Infiniti QX56 (JA60). Manual - part 945

TM-82

< COMPONENT DIAGNOSIS >

P1752 INPUT CLUTCH SOLENOID

P1752 INPUT CLUTCH SOLENOID

Description

INFOID:0000000005148642

Input clutch solenoid valve is controlled by the TCM in response to signals sent from the transmission range

switch, output speed sensor and accelerator pedal position sensor. Gears will then be shifted to the optimum

position.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000005148643

On Board Diagnosis Logic

INFOID:0000000005148644

• This is an OBD-II self-diagnostic item.

• Diagnostic trouble code “P1752 INPUT CLUTCH SOLENOID” with CONSULT-III is detected under the fol-

lowing 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:0000000005148645

• Harness or connectors

(The solenoid circuit is open or shorted.)

• Input clutch solenoid valve 

DTC Confirmation Procedure

INFOID:0000000005148646

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”. (Do not start engine.)

2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3. Start engine.

4. 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: 3rd 

⇒ 4th (I/C ON/OFF) 

Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving

conditions required for this test.

5. If DTC is detected go to 

TM-82, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “With CONSULT-III”.

Diagnosis Procedure

INFOID:0000000005148647

1.

CHECK INPUT SIGNAL

With CONSULT-III

1. Turn ignition switch “ON”. 

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

3. Start the engine.

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

Item name

Condition 

Display value (Approx.)

I/C SOLENOID

Input clutch disengaged. Refer to 

TM-9

.

0.6 - 0.8 A

Input clutch engaged. Refer to 

TM-9

.

0  -  0.05  A

P1752 INPUT CLUTCH SOLENOID

TM-83

< COMPONENT DIAGNOSIS >

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

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 

TM-94, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

DETECT MALFUNCTIONING ITEM

Check the following items:

• The 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 

TM-172, "Control Valve with TCM and A/T Fluid

Temperature Sensor 2 and Plug"

.

NG

>> Repair or replace damaged parts.

4.

CHECK DTC

Perform “DTC Confirmation Procedure”.

• Refer to 

TM-82, "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 

TM-9

.

0.6 - 0.8 A

Input clutch engaged. Refer to 

TM-9

.

0  -  0.05  A

TM-84

< COMPONENT DIAGNOSIS >

P1757 FRONT BRAKE SOLENOID

P1757 FRONT BRAKE SOLENOID

Description

INFOID:0000000005148648

Front brake solenoid valve is controlled by the TCM in response to signals sent from the transmission range

switch, output speed sensor and accelerator pedal position sensor. Gears will then be shifted to the optimum

position.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000005148649

On Board Diagnosis Logic

INFOID:0000000005148650

• This is an OBD-II self-diagnostic item.

• Diagnostic trouble code “P1757 FR BRAKE SOLENOID” with 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:0000000005148651

• Harness or connectors

(The solenoid circuit is open or shorted.)

• Front brake solenoid valve 

DTC Confirmation Procedure

INFOID:0000000005148652

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”. (Do not start engine.)

2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3. Start engine.

4. 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: 3rd 

⇒ 4th (FR/B ON/OFF) 

Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving

conditions required for this test.

5. If DTC is detected go to 

TM-84, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “With CONSULT-III”.

Diagnosis Procedure

INFOID:0000000005148653

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.

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

Item name

Condition 

Display value (Approx.)

FR/B SOLENOID

Front brake engaged. Refer to 

TM-9

.

0.6 - 0.8 A

Front brake disengaged. Refer to 

TM-9

.

0 - 0.05 A

P1757 FRONT BRAKE SOLENOID

TM-85

< COMPONENT DIAGNOSIS >

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

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 

TM-94, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

DETECT MALFUNCTIONING ITEM

Check the following items:

• The 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 

TM-172, "Control Valve with TCM and A/T Fluid

Temperature Sensor 2 and Plug"

.

NG

>> Repair or replace damaged parts.

4.

CHECK DTC

Perform “DTC Confirmation Procedure”.

• Refer to 

TM-84, "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 

TM-9

.

0.6 - 0.8 A

Front brake disengaged. Refer to 

TM-9

.

0 - 0.05 A