2006 INFINITI FX35 Service Manual

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Page 225 of 4462

INFINITI FX35 2006 Service Manual DTC P1730 A/T INTERLOCK AT-141
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Revision: 2006 December 2006 FX35/FX45
DTC P1730 A/T INTERLOCKPFP:00000
DescriptionNCS001ED
Fail-safe function to detect interlock

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INFINITI FX35 2006 Service Manual AT-142
DTC P1730 A/T INTERLOCK
Revision: 2006 December 2006 FX35/FX45
A/T INTERLOCK COUPLING PATTERN TABLE
: NG, X: OK
Diagnostic ProcedureNCS001EI
1. SELF-DIAGNOSIS
With CONSULT-II
1. Drive ve

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INFINITI FX35 2006 Service Manual DTC P1730 A/T INTERLOCK AT-143
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Revision: 2006 December 2006 FX35/FX45
4. DETECT MALFUNCTIONING ITEM
Check the following.
A/T assembly harness connector pin term

Page 228 of 4462

INFINITI FX35 2006 Service Manual AT-144
DTC P1731 A/T 1ST ENGINE BRAKING
Revision: 2006 December 2006 FX35/FX45
DTC P1731 A/T 1ST ENGINE BRAKINGPFP:00000
DescriptionNCS001EJ
Fail-safe function to prevent sudden decrease in speed by e

AT-144
DTC P1731 A/T 1ST ENGINE BRAKING
Revision: 2006 December 2006 FX35/FX45
DTC P1731 A/T 1ST ENGINE BRAKINGPFP:00000
DescriptionNCS001EJ
Fail-safe function to prevent sudden decrease in speed by engine brake other than at M1 position.
CONSULT-II Reference ValueNCS001EK
On Board Diagnosis LogicNCS001EL
This is not an OBD-II self-diagnostic item.
Diagnostic trouble code “P1731 A/T 1ST E/BRAKING” with CONSULT-II or 13th judgement flicker without
CONSULT-II is detected under the following conditions.
–When TCM does not receive the proper voltage signal from the sensor.
–When TCM monitors each ATF pressure switch and solenoid monitor value, and detects as irregular when
engine brake of 1st gear acts other than at M1 position.
Possible CauseNCS001EM
Harness or connectors
(Sensor circuit is open or shorted.)
Low coast brake solenoid valve
ATF pressure switch 2
DTC Confirmation ProcedureNCS001EN
CAUTION:
Always drive vehicle at a safe speed.
Be careful not to rev engine into red zone on the tachometer.
NOTE:
If “DTC Confirmation Procedure” has been previously preformed, 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. Turn ignition switch ON. (Do not start engine.)
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “A/T” with CONSULT-II and check monitor “ENGINE
SPEED”, “MANU MODE SW” and “GEAR”.
3. Touch “START”.
4. Start engine.
5. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.
ENGINE SPEED: 1,200 rpm
MANU MODE SW: ON
GEAR: “1” position
6. If DTC is detected, go to AT- 1 4 5 , "
Diagnostic Procedure" .
Item name Condition Display value
ON OFF SOL Low coast brake engaged. Refer to
AT- 2 2
.ON
Low coast brake disengaged. Refer to AT- 2 2
.OFF
ATF PRES SW 2 Low coast brake engaged. Refer to
AT- 2 2
.ON
Low coast brake disengaged. Refer to AT- 2 2
.OFF
BCIA0031E

Page 229 of 4462

INFINITI FX35 2006 Service Manual DTC P1731 A/T 1ST ENGINE BRAKING AT-145
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Revision: 2006 December 2006 FX35/FX45
Diagnostic ProcedureNCS001EO
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start t

Page 230 of 4462

INFINITI FX35 2006 Service Manual AT-146
DTC P1752 INPUT CLUTCH SOLENOID VALVE
Revision: 2006 December 2006 FX35/FX45
DTC P1752 INPUT CLUTCH SOLENOID VALVEPFP:31940
DescriptionNCS001EP
Input clutch solenoid valve is controlled by the

AT-146
DTC P1752 INPUT CLUTCH SOLENOID VALVE
Revision: 2006 December 2006 FX35/FX45
DTC P1752 INPUT CLUTCH SOLENOID VALVEPFP:31940
DescriptionNCS001EP
Input clutch solenoid valve is controlled by the TCM in response to signals sent from the PNP switch, vehicle
speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then be shifted to the
optimum position.
CONSULT-II Reference ValueNCS001EQ
On Board Diagnosis LogicNCS001ER
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P1752 I/C SOLENOID/CIRC” with CONSULT-II or 5th judgement flicker without
CONSULT-II is detected under the following conditions.
–When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
–When TCM detects as irregular by comparing target value with monitor value.
Possible CauseNCS001ES
Harness or connectors
(Solenoid circuit is open or shorted.)
Input clutch solenoid valve
DTC Confirmation ProcedureNCS001ET
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. Turn ignition switch ON. (Do not start engine.)
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “A/T” with CONSULT-II and check monitor “ACCELE POSI”,
“SLCT LVR POSI” and “GEAR”.
3. Touch “START”.
4. Start engine.
5. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: “D” position
GEAR: “3” “4” (I/C ON/OFF)
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
6. If DTC is detected go to AT- 1 4 7 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value (Approx.)
I/C SOLENOID Input clutch disengaged. Refer to
AT- 2 2
. 0.6 - 0.8 A
Input clutch engaged. Refer to AT- 2 2
. 0 - 0.05 A
BCIA0031E

Page 231 of 4462

INFINITI FX35 2006 Service Manual DTC P1752 INPUT CLUTCH SOLENOID VALVE AT-147
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Revision: 2006 December 2006 FX35/FX45
Diagnostic ProcedureNCS001EU
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Tur

Page 232 of 4462

INFINITI FX35 2006 Service Manual AT-148
DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION
Revision: 2006 December 2006 FX35/FX45
DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTIONPFP:31940
DescriptionNCS001EV
Input clutch solenoid valve is

AT-148
DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION
Revision: 2006 December 2006 FX35/FX45
DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTIONPFP:31940
DescriptionNCS001EV
Input clutch solenoid valve is controlled by the TCM in response to signals sent from the PNP switch, vehi-
cle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then be
shifted to the optimum position.
This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical mal-
function such as control valve sticking, improper solenoid valve operation.
CONSULT-II Reference ValueNCS001EW
On Board Diagnosis LogicNCS001EX
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P1754 I/C SOLENOID FNCTN” with CONSULT-II or 5th judgement flicker with-
out CONSULT-II is detected under the following conditions.
–When TCM detects that actual gear ratio is irregular, and relation between gear position and condition of
ATF pressure switch 3 is irregular during depressing accelerator pedal. (Other than during shift change)
–When TCM detects that relation between gear position and condition of ATF pressure switch 3 is irregular
during releasing accelerator pedal. (Other than during shift change)
Possible CauseNCS001EY
Harness or connectors
(Solenoid and switch circuits are open or shorted.)
Input clutch solenoid valve
ATF pressure switch 3
DTC Confirmation ProcedureNCS001EZ
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.
2. Accelerate vehicle to maintain the following conditions. ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: “D” position
GEAR: “3” “4” (I/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step “2” again.
4. Turn ignition switch OFF, then perform step “1” to “3” again.
5. Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT- II. If DTC (P1754) is detected, go to AT- 1 4 9 , "
Diagnostic Procedure" .
If DTC (P1752) is detected, go to AT- 1 4 7 , "
Diagnostic Procedure" .
If DTC (P1843) is detected, go to AT- 1 7 4 , "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
I/C SOLENOID Input clutch disengaged. Refer to
AT- 2 2
. 0.6 - 0.8 A
Input clutch engaged. Refer to AT- 2 2
. 0 - 0.05 A
ATF PRES SW 3 Input clutch engaged. Refer to
AT- 2 2
.ON
Input clutch disengaged. Refer to AT- 2 2
.OFF
BCIA0031E

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