elec INFINITI QX4 2001 Factory Manual Online

SAT574J
DescriptionNBAT0215The TCM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the A/T.
ON BOARD DIAGNOSIS LOGICNBAT0215S01
Diagnostic trouble code Malfunction is detected when ... Check item (Possible cause)
: CONT UNIT (EEP ROM)TCM memory (EEP ROM) is malfunc-
tioning.TCM
SAT014K
SAT971J
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0215S02NOTE:
If ªDIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DUREº has been previously conducted, always turn ignition
switch ªOFFº and wait at least 5 seconds before conducting
the next test.
With CONSULT-II
1) Turn ignition switch ªONº and select ªDATA MONITORº mode
for A/T with CONSULT-II.
2) Start engine.
3) Run engine for at least 2 seconds at idle speed.
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DTC CONTROL UNIT (EEP ROM)
Description
AT-213

Diagnostic Procedure=NBAT0216
1 CHECK DTC
With CONSULT-II
1. Turn ignition switch ªONº and select ªSELF DIAG RESULTSº mode for A/T with CONSULT-II.
2. Move selector lever to ªRº position.
3. Depress accelerator pedal (Full throttle position).
4. Touch ªERASEº.
5. Turn ignition switch ªOFFº position for 10 seconds.
PERFORM DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE.
See previous page.
Is the ªCONTROL UNIT (EEP ROM)º displayed again?
Ye s©Replace TCM.
No©INSPECTION END
DTC CONTROL UNIT (EEP ROM)
Diagnostic Procedure
AT-214

2. Engine Cannot Be Started In ªPº and ªNº
Position
=NBAT0074SYMPTOM:
Engine cannot be started with selector lever in ªPº or ªNº
position.
Engine cannot be started with selector lever in ªPºEngine can
be started with selector lever in ªDº, ª2º, ª1º or ªRº position.
1 CHECK PNP SWITCH CIRCUIT
With CONSULT-II
Does ªTCM INPUT SIGNALSº in Data Monitor show damage to PNP switch circuit?
Without CONSULT-II
Does self-diagnosis show damage to PNP switch circuit?
SAT367J
YesorNo
Ye s©Check PNP switch circuit. Refer to ªDTC P0705º, AT-99.
No©GO TO 2.
2 CHECK PNP SWITCH INSPECTION
Check for short or open of PNP switch 2-pin connector. Refer to ªComponents Inspectionº, AT-103.
SAT838BB
OK or NG
OK©GO TO 3.
NG©Repair or replace PNP switch.
3 CHECK STARTING SYSTEM
Check starting system. Refer to SC-10, ªSystem Descriptionº.
OK or NG
OK©INSPECTION END
NG©Repair or replace damaged parts.
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TROUBLE DIAGNOSES FOR SYMPTOMS
2. Engine Cannot Be Started In ªPº and ªNº Position
AT-221

3. In ªPº Position, Vehicle Moves Forward Or
Backward When Pushed
=NBAT0075SYMPTOM:
Vehicle moves when it is pushed forward or backward with
selector lever in ªPº position.
1 CHECK PARKING COMPONENTS
Check parking components.
Refer to ªParking Pawl Componentsº, AT-337.
SAT133B
OK or NG
OK©INSPECTION END
NG©Repair or replace damaged parts.
TROUBLE DIAGNOSES FOR SYMPTOMS
3. In ªPº Position, Vehicle Moves Forward Or Backward When Pushed
AT-222

4. In ªNº Position, Vehicle Moves=NBAT0076SYMPTOM:
Vehicle moves forward or backward when selecting ªNº posi-
tion.
1 CHECK PNP SWITCH CIRCUIT
With CONSULT-II
Does ªTCM INPUT SIGNALSº in Data Monitor show damage to PNP switch circuit?
Without CONSULT-II
Does self-diagnosis show damage to PNP switch circuit?
SAT367J
YesorNo
Ye s©Check PNP switch circuit. Refer to ªDTC P0705º, AT-99.
No©GO TO 2.
2 CHECK CONTROL LINKAGE
Check control linkage. Refer to AT-276.
SAT032G
OK or NG
OK©GO TO 3.
NG©Adjust control linkage. Refer to AT-276.
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TROUBLE DIAGNOSES FOR SYMPTOMS
4. In ªNº Position, Vehicle Moves
AT-223

3 CHECK LINE PRESSURE
Check line pressure at idle with selector lever in ªDº position. Refer to ªLINE PRESSURE TESTº, AT-62.
SAT494G
OK or NG
OK©GO TO 4.
NG©1. Remove control valve assembly. Refer to 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
4 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.
TROUBLE DIAGNOSES FOR SYMPTOMS
5. Large Shock. ªNº®ªRº Position (Cont'd)
AT-226

6. Vehicle Does Not Creep Backward In ªRº
Position
=NBAT0078SYMPTOM:
Vehicle does not creep backward when selecting ªRº position.
1 CHECK A/T FLUID LEVEL
Check A/T fluid level again.
SAT638A
OK or NG
OK©GO TO 2.
NG©Refill ATF.
2 CHECK STALL TEST
Check stall revolution with selector lever in ª1º and ªRº positions.
Refer to AT-356.
SAT493G
OK or NG
OK©GO TO 3.
OK in ª1º position, NG in
ªRº position©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
NG in both ª1º and ªRº
positions©GO TO 6.
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TROUBLE DIAGNOSES FOR SYMPTOMS
6. Vehicle Does Not Creep Backward In ªRº Position
AT-227

3 CHECK LINE PRESSURE
Check line pressure at idle with selector lever in ªRº position. Refer to ªLINE PRESSURE TESTº, AT-62.
SAT494G
OK or NG
OK©GO TO 4.
NG©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
4 CHECK A/T FLUID CONDITION
1. Remove oil pan.
2. Check A/T fluid condition.
SAT171B
OK or NG
OK©GO TO 5.
NG©GO TO 6.
5 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.
TROUBLE DIAGNOSES FOR SYMPTOMS
6. Vehicle Does Not Creep Backward In ªRº Position (Cont'd)
AT-228

7. Vehicle Does Not Creep Forward In ªDº, ª2º
Or ª1º Position
=NBAT0079SYMPTOM:
Vehicle does not creep forward when selecting ªDº, ª2º or ª1º
position.
1 CHECK A/T FLUID LEVEL
Check A/T fluid level again.
SAT638A
OK or NG
OK©GO TO 2.
NG©Refill ATF.
2 CHECK STALL TEST
Check stall revolution with selector lever in ªDº position.
Refer to ªSTALL TESTº, AT-59.
SAT493G
OK or NG
OK©GO TO 3.
NG©GO TO 6.
TROUBLE DIAGNOSES FOR SYMPTOMS
7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position
AT-230

3 CHECK LINE PRESSURE
Check line pressure at idle with selector lever in ªRº position.
Refer to ªLINE PRESSURE TESTº, AT-62.
SAT494G
OK or NG
OK©GO TO 4.
NG©1. Remove control valve assembly.
Refer to 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
4 CHECK A/T FLUID CONDITION
1. Remove oil pan.
2. Check A/T fluid condition.
SAT171B
OK or NG
OK©GO TO 5.
NG©GO TO 6.
5 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.
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TROUBLE DIAGNOSES FOR SYMPTOMS
7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position (Cont'd)
AT-231