Infiniti G37 Coupe. Manual - part 1324

P1731 A/T 1ST ENGINE BRAKING

TM-149

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

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P1731 A/T 1ST ENGINE BRAKING

Description

INFOID:0000000001672180

Fail-safe function to prevent sudden decrease in speed by engine brake other than at M1 position.

DTC Logic

INFOID:0000000001672181

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously preformed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Start the engine.

2.

Select “DATA MONITOR”.

3.

Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.

Is “P1731 A/T 1ST E/BRAKING” detected?

YES

>> Go to 

TM-149, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000001672182

1.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to 

TM-163, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace the control valve with TCM. Refer to 

TM-232, "Exploded View"

.

NO

>> Repair or replace damaged parts.

DTC

Item

(CONSULT-III screen 

terms)

A/T CHECK indicator 
lamp judgment flicker

Diagnostic item is de-

tected when...

Possible cause

P1731

A/T 1ST E/BRAKING

13th

ATF pressure switch 2 
and solenoid current is 
monitor and if a pattern is 
detected having engine 
braking 1st gear other 
than in the M1 position, a 
malfunction is detected.

• Harness or connectors

(Sensor circuit is open 
or shorted.)

• Low coast brake sole-

noid valve

• ATF pressure switch 2

ENGINE SPEED

: 1,200 rpm

GEAR

: “1” position

MANU MODE SW

: ON

TM-150

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P1752 INPUT CLUTCH SOLENOID VALVE

P1752 INPUT CLUTCH SOLENOID VALVE

Description

INFOID:0000000001672183

• The Input clutch solenoid valve is controlled by the TCM in response to signals transmitted from the PNP

switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then
be shifted to the optimum position.

• The Input clutch solenoid valve controls the input clutch control valve in response to a signal transmitted

from the TCM.

DTC Logic

INFOID:0000000001672184

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Start the engine.

2.

Select “DATA MONITOR”.

3.

Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.
Is “P1752 I/C SOLENOID/CIRC” detected?

YES

>> Go to 

TM-150, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000001672185

1.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to 

TM-163, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace the control valve with TCM. Refer to 

TM-232, "Exploded View"

.

NO

>> Repair or replace damaged parts.

DTC

Item

(CONSULT-III screen 

terms)

A/T CHECK indicator 
lamp judgment flicker

Diagnostic item is de-

tected when...

Possible cause

P1752

I/C SOLENOID/CIRC

5th

• Normal voltage not ap-

plied to solenoid due 
to cut line, short, or the 
like.

• TCM detects as irregu-

lar by comparing tar-
get value with monitor 
value.

• Harness or connectors

(Solenoid circuit is 
open or shorted.)

• Input clutch solenoid 

valve

ACCELE POSI

: 1.5/8 – 2.0/8

GEAR

: “3”

⇒

“4” (I/C ON/OFF)

SLCT LVR POSI

: “D” position

Driving location

: Driving the vehicle uphill (increased engine load) will help maintain the driving con-
ditions required for this test.

P1757 FRONT BRAKE SOLENOID VALVE

TM-151

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

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P1757 FRONT BRAKE SOLENOID VALVE

Description

INFOID:0000000001672186

• The front brake solenoid valve is controlled by the TCM in response to signals transmitted from the PNP

switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then
be shifted to the optimum position.

• The front brake solenoid valve controls the front brake control valve in response to a signal transmitted from

the TCM.

DTC Logic

INFOID:0000000001672187

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

 With CONSULT-III

1.

Start the engine.

2.

Select “DATA MONITOR”.

3.

Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.
Is “P1757 FR/B SOLENOID/CIRC” detected?

YES

>> Go to 

TM-151, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000001672188

1.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to 

TM-163, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace the control valve with TCM. Refer to 

TM-232, "Exploded View"

.

NO

>> Repair or replace damaged parts.

DTC

Item

(CONSULT-III screen 

terms)

A/T CHECK indicator 
lamp judgment flicker

Diagnostic item is de-

tected when...

Possible cause

P1757

FR/B SOLENOID/CIRC

6th

• Normal voltage not ap-

plied to solenoid due 
to cut line, short, or the 
like.

• TCM detects as irregu-

lar by comparing tar-
get value with monitor 
value.

• Harness or connectors

(Solenoid circuit is 
open or shorted.)

• Front brake solenoid 

valve

ACCELE POSI

: 1.5/8 – 2.0/8

GEAR

: “3”

⇒

“4” (FR/B ON/OFF)

SLCT LVR POSI

: “D” position

Drive location

: Driving the vehicle uphill (increased engine load) will help maintain the driving condi-
tions required for this test.

TM-152

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P1762 DIRECT CLUTCH SOLENOID VALVE

P1762 DIRECT CLUTCH SOLENOID VALVE

Description

INFOID:0000000001672189

• The direct clutch solenoid valve is controlled by the TCM in response to signals transmitted from the PNP

switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then
be shifted to the optimum position.

• The direct clutch solenoid valve controls the direct clutch control valve in response to a signal transmitted

from the TCM.

DTC Logic

INFOID:0000000001672190

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

 With CONSUTL-III

1.

Start the engine.

2.

Select “DATA MONITOR”.

3.

Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.
Is “P1762 D/C SOLENOID/CIRC” detected?

YES

>> Go to 

TM-152, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000001672191

1.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to 

TM-163, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace the control valve with TCM. Refer to 

TM-232, "Exploded View"

.

NO

>> Repair or replace damaged parts.

DTC

Item

(CONSULT-III screen 

terms)

A/T CHECK indicator 
lamp judgment flicker

Diagnostic item is de-

tected when...

Possible cause

P1762

D/C SOLENOID/CIRC

2nd

• Normal voltage not ap-

plied to solenoid due 
to cut line, short, or the 
like.

• TCM detects as irregu-

lar by comparing tar-
get value with monitor 
value.

• Harness or connectors

(Solenoid circuit is 
open or shorted.)

• Direct clutch solenoid 

valve

ACCELE POSI

: 1.5/8 – 2.0/8

GEAR

: “1”

⇒

“2” (D/C ON/OFF)

SLCT LVR POSI

: “D” position

Driving location

: Driving the vehicle uphill (increased engine load) will help maintain the driving con-
ditions required for this test.