Ac system INFINITI QX4 2001 Factory Workshop Manual

SAT132K
Component InspectionNBAT0205THROTTLE POSITION SWITCHNBAT0205S01Closed Throttle Position Switch (Idle position)NBAT0205S0101ICheck continuity between terminals 5 and 6.
[Refer to ªPreparationº, ªTCM SELF-DIAGNOSTIC PROCE-
DURE (No Tools)º, AT-46.]
Accelerator pedal condition Continuity
Released Yes
Depressed No
ITo adjust closed throttle position switch, refer to EC-154, ªSystem
Descriptionº.
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Wide Open Throttle Position SwitchNBAT0205S0102ICheck continuity between terminals 4 and 5.
Accelerator pedal condition Continuity
Released No
Depressed Yes
DTC P1705 THROTTLE POSITION SENSOR
Component Inspection
AT-184

Diagnostic ProcedureNBAT0230
1 CHECK CIRCUIT BETWEEN TCM AND ECM
1. Turn ignition switch to OFF position.
2. Check continuity between TCM terminal 33 and ECM terminal 114.
SAT640JA
OK or NG
OK©GO TO 2.
NG©Repair or replace harness and connector between TCM and ECM.
2 CHECK DTC WITH ECM STEP 1
Perform self-diagnosis for engine control. Refer to EC-74, ªDESCRIPTIONº.
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 CHECK DTC WITH ECM STEP 2
Check ECM. Refer to EC-440 and EC-603, ªSystem Descriptionº and ªComponent Descriptionº.
OK or NG
OK©GO TO 4.
NG©Repair or replace damaged parts.
4 CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-208.
OK or NG
OK©INSPECTION END
NG©GO TO 5.
5 CHECK TCM INSPECTION
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.
DTC A/T COMMUNICATION LINE
Diagnostic Procedure
AT-210

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

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Throttle Position SwitchNBAT0204S0403Closed Throttle Position Switch (Idle Position)
ICheck continuity between terminals 5 and 6.
[Refer to ªPreparationº, ªTCM SELF-DIAGNOSTIC PROCE-
DURE (No Tools)º, AT-46.]
Accelerator pedal condition Continuity
Released Yes
Depressed No
ITo adjust closed throttle position switch, refer to EC-431, ªSystem
Descriptionº.
SAT137K
Wide Open Throttle Position Switch
ICheck continuity between terminals 4 and 5.
Accelerator pedal condition Continuity
Released No
Depressed Yes
SAT251JA
A/T Fluid Temperature SwitchNBAT0204S04041. Make sure the A/T fluid warning lamp lights when the key is
inserted and turned to ªONº.
2. Make sure the A/T fluid warning lamp goes off when turning the
ignition switch to ªONº.
3. Check resistance between terminal 10 and ground while
changing temperature as shown at left.
Temperature ÉC (ÉF) Resistance
140 (284) or more Yes
140 (284) or less No
TROUBLE DIAGNOSES FOR SYMPTOMS
21. TCM Self-diagnosis Does Not Activate (PNP, Overdrive Control and Throttle Position Switches Circuit Checks) (Cont'd)
AT-264

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

Wiring Diagram Ð SHIFT ÐNBAT0094
MAT921A
A/T SHIFT LOCK SYSTEM
Wiring Diagram Ð SHIFT Ð
AT-266

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

7 CHECK GROUND CIRCUIT
1. Turn ignition switch to OFF position.
2. Disconnect A/T device harness connector.
3. Check continuity between A/T device harness terminal 6 and ground. Refer to wiring diagram Ð SHIFT Ð.
Continuity should exist.
If OK, check harness for short to ground and short to power.
OK or NG
OK©GO TO 8.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
8 CHECK RELAY CIRCUIT
1. Turn ignition switch to ON and OFF position.
ICheck continuity between terminals 1, 2, 3 and 5.
SAT775J
YesorNo
Ye s©GO TO 9.
No©Replace relay.
9 CHECK PARK POSITION SWITCH
ICheck continuity between A/T device harness terminal 6 and relay (park position switch) harness terminal 1.
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OK or NG
OK©GO TO 10.
NG©Replace park position switch.
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A/T SHIFT LOCK SYSTEM
Diagnostic Procedure (Cont'd)
AT-269

10 CHECK SHIFT LOCK SOLENOID
ICheck operation by applying battery voltage shift lock solenoid harness terminals 1 and 3.
SAT762J
OK or NG
OK©GO TO 11.
NG©Replace shift lock solenoid.
11 CHECK SHIFT LOCK OPERATION
1. Reconnect shift lock harness connector.
2. Turn ignition switch from OFF to ON position. (Do not start engine.)
3. Recheck shift lock operation.
OK or NG
OK©INSPECTION END
NG©GO TO 12.
12 CHECK A/T DEVICE INSPECTION
1. Perform A/T device input/output signal inspection test.
2. If NG, recheck harness connector connection.
OK or NG
OK©INSPECTION END
NG©Repair or replace damaged parts.
A/T SHIFT LOCK SYSTEM
Diagnostic Procedure (Cont'd)
AT-270