brake INFINITI QX4 2001 Factory Workshop Manual

6 DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to ªON-VEHICLE SERVICEº, AT-273.
2. Check the following items:
IValves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)
ILine pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
IOil pump assembly
ITorque converter
IReverse clutch assembly
IHigh clutch assembly
ILow & reverse brake assembly
ILow one-way clutch
©Repair or replace damaged parts.GI
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TROUBLE DIAGNOSES FOR SYMPTOMS
6. Vehicle Does Not Creep Backward In ªRº Position (Cont'd)
AT-229

6 DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to ªON-VEHICLE SERVICEº, AT-273.
2. Check the following items:
IValves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)
ILine pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
IOil pump assembly
IForward clutch assembly
IForward one-way clutch
ILow one-way clutch
ILow & reverse brake assembly
ITorque converter
©Repair or replace damaged parts.
TROUBLE DIAGNOSES FOR SYMPTOMS
7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position (Cont'd)
AT-232

7 CHECK SYMPTOM
Check again.
OK or NG
OK©INSPECTION END
NG©1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-
nector.
8 DETECT MALFUNCTIONING ITEM
1. Remove control valve. Refer to AT-273.
2. Check the following items:
IShift valve A
IShift solenoid valve A
IPilot valve
IPilot filter
3. Disassemble A/T.
4. Check the following items:
IServo piston assembly
IBrake band
IOil pump assembly
OK or NG
OK©GO TO 7.
NG©Repair or replace damaged parts.
TROUBLE DIAGNOSES FOR SYMPTOMS
9. A/T Does Not Shift: D1®D2Or Does Not Kickdown: D4®D2(Cont'd)
AT-238

6 CHECK SYMPTOM
Check again.
OK or NG
OK©INSPECTION END
NG©1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-
nector.
7 DETECT MALFUNCTIONING ITEM
1. Remove control valve Assembly. Refer to AT-273.
2. Check the following items:
IShift valve B
IOverrun clutch control valve
IShift solenoid valve B
IPilot valve
IPilot filter
3. Disassemble A/T.
4. Check the following items:
IServo piston assembly
IBrake band
ITorque converter
IOil pump assembly
OK or NG
OK©GO TO 6.
NG©Repair or replace damaged parts.
TROUBLE DIAGNOSES FOR SYMPTOMS
11. A/T Does Not Shift: D3®D4(Cont'd)
AT-244

15. Engine Speed Does Not Return To Idle
(Light Braking D
4®D3)=NBAT0087SYMPTOM:
IEngine speed does not smoothly return to idle when A/T
shifts from D
4to D3.
IVehicle does not decelerate by engine brake when turning
overdrive control switch OFF.
IVehicle does not decelerate by engine brake when shifting
A/T from ªDº to ª2º position.
1 CHECK SELF-DIAGNOSTIC RESULTS
Does self-diagnosis show damage to overrun clutch solenoid valve circuit after cruise test?
SAT583I
YesorNo
Ye s©Check overrun clutch solenoid valve circuit. Refer to ªDTC P1760º, AT-185.
No©GO TO 2.
2 CHECK THROTTLE POSITION SENSOR
Check throttle position sensor. Refer to EC-174, ªDescriptionº.
SAT142K
OK or NG
OK©GO TO 3.
NG©Repair or replace throttle position sensor.
TROUBLE DIAGNOSES FOR SYMPTOMS
15. Engine Speed Does Not Return To Idle (Light Braking D4®D3)
AT-250

20. Vehicle Does Not Decelerate By Engine
Brake
NBAT0092SYMPTOM:
Vehicle does not decelerate by engine brake when shifting
from 2
2(12)to11.
1 CHECK SYMPTOM
Is ª6. Vehicle Does Not Creep Backward In ªRº Positionº OK?
YesorNo
Ye s©Go to ª15. Engine Speed Does Not Return To Idle (Light Braking D
4,D3)º, AT-250.
No©Go to ª6. Vehicle Does Not Creep Backward In ªRº Positionº, AT-227.
TROUBLE DIAGNOSES FOR SYMPTOMS
20. Vehicle Does Not Decelerate By Engine Brake
AT-256

DescriptionNBAT0093IThe mechanical key interlock mechanism also operates as a
shift lock:
With the key switch turned to ªONº, the selector lever cannot
be shifted from ªPº (parking) to any other position unless the
brake pedal is depressed.
With the key removed, the selector lever cannot be shifted
from ªPº to any other position.
The key cannot be removed unless the selector lever is placed
in ªPº.
IThe shift lock and key interlock mechanisms are controlled by
the ON-OFF operation of the shift lock solenoid and by the
operation of the rotator and slider located inside the key
cylinder, respectively.
SAT145K
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A/T SHIFT LOCK SYSTEM
Description
AT-265

Diagnostic ProcedureNBAT0095SYMPTOM 1:
ISelector lever cannot be moved from ªPº position with key
in ªONº position and brake pedal applied.
ISelector lever can be moved from ªPº position with key in
ªONº position and brake pedal released.
ISelector lever can be moved from ªPº position when key
is removed from key cylinder.
SYMPTOM 2:
Ignition key cannot be removed when selector lever is set to
ªPº position. It can be removed when selector lever is set to
any position except ªPº.
1 CHECK KEY INTERLOCK CABLE
Check key interlock cable for damage.
OK or NG
OK©GO TO 2.
NG©Repair key interlock cable. Refer to ªKey Interlock Cableº, AT-271.
2 CHECK SELECTOR LEVER POSITION
Check selector lever position for damage.
OK or NG
OK©GO TO 3.
NG©Check selector lever. Refer to ªON-VEHICLE SERVICE Ð PNP Switch and Manual Con-
trol Linkage Adjustmentº, AT-276 and AT-276.
3 CHECK POWER SOURCE
1. Turn ignition switch to ON position. (Do not start engine.)
2. Check voltage between A/T device harness terminal 5 and ground.
SAT758JA
OK or NG
OK©GO TO 5.
NG©GO TO 4.
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A/T SHIFT LOCK SYSTEM
Diagnostic Procedure
AT-267

4 DETECT MALFUNCTIONING ITEM
Check the following items:
1. Harness for short or open between ignition switch and A/T device harness terminal 5
2. 7.5A fuse [No. 11, located in the fuse block (J/B)]
3. Ignition switch (Refer to EL-9, ªSchematicº.)
OK or NG
OK©GO TO 5.
NG©Repair or replace damaged parts.
5 CHECK INPUT SIGNAL A/T DEVICE
Turn ignition switch to OFF position.
ICheck voltage between A/T device harness terminal 7 and ground.
SAT179K
OK or NG
OK©GO TO 7.
NG©GO TO 6.
6 DETECT MALFUNCTIONING ITEM
Check the following items:
1. Harness for short or open between battery and stop lamp switch harness connector 1
2. Harness for short or open between stop lamp switch harness connector 2 and A/T device harness connector 7
3. Diode
4. 10A fuse [No. 14, located in the fuse block (J/B)]
5. Stop lamp switch
a. Check continuity between terminals 1 and 2.
SAT146K
Check stop lamp switch after adjusting brake pedal Ð refer to BR-14, ªAdjustmentº.
OK or NG
OK©GO TO 7.
NG©Repair or replace damaged parts.
A/T SHIFT LOCK SYSTEM
Diagnostic Procedure (Cont'd)
AT-268

SAT017B
IWhen connecting torque converter to transmission, measure
distance ªAº to be certain that they are correctly assembled.
Distance ªAº:
25.0 mm (0.984 in) or more
SAT148K
IInstall converter to drive plate.
IAfter converter is installed to drive plate, rotate crankshaft
several turns and check to be sure that transmission
rotates freely without binding.
SAT149K
ITighten bolts securing transmission.
Bolt No.Tightening torque
N´m (kg-m, ft-lb)Bolt length ªº
mm (in)
1 70 - 80 (7.1 - 8.2, 52 - 59) 65 (2.56)
2 70 - 80 (7.1 - 8.2, 52 - 59) 55 (2.17)
3 29 - 39 (3.0 - 4.0, 22 - 29) 40 (1.57)
IReinstall any part removed.
SAT638A
ICheck fluid level in transmission.
IMove selector lever through all positions to be sure that trans-
mission operates correctly.
With parking brake applied, rotate engine at idling. Move selec-
tor lever through ªNº to ªDº, to ª2º, to ª1º and to ªRº positions.
A slight shock should be felt by hand gripping selector each
time transmission is shifted.
IPerform road test. Refer to ªROAD TESTº, AT-63.
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REMOVAL AND INSTALLATION
Installation (Cont'd)
AT-279