Infiniti G37 Coupe. Manual - part 1325

P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

TM-153

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

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P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

Description

INFOID:0000000001672192

• The high and low reverse 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 high and low reverse clutch solenoid valve controls the high and low reverse clutch control valve in

response to a signal transmitted from the TCM.

DTC Logic

INFOID:0000000001672193

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 “P1767 HLR/C SOL/CIRC” detected?

YES

>> Go to 

TM-153, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000001672194

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

P1767

HLR/C SOL/CIRC

8th

• 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.)

• High and low reverse 

clutch solenoid valve

ACCELE POSI

: 1.5/8 – 2.0/8

GEAR

: “2”

⇒

“3” (HLR/C ON/OFF)

SLCT LVR POSI

: “D” position

Driving location

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

TM-154

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P1772 LOW COAST BRAKE SOLENOID VALVE

P1772 LOW COAST BRAKE SOLENOID VALVE

Description

INFOID:0000000001672195

• The low coast brake solenoid valve is turned ON or OFF 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 low coast brake solenoid valve controls the low coast brake switching valve in response to a signal

transmitted from the TCM.

DTC Logic

INFOID:0000000001672196

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 “P1772 LC/B SOLENOID/CIRC” detected?

YES

>> Go to 

TM-154, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000001672197

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

P1772

LC/B SOLENOID/CIRC

7th

Normal voltage not ap-
plied to solenoid due to 
cut line, short, or the like.

• Harness or connectors

(Solenoid circuit is 
open or shorted.)

• Low coast brake sole-

noid valve

GEAR

: “1” or “2” (LC/B ON/OFF)

MANU MODE SW

: ON

P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION

TM-155

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION

Description

INFOID:0000000001672198

• Low coast brake solenoid valve is turned ON or OFF 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.

• This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical malfunc-

tion such as control valve sticking, improper solenoid valve operation.

DTC Logic

INFOID:0000000001672199

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.

4.

Stop vehicle and perform step 3 again.

5.

Stop vehicle.

6.

Turn ignition switch OFF, then perform step 1 to 4 again.

With GST

Follow the procedure “With CONSULT-III”.
Is “P1774 LC/B SOLENOID FNCT” detected?

YES

>> Go to 

TM-155, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000001672200

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"

.

DTC

Item

(CONSULT-III screen 

terms)

A/T CHECK indicator 
lamp judgment flicker

Diagnostic item is de-

tected when...

Possible cause

P1774

LC/B SOLENOID FNCT

7th

• TCM detects an im-

proper voltage drop 
when it tries to operate 
the solenoid valve.

• Condition of ATF pres-

sure switch 2 is differ-
ent from monitor 
value, and relation be-
tween gear position 
and actual gear ratio is 
irregular.

• Harness or connectors

(Solenoid and switch 
circuit is open or short-
ed.)

• Low coast brake sole-

noid valve

• ATF pressure switch 2

GEAR

: “1” or “2” (LC/B ON/OFF)

MANU MODE SW

: ON

TM-156

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION

NO

>> Repair or replace damaged parts.