Infiniti FX35, FX50 (S51). Manual - part 1821

 

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Infiniti FX35, FX50 (S51). Manual - part 1821

 

 

P0734 4GR INCORRECT RATIO

TM-91

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

3.

Keep the current driving status for 2 seconds or more if CONSULT-III screen changes from “OUT OF
CONDITION” to “TESTING”.

CAUTION:

When “TESTING” is not detected on CONSULT-III for a long time, check “Self Diagnostic Results”
in “TRANSMISSION”. When a DTC other than “P0734” is detected, check the DTC. Refer to 

TM-

150, "DTC Index"

.

 With GST

1.

Drive vehicle and maintain the following conditions for 2 seconds or more.

2.

Check DTC.

Is  “OUT OF CONDITION”,  “STOP VEHICLE” or “COMPLETED RESULT NG” displayed? / Is “P0734”
detected?

YES-1 >> “OUT OF CONDITION”: Perform “Step 3” again.
YES-2 >> “STOP VEHICLE”: GO TO 4.
YES-3 >> “COMPLETED RESULT NG”: Go to 

TM-91, "Diagnosis Procedure"

.

YES-4 >> “P0734” is detected: Go to 

TM-91, "Diagnosis Procedure"

.

NO

>> GO TO 4.

4.

CHECK SYMPTOM (PART 2)

1.

Stop vehicle.

2.

Drive vehicle in “D” position allowing it to shift from 1GR to 7GR and check shift timing and shift shock.

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005250062

1.

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).

NO

>> Repair or replace damaged parts.

GEAR

: 4th

ACCELE POSI

: 0.7/8 or more

VEHICLE SPEED

: 10 km/h (7 MPH) or more

Selector lever

: “M” position

Gear position

: 4th

Accelerator pedal opening

: 0.7/8 or more

Vehicle speed

: 10 km/h (7 MPH) or more

TM-92

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

P0735 5GR INCORRECT RATIO

P0735 5GR INCORRECT RATIO

Description

INFOID:0000000005250063

This malfunction is detected when the A/T does not shift into 5GR position as instructed by TCM. This is not
only caused by electrical malfunction (circuits open or shorted) but by mechanical malfunction such as control
valve sticking, improper solenoid valve operation, etc.

DTC Logic

INFOID:0000000005250064

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

• “

TM-93, "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” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK ATF TEMPERATURE

 With CONSULT-III

1.

Start the engine.

2.

Select “ATF TEMP 1” in “Data Monitor” in “TRANSMISSION”.

3.

Check ATF temperature is in the following range.

 With GST

1.

Start the engine.

2.

Drive vehicle for approximately 5 minutes in urban areas.

Is ATF temperature within specified range?

YES

>> GO TO 3.

NO

>> Drive vehicle to warm ATF or stop engine to cool ATF.

3.

CHECK SYMPTOM (PART 1)

 With CONSULT-III

1.

Select “5TH GR FNCTN P0735” in “DTC & SRT confirmation” in “TRANSMISSION”.

2.

Drive vehicle with manual mode and maintain the following conditions.

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0735

Gear 5 Incorrect Ratio

The gear ratio is:
• 1.060 or more
• 0.940 or less

• Input clutch solenoid valve
• Direct clutch solenoid valve
• High and low reverse clutch 

solenoid valve

• Front brake solenoid valve
• Low brake solenoid valve
• 2346 brake solenoid valve
• Anti-interlock solenoid valve
• Each clutch and brake
• Output speed sensor
• Input speed sensor 1, 2
• Hydraulic control circuit

ATF TEMP 1

: 20

°

C (68

°

F) – 140

°

C (284

°

F)

P0735 5GR INCORRECT RATIO

TM-93

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

3.

Keep the current driving status for 2 seconds or more if CONSULT-III screen changes from “OUT OF
CONDITION” to “TESTING”.

CAUTION:

When “TESTING” is not detected on CONSULT-III for a long time, check “Self Diagnostic Results”
in “TRANSMISSION”. When a DTC other than “P0735” is detected, check the DTC. Refer to 

TM-

150, "DTC Index"

.

 With GST

1.

Drive vehicle and maintain the following conditions for 2 seconds or more.

2.

Check DTC.

Is  “OUT OF CONDITION”,  “STOP VEHICLE” or “COMPLETED RESULT NG” displayed? / Is “P0735”
detected?

YES-1 >> “OUT OF CONDITION”: Perform “Step 3” again.
YES-2 >> “STOP VEHICLE”: GO TO 4.
YES-3 >> “COMPLETED RESULT NG”: Go to 

TM-93, "Diagnosis Procedure"

.

YES-4 >> “P0735” is detected: Go to 

TM-93, "Diagnosis Procedure"

.

NO

>> GO TO 4.

4.

CHECK SYMPTOM (PART 2)

1.

Stop vehicle.

2.

Drive vehicle in “D” position allowing it to shift from 1GR to 7GR and check shift timing and shift shock.

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005250065

1.

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).

NO

>> Repair or replace damaged parts.

GEAR

: 5th

ACCELE POSI

: 0.7/8 or more

VEHICLE SPEED

: 10 km/h (7 MPH) or more

Selector lever

: “M” position

Gear position

: 5th

Accelerator pedal opening

: 0.7/8 or more

Vehicle speed

: 10 km/h (7 MPH) or more

TM-94

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

P0740 TORQUE CONVERTER

P0740 TORQUE CONVERTER

Description

INFOID:0000000005250066

• The torque converter clutch solenoid valve is activated, with the gear in D

2

, D

3

, D

4

, D

5

, D

6

, D

7

, M2, M3, M4,

M5, M6 and M7 by the TCM in response to signals transmitted from the vehicle speed sensor and accelera-
tor pedal position sensor (throttle position sensor). Torque converter clutch piston operation will then be con-
trolled.

• Lock-up operation, however, is prohibited when A/T fluid temperature is too low.
• When the accelerator pedal is depressed (less than 1.0/8) in lock-up condition, the engine speed should not

change abruptly. If there is a big jump in engine speed, there is no lock-up.

DTC Logic

INFOID:0000000005250067

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

1.

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.

2.

CHECK DTC DETECTION

 With CONSULT-III

1.

Start the engine.

2.

Select “BATTERY VOLT”, “MANU MODE SW”, “GEAR” and “VEHICLE SPEED” in “Data Monitor” in
“TRANSMISSION”

3.

Drive vehicle and maintain the following conditions for 30 seconds or more.
NOTE:
Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this
test.

4.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

 With GST

Follow the procedure “With CONSULT-III”.
Is “P0740” detected?

YES

>> Go to 

TM-94, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005250068

1.

CHECK INTERMITTENT INCIDENT

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0740

Torque Converter Clutch Cir-
cuit/Open

The torque converter clutch so-
lenoid valve monitor value is 0.4 
A or less when the torque con-
verter clutch solenoid valve 
command value is more than 
0.75 A.

• Harness or connectors

(Solenoid valve circuit is 
open or shorted.)

• Torque converter clutch sole-

noid valve

BATTERY VOLT

: 9 V or more

MANU MODE SW

: ON

GEAR

: 2nd

VEHICLE SPEED

: 40 km/h (25 MPH) or more

 

 

 

 

 

 

 

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