Infiniti FX35, FX50 (S51). Manual — part 1818
P0725 ENGINE SPEED
TM-79
< DTC/CIRCUIT DIAGNOSIS >
[7AT: RE7R01A (VQ35HR)]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
3.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace A/T assembly. Refer to
(AWD).
NO
>> Repair or replace damaged parts.
TM-80
< DTC/CIRCUIT DIAGNOSIS >
[7AT: RE7R01A (VQ35HR)]
P0729 6GR INCORRECT RATIO
P0729 6GR INCORRECT RATIO
Description
INFOID:0000000005250045
This malfunction is detected when the A/T does not shift into 6GR 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:0000000005250046
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
• “
” 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 “6TH GR FNCTN P0729” 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
P0729
Gear 6 Incorrect Ratio
The gear ratio is:
• 0.914 or more
• 0.810 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)
P0729 6GR INCORRECT RATIO
TM-81
< 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 “P0729” is detected, check the DTC. Refer to
.
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 “P0729”
detected?
YES-1 >> “OUT OF CONDITION”: Perform “Step 3” again.
YES-2 >> “STOP VEHICLE”: GO TO 4.
YES-3 >> “COMPLETED RESULT NG”: Go to
YES-4 >> “P0729” is detected: Go to
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:0000000005250047
1.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace A/T assembly. Refer to
(AWD).
NO
>> Repair or replace damaged parts.
GEAR
: 6th
ACCELE POSI
: 0.7/8 or more
VEHICLE SPEED
: 10 km/h (7 MPH) or more
Selector lever
: “M” position
Gear position
: 6th
Accelerator pedal opening
: 0.7/8 or more
Vehicle speed
: 10 km/h (7 MPH) or more
TM-82
< DTC/CIRCUIT DIAGNOSIS >
[7AT: RE7R01A (VQ35HR)]
P0730 INCORRECT GEAR RATIO
P0730 INCORRECT GEAR RATIO
Description
INFOID:0000000005250048
• TCM detects a high-rpm state of the under drive sun gear.
• The number of revolutions of the under drive sun gear is calculated with the input speed sensor 1 and 2.
DTC Logic
INFOID:0000000005250049
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
• “
” 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 DTC DETECTION
With CONSULT-III
1.
Start the engine.
2.
Select “Self Diagnostic Results” in “ENGINE”.
3.
Drive vehicle under the similar conditions to (1st trip) Freeze Frame Data for 10 minutes. Refer to the
table below.
Hold the accelerator pedal as steady as possible.
With GST
Follow the procedure “With CONSULT-III”.
Is “P0730” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005250050
1.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
Is the inspection result normal?
YES
>> Replace A/T assembly. Refer to
(2WD),
(AWD).
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0730
Incorrect Gear Ratio
The revolution of under drive
sun gear is 8,000 rpm or more.
NOTE:
Not detected when in “P” or “N”
position and during a shift to “P”
or “N” position.
• 2346 brake solenoid valve
• Front brake solenoid valve
• Input speed sensor 1, 2
ENGINE SPEED
Same value as the Freeze Frame Data.
VEHICLE SPEED
Same value as the Freeze Frame Data.
B/FUEL SCHDL
Same value as the Freeze Frame Data.
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