Infiniti QX56 (Z62). Manual - part 1306

 

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Infiniti QX56 (Z62). Manual - part 1306

 

 

P0775 PRESSURE CONTROL SOLENOID B

TM-133

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01B]

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P0775 PRESSURE CONTROL SOLENOID B

DTC Logic

INFOID:0000000006226845

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

1.

PRECONDITIONING

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

>> GO TO 2.

2.

CHECK DTC DETECTION

 With CONSULT-III

1.

Start the engine. 

2.

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

3.

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

4.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

 With GST

Follow the procedure “With CONSULT-III”.

Is “P0775” detected?

YES

>> Go to 

TM-133, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226846

1.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace the control valve & TCM. Refer to 

TM-182, "Exploded View"

.

NO

>> 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

TM-134

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01B]

P0780 SHIFT

P0780 SHIFT

Description

INFOID:0000000006226847

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:0000000006226848

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

• “

TM-134, "Diagnosis Procedure"

” must be performed before starting “DTC CONFIRMATION PROCE-

DURE”.

• Never perform “DTC CONFIRMATION PROCEDURE” before completing the repair, which may cause

secondary malfunction.

• Always drive vehicle at a safe speed.

1.

PRECONDITIONING

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

>> GO TO 2.

2.

CHECK DTC DETECTION

 With CONSULT-III

1.

Start the engine.

2.

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

3.

Drive vehicle and maintain the following conditions.

4.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

 With GST

Follow the procedure “With CONSULT-III”.

Is “P0780” detected?

YES

>> Go to 

TM-134, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226849

1.

DETECT MALFUNCTIONING ITEM

Disassemble the A/T assembly to check component parts. Refer to 

TM-226, "Disassembly"

.

NOTE:

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0780

Shift Error

• When shifting from 3GR to 

4GR with the selector lever in 
“D” position, the gear ratio 
does not shift to 1.412 (gear 
ratio of 4th).

• When shifting from 5GR to 

6GR or 6GR to 7GR, the en-
gine speed exceeds the pre-
scribed speed.

• 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

P0780 SHIFT

TM-135

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01B]

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Check the component parts, referring to “Possible cause” in “DTC DETECTION LOGIC”. Refer to 

TM-134,

"DTC Logic"

.

Is the inspection result normal?

YES

>> Replace the control valve & TCM. Refer to 

TM-182, "Exploded View"

.

NO

>> Repair or replace damaged parts.

TM-136

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01B]

P0795 PRESSURE CONTROL SOLENOID C

P0795 PRESSURE CONTROL SOLENOID C

DTC Logic

INFOID:0000000006226850

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

1.

PRECONDITIONING

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

>> GO TO 2.

2.

CHECK DTC DETECTION

 With CONSULT-III

1.

Start the engine. 

2.

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

3.

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

4.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

 With GST

Follow the procedure “With CONSULT-III”.

Is “P0795” detected?

YES

>> Go to 

TM-136, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226851

1.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace the control valve & TCM. Refer to 

TM-182, "Exploded View"

.

NO

>> Repair or replace damaged parts.

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0795

Pressure Control Solenoid C

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

• Harness or connectors

(Solenoid valve circuit is 
open or shorted.)

• Front brake solenoid valve

BATTERY VOLT

: 9 V or more

MANU MODE SW

: ON

GEAR

: 7th

VHCL/S SE-A/T

: 10 km/h (7 MPH) or more

 

 

 

 

 

 

 

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