2001 INFINITI QX4 ignition

TCM TERMINALS AND REFERENCE VALUENBAT0185S01Remarks: Specification data are reference values.
Terminal
No.Wire color Item ConditionJudgement
standard
(Approx.)
10 W/R Power source
When turning ignition switch to ªONº.Battery volt-
age
When turning ignition switch to ªOFFº. 0V
19 W/R Power source Same as No. 10
25 B Ground
Ð0V
28 R/YPower source
(Memory back-up)
or
When turning ignition switch to ªOFFº.Battery volt-
age
When turning ignition switch to ªONº.Battery volt-
age
48 B Ground
Ð0V
Diagnostic ProcedureNBAT0223
1 CHECK TCM POWER SOURCE STEP 1
1. Turn ignition switch to ON position.
(Do not start engine.)
2. Check voltage between TCM terminals 10, 19, 28 and ground.
SAT611J
OK or NG
OK©GO TO 2.
NG©GO TO 3.
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TROUBLE DIAGNOSIS FOR POWER SUPPLY
Wiring Diagram Ð AT Ð MAIN (Cont'd)
AT-97

2 CHECK TCM POWER SOURCE STEP 2
1. Turn ignition switch to OFF position.
2. Check voltage between TCM terminal 28 and ground.
SAT612JC
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING ITEM
Check the following items:
IHarness for short or open between ignition switch and TCM terminals 10, 19 and 28 (Main harness)
IIgnition switch and 10A or 7.5A fuse [No. 18 or 24, located in the fuse block (J/B)]
Refer to EL-9, ªSchematicº.
OK or NG
OK©GO TO 4.
NG©Repair or replace damaged parts.
4 CHECK TCM GROUND CIRCUIT
1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.
3. Check continuity between TCM terminals 25, 48 and ground. Refer to wiring diagram Ð AT Ð MAIN.
Continuity should exist.
If OK, check harness for short to ground and short to power.
OK or NG
OK©INSPECTION END
NG©Repair open circuit or short to ground or short to power in harness or connectors.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Diagnostic Procedure (Cont'd)
AT-98

SAT014K
SAT020K
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0028S01CAUTION:
Always drive vehicle at a safe speed.
NOTE:
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.
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-II
1) Turn ignition switch ªONº.
2) Select ªDATA MONITORº mode for ªENGINEº with CONSULT-
II.
3) Start engine and maintain the following conditions for at least
5 consecutive seconds.
VHCL SPEED SE: 10 km/h (6 MPH) or more
THRTL POS SEN: More than 1.3V
Selector lever: D position (OD ªONº or ªOFFº)
With GST
Follow the procedure ªWith CONSULT-IIº.
DTC P0705 PARK/NEUTRAL POSITION SWITCH
Description (Cont'd)
AT-100

Diagnostic ProcedureNBAT0029
1 CHECK PNP SWITCH CIRCUIT (WITH CONSULT-II)
With CONSULT-II
1. Turn ignition switch to ªONº position.
(Do not start engine.)
2. Select ªTCM INPUT SIGNALSº in ªDATA MONITORº mode for ªA/Tº with CONSULT-II.
3. Read out ªPº, ªRº, ªNº, ªDº, ª2º and ª1º position switches moving selector lever to each position. Check the signal of the
selector lever position is indicated properly.
SAT643J
OK or NG
OK©GO TO 4.
NG©GO TO 3.
2 CHECK PNP SWITCH CIRCUIT (WITHOUT CONSULT-II)
Without CONSULT-II
1. Turn ignition switch to ªONº position.
(Do not start engine.)
2. Check voltage between TCM terminals 26, 27, 34, 35, 36 and ground while moving selector lever through each posi-
tion.
MTBL0205
SAT517J
Does battery voltage exist (B) or non-existent (0)?
Ye s©GO TO 4.
No©GO TO 3.
DTC P0705 PARK/NEUTRAL POSITION SWITCH
Diagnostic Procedure
AT-102

3 DETECT MALFUNCTIONING ITEM
Check the following items:
IPNP switch
Refer to ªComponent Inspectionº, AT-103.
IHarness for short or open between ignition switch and PNP switch (Main harness)
IHarness for short or open between PNP switch and TCM (Main harness)
IDiode (P, N position)
IIgnition switch and 10A fuse [No. 18, located in the fuse block (J/B)]
Refer to EL-9, ªSchematicº.
OK or NG
OK©GO TO 4.
NG©Repair or replace damaged parts.
4 CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-100.
OK or NG
OK©INSPECTION END
NG©GO TO 5.
5 CHECK TCM INSPECTION
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK©INSPECTION END
NG©Repair or replace damaged parts.
SAT517GB
SAT843BG
Component InspectionNBAT0030PARK/NEUTRAL POSITION SWITCHNBAT0030S021. Check continuity between terminals 1 and 2 and between ter-
minals 3 and 4, 5, 6, 7, 8, 9 while moving manual shaft through
each position.
Lever position Terminal No.
P 1-2 3-4
R 3-5
N 1-2 3-6
D 3-7
2 3-8
1 3-9
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DTC P0705 PARK/NEUTRAL POSITION SWITCH
Diagnostic Procedure (Cont'd)
AT-103

SAT014K
SAT020K
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0031S01CAUTION:
Always drive vehicle at a safe speed.
NOTE:
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.
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-II
1) Turn ignition switch ªONº and select ªDATA MONITORº mode
for ªENGINEº with CONSULT-II.
2) Start engine and maintain the following conditions for at least
10 minutes (Total). (It is not necessary to maintain continu-
ously.)
CMPS´RPM (REF): 450 rpm or more
VHCL SPEED SE: 10 km/h (6 MPH) or more
THRTL POS SEN: More than 1.2V
Selector lever: D position (OD ªONº)
With GST
Follow the procedure ªWith CONSULT-IIº.
DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT
Description (Cont'd)
AT-106

4 CHECK A/T FLUID TEMPERATURE SENSOR WITH TERMINAL CORD ASSEMBLY
1. Turn ignition switch to ªOFFº position.
2. Disconnect terminal cord assembly connector on the right side of transfer assmebly.
3. Check resistance between terminals 8 and 9 when A/T is cold [20ÉC (68ÉF)].
SAT697I
Is resistance approx. 2.5 kW?
Ye s©GO TO 7.
No©GO TO 5.
5 DETECT MALFUNCTIONING ITEM
1. Remove oil pan.
2. Check the following items:
IA/T fluid temperature sensor
Refer to ªComponent Inspectionº, AT-110.
IHarness of terminal cord assembly for short or open
OK or NG
OK©GO TO 7.
NG©Repair or replace damaged parts.
6 CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR (WITHOUT CONSULT-II)
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM terminal 47 and ground while warming up A/T.
Voltage:
Cold [20ÉC (68ÉF)]®Hot [80ÉC (176ÉF)]:
Approximately 1.5V®0.5V
SAT518J
OK or NG
OK©GO TO 4.
NG©GO TO 3.
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DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT
Diagnostic Procedure (Cont'd)
AT-109

SAT014K
SAT971J
SAT014K
SAT020K
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0034S01CAUTION:
IAlways drive vehicle at a safe speed.
IBe careful not to rev engine into the red zone on the
tachometer.
NOTE:
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.
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-II
1) Turn ignition switch ªONº and select ªDATA MONITORº mode
for ªA/Tº with CONSULT-II.
2) Drive vehicle and check for an increase of ªVHCL/S SE´MTRº
value.
If the check result is NG, go to ªDIAGNOSTIC PROCEDUREº,
AT-200.
If the check result is OK, go to following step.
3) Select ªDATA MONITORº mode for ªENGINEº with CONSULT-
II.
4) Start engine and maintain the following conditions for at least
5 consecutive seconds.
VHCL SPEED SE: 30 km/h (19 MPH) or more
THRTL POS SEN: More than 1.2V
Selector lever: D position (OD ªONº)
Driving pattern: Driving the vehicle uphill (increased engine
load) will help maintain the driving conditions required for this
test.
If the check result is NG, go to ªDIAGNOSTIC PROCEDUREº,
AT-114.
If the check result is OK, go to following step.
5) Maintain the following conditions for at least 5 consecutive
seconds.
CMPS´RPM (REF): 3,500 rpm or more
THRTL POS SEN: More than 1.2V
Selector lever: D position (OD ªONº)
Driving pattern: Driving the vehicle uphill (increased engine
load) will help maintain the driving conditions required for this
test.
With GST
Follow the procedure ªWith CONSULT-IIº.
DTC P0720 VEHICLE SPEED SENSOR´A/T (REVOLUTION SENSOR)
Description (Cont'd)
AT-112