2005 INFINITI FX35 Service Manual

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Page 209 of 4731

INFINITI FX35 2005 Service Manual AT-126
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Revision: 2005 July 2005 FX
Diagnostic ProcedureACS002N5
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON. (Do not start en

Page 210 of 4731

INFINITI FX35 2005 Service Manual DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) AT-127
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Revision: 2005 July 2005 FX
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)PFP:31940
DescriptionACS002N6
This malfunctio

DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) AT-127
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Revision: 2005 July 2005 FX
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)PFP:31940
DescriptionACS002N6
This malfunction is detected when the A/T does not shift into 5th gear position or the torque converter clutch
does not lock-up as instructed by the TCM. This is not only caused by electrical malfunction (circuits open or
shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation,
etc.
CONSULT-II Reference ValueACS003KT
On Board Diagnosis LogicACS002N7
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P0744 A/T TCC S/V FNCTN” with CONSULT-II or 3rd judgement flicker without
CONSULT-II is detected under the following conditions.
–When A/T cannot perform lock-up even if electrical circuit is good.
–When TCM detects as irregular by comparing difference value with slip rotation.
Possible CauseACS002N8
Harness or connectors
(Solenoid circuit is open or shorted.)
Torque converter clutch solenoid valve
Hydraulic control circuit
DTC Confirmation ProcedureACS002N9
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always 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-II
1. Start engine and Select “TCC SOL FNCTN CHECK” of “DTC WORK SUPPORT” mode for “A/T” with CONSULT-II and touch
“START”.
2. Accelerate vehicle to more than 80 km/h (50 MPH) and maintain the following condition continuously until “TESTING” has turned
to “COMPLETE”. (It will take approximately 30 seconds after
“TESTING” shows.)
ACCELE POSI: More than 1.0/8 (at all times during step 4)
TCC SOLENOID: 0.4 - 0.6 A
Selector lever: “D” position
[Reference speed: Constant speed of more than 80 km/h (50
MPH)]
–Make sure “GEAR” shows “5”.
–For shift schedule, refer to AT- 3 5 2 , "Vehicle Speed at Which Lock-up Occurs/Releases" .
–If “TESTING” does not appear on CONSULT-II for a long time, select “SELF-DIAG RESULTS”. In
case a 1st trip DTC other than P0744 is shown, refer to applicable “TROUBLE DIAGNOSIS FOR
DTC”.
3. Make sure that “OK” is displayed. (If “NG” is displayed, refer to “DIAGNOSTIC PROCEDURE”.) Refer to AT- 1 2 8 , "
Diagnostic Procedure" .
Refer to shift schedule, AT- 3 5 2 , "
Vehicle Speed at Which Lock-up Occurs/Releases" .
Item name Condition Display value (Approx.)
TCC SOLENOID Slip lock-up is active 0.2 - 0.4 A
Lock-up is active 0.4 - 0.6 A
BCIA0031E

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INFINITI FX35 2005 Service Manual AT-128
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Revision: 2005 July 2005 FX
WITH GST
Follow the procedure “WITH CONSULT-II”.
Diagnostic ProcedureACS002NA
1. CHECK INPUT SIGNAL
With CONSULT-II

Page 212 of 4731

INFINITI FX35 2005 Service Manual DTC P0745 LINE PRESSURE SOLENOID VALVE AT-129
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Revision: 2005 July 2005 FX
DTC P0745 LINE PRESSURE SOLENOID VALVEPFP:31940
DescriptionACS002NB
The line pressure s

Page 213 of 4731

INFINITI FX35 2005 Service Manual AT-130
DTC P0745 LINE PRESSURE SOLENOID VALVE
Revision: 2005 July 2005 FX
Diagnostic ProcedureACS002NF
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2.

Page 214 of 4731

INFINITI FX35 2005 Service Manual DTC P1702 TRANSMISSION CONTROL MODULE (RAM) AT-131
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Revision: 2005 July 2005 FX
DTC P1702 TRANSMISSION CONTROL MODULE (RAM)PFP:31036
DescriptionACS002NL
The TCM c

Page 215 of 4731

INFINITI FX35 2005 Service Manual AT-132
DTC P1703 TRANSMISSION CONTROL MODULE (ROM)
Revision: 2005 July 2005 FX
DTC P1703 TRANSMISSION CONTROL MODULE (ROM)PFP:31036
DescriptionACS002NQ
The TCM consists of a microcomputer and connecto

Page 216 of 4731

INFINITI FX35 2005 Service Manual DTC P1705 THROTTLE POSITION SENSOR AT-133
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Revision: 2005 July 2005 FX
DTC P1705 THROTTLE POSITION SENSORPFP:22620
DescriptionACS002O0
Electric throttle control a

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