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Infiniti FX35, FX50 (S51). Manual - part 1823

P0750 SHIFT SOLENOID A

TM-99

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

>> Repair or replace damaged parts.

TM-100

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

P0775 PRESSURE CONTROL SOLENOID B

P0775 PRESSURE CONTROL SOLENOID B

Description

INFOID:0000000005250078

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

mission range switch, output speed sensor and accelerator pedal 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:0000000005250079

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

CHECK DTC DETECTION

With CONSULT-III

Start the engine.

Select “BATTERY VOLT”, “MANU MODE SW”, “GEAR” and “VHCL/S SE-A/T” in “Data Monitor” in
“TRANSMISSION”.

Drive vehicle and maintain the following conditions for 5 seconds or more.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

With GST

Follow the procedure “With CONSULT-III”.
Is “P0775” detected?

YES

>> Go to

TM-100, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005250080

CHECK INTERMITTENT INCIDENT

Refer to

GI-36, "Intermittent Incident"

Is the inspection result normal?

YES

>> Replace A/T assembly. Refer to

TM-181, "2WD : Exploded View"

(2WD),

TM-184, "AWD :

Exploded View"

(AWD).

>> Repair or replace damaged parts.

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0775

Pressure Control Solenoid B

The input clutch solenoid valve
monitor value is 0.4 A or less
when the input clutch solenoid
valve command value is more
than 0.75 A.

• Harness or connectors

(Solenoid valve circuit is
open or shorted.)

• Input clutch solenoid valve

BATTERY VOLT

: 9 V or more

MANU MODE SW

: ON

GEAR

: 1st

VHCL/S SE-A/T

: 10 km/h (7 MPH) or more

P0780 SHIFT

TM-101

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

P0780 SHIFT

Description

INFOID:0000000005250081

The TCM detects the malfunction of low brake solenoid valve. This is not only caused by electrical malfunction
(circuits open or shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid
valve operation, etc.

DTC Logic

INFOID:0000000005250082

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

CHECK DTC DETECTION

With CONSULT-III

Start the engine.

Select “SLCT LVR POSI”, “ACCELE POSI” and “GEAR” in “Data Monitor” in “TRANSMISSION”.

Drive vehicle and maintain the following conditions.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

With GST

Follow the procedure “With CONSULT-III”.

Is “P0780” detected?

YES

>> Go to

TM-101, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005250083

CHECK INTERMITTENT INCIDENT

Refer to

GI-36, "Intermittent Incident"

Is the inspection result normal?

YES

>> Replace A/T assembly. Refer to

TM-181, "2WD : Exploded View"

(2WD),

TM-184, "AWD :

Exploded View"

(AWD).

>> Repair or replace damaged parts.

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0780

Shift Error

• TCM judges that the gear ra-

tio is not switched to that of
4GR (1.412) while shifting
from 3GR to 4GR in “D” posi-
tion.

• TCM judges that the engine

speed is more than the spec-
ified one while shifting from
5GR to 6GR or from 6GR to
7GR in “D” position.

• Anti-interlock solenoid valve
• Low brake solenoid valve
• Hydraulic control circuit

SLCT LVR POSI

: D

ACCELE POSI

: More than 1.0/8

GEAR

: 3rd

→

4th

TM-102

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

P0795 PRESSURE CONTROL SOLENOID C

P0795 PRESSURE CONTROL SOLENOID C

Description

INFOID:0000000005250084

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

sion range switch, output speed sensor and accelerator pedal 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:0000000005250085

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

CHECK DTC DETECTION

With CONSULT-III

Start the engine.

Select “BATTERY VOLT”, “MANU MODE SW”, “GEAR” and “VHCL/S SE-A/T” in “Data Monitor” in
“TRANSMISSION”.

Drive vehicle and maintain the following conditions for 5 seconds or more.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

With GST

Follow the procedure “With CONSULT-III”.
Is “P0795” detected?

YES

>> Go to

TM-102, "Diagnosis Procedure"