust on caliper and brake pad with a vacuum dust collector to minimize the hazard of airborne
particles or other materials.
CAUTION: Standard thickness : 11.0 mm (0.433 in)
Repair limit thickness : 2.0 mm (0.079 in)
MAA0439D
1. Brake hose 2. Union bolt 3. Copper washer
4. Cap 5. Bleed valve 6. Sliding pin bolt
7. Cylinder body 8. Piston seal 9. Piston
10. Piston boot 11. Torque member mounting bolt 12. Sliding pin
13. Sliding pin boot 14. Bushing 15. Torque member
16. Inner shim cover 17. Inner shim 18. Inner pad
19. Pad wear sensor 20. Pad retainer 21. Outer pad
22. Outer shim 23. Outer shim cover
Refer to
GI-8, "
Component" and the followings for the symbols in the figure.
1: Apply rubber grease.
2: Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease.
3: Apply polyglycol ether based lubricant.
: Apply brake fluid.
PFIA0809E
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BR-22
< SERVICE INFORMATION >
FRONT DISC BRAKE
2. Apply rubber grease to piston boot. Cover the piston end withpiston boot, and install cylinder side lip on piston boot properly
into groove on cylinder body.
CAUTION:
Do not reuse piston boot.
3. Apply brake fluid to piston, and press piston into cylinder body by hand to assemble piston side lip on piston boot properly into
groove on piston.
CAUTION:
Press piston evenly and vary the pressing point to prevent
cylinder inner wall from being rubbed.
4. Install sliding pins and sliding pin boots to torque member.
5. Install the torque member to the knuckle spindle and tighten the mounting bolts to the specified torque. Refer to BR-18, "
Compo-
nent".
CAUTION:
Before installing torque member to vehicle, wipe oil and
grease on the washer seats on steering knuckle and the
mounting surface of the torque member.
6. Install pad retainers to torque member.
7. After assembling shims and shim covers to pad, install it to torque member.
CAUTION:
Inner pad and outer pad have pad-return mechanism on the
upper side of the pad retainer. When installing pad, be sure to install pad return lever to pad wear
sensor securely as shown in the figure.
8. Install cylinder body, and tighten sliding pin bolt to specified torque. Refer to BR-18, "
Component".
9. Install a projection of brake hose metal fitting by aligning with protrusions on cylinder body, and then tighten union bolts to specified torque. Refer to BR-10, "
Hydraulic Circuit".
CAUTION:
 Assemble brake hose securely to protrusions on cylinder body.
 Do not reuse copper washer for union bolts.
10. After installing caliper assembly, refill with new brake fluid and bleed air. Refer to BR-8, "
Bleeding Brake
System".
DISC ROTOR INSPECTION
Visual Inspection
Check surface of disc rotor for uneven wear, cracks, and serious damage. If any of them is detected, replace
applicable part.
Runout Inspection
1. Using wheel nuts, fix disc rotor to wheels hub. (2 or more positions)
SFIA2432E
SFIA2279E
SBR557E
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