Infiniti FX35 / FX45. Manual - part 54

AT-144

< SERVICE INFORMATION >

DTC P1752 INPUT CLUTCH SOLENOID VALVE

4.

Read out the value of “I/C SOLENOID” while driving.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 2.

2.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to 

AT-160

.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

DETECT MALFUNCTIONING ITEM

Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.

OK or NG

OK

>> Replace the control valve with TCM. Refer to 

AT-215, "Control Valve with TCM and A/T Fluid Tem-

perature Sensor 2"

.

NG

>> Repair or replace damaged parts.

4.

CHECK DTC

Perform 

AT-147, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 2.

Item name

Condition 

Display value
(Approx.)

I/C SOLENOID

Input clutch disengaged. Refer to 

AT-18

.

0.6 - 0.8 A

Input clutch engaged. Refer to 

AT-18

.

0  -  0.05  A

DTC P1757 FRONT BRAKE SOLENOID VALVE

AT-145

< SERVICE INFORMATION >

D

E

F

G

H

I

J

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A

B

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P

DTC P1757 FRONT BRAKE SOLENOID VALVE

Description

INFOID:0000000001327271

Front brake 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-III Reference Value in Data Monitor Mode

INFOID:0000000001327272

On Board Diagnosis Logic

INFOID:0000000001327273

Diagnostic trouble code “P1757 FR/B SOLENOID/CIRC” with CONSULT-III or 6th judgement flicker without
CONSULT-III 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 Cause

INFOID:0000000001327274

• Harness or connectors

(Solenoid circuit is open or shorted.)

• Front brake solenoid valve 

DTC Confirmation Procedure

INFOID:0000000001327275

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-III

1.

Turn ignition switch ON.

2.

Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III
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” (FR/B 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-145, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-III”.

Diagnosis Procedure

INFOID:0000000001327276

1.

CHECK INPUT SIGNAL

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3.

Start engine.

Item name

Condition 

Display value (Approx.) 

FR/B SOLENOID

Front brake engaged. Refer to 

AT-18

.

0.6 - 0.8 A

Front brake disengaged. Refer to 

AT-18

.

0  -  0.05  A

AT-146

< SERVICE INFORMATION >

DTC P1757 FRONT BRAKE SOLENOID VALVE

4.

Read out the value of “FR/B SOLENOID” while driving.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 2.

2.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to 

AT-160

.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

DETECT MALFUNCTIONING ITEM

Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.

OK or NG

OK

>> Replace the control valve with TCM. Refer to 

AT-215, "Control Valve with TCM and A/T Fluid Tem-

perature Sensor 2"

.

NG

>> Repair or replace damaged parts.

4.

CHECK DTC

Perform 

AT-106, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 2.

Item name

Condition 

Display value (Approx.)

FR/B SOLENOID

Front brake engaged. Refer to 

AT-18

.

0.6 - 0.8 A

Front brake disengaged. Refer to 

AT-18

.

0 - 0.05 A

DTC P1762 DIRECT CLUTCH SOLENOID VALVE

AT-147

< SERVICE INFORMATION >

D

E

F

G

H

I

J

K

L

M

A

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AT

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O

P

DTC P1762 DIRECT CLUTCH SOLENOID VALVE

Description

INFOID:0000000001327283

Direct 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-III Reference Value in Data Monitor Mode

INFOID:0000000001327284

On Board Diagnosis Logic

INFOID:0000000001327285

Diagnostic trouble code “P1762 D/C SOLENOID/CIRC” with CONSULT-III or 2nd judgement flicker without
CONSULT-III 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 Cause

INFOID:0000000001327286

• Harness or connectors

(Solenoid circuit is open or shorted.)

• Direct clutch solenoid valve 

DTC Confirmation Procedure

INFOID:0000000001327287

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-III

1.

Turn ignition switch ON.

2.

Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III
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: “1” 

⇒

 “2” (D/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-147, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-III”.

Diagnosis Procedure

INFOID:0000000001327288

1.

CHECK INPUT SIGNAL

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3.

Start the engine.

Item name

Condition 

Display value (Approx.)

D/C SOLENOID

Direct clutch disengaged. Refer to 

AT-18

.

0.6 - 0.8 A

Direct clutch engaged. Refer to 

AT-18

.

0  -  0.05  A