Infiniti QX56 (Z62). Manual — part 1302
P0730 INCORRECT GEAR RATIO
TM-117
< DTC/CIRCUIT DIAGNOSIS >
[7AT: RE7R01B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
YES
>> Replace the control valve & TCM. Refer to
.
NO
>> Repair or replace damaged parts.
TM-118
< DTC/CIRCUIT DIAGNOSIS >
[7AT: RE7R01B]
P0731 1GR INCORRECT RATIO
P0731 1GR INCORRECT RATIO
Description
INFOID:0000000006226821
This malfunction is detected when the A/T does not shift into 1GR 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:0000000006226822
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” is previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before performing 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 “1ST GR FNCTN P0731” 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
P0731
Gear 1 Incorrect Ratio
The gear ratio is:
• 5.180 or more
• 4.594 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)
P0731 1GR INCORRECT RATIO
TM-119
< DTC/CIRCUIT DIAGNOSIS >
[7AT: RE7R01B]
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 indicated on CONSULT-III for a long time, check “Self Diagnostic Results”
in “TRANSMISSION”. When a DTC other than “P0731” 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 “P0731”
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 (“P0731” 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:0000000006226823
1.
DETECT MALFUNCTIONING ITEM
Disassemble the A/T assembly to check component parts. Refer to
NOTE:
Check the component parts, referring to “Possible cause” in “DTC DETECTION LOGIC”. Refer to
.
Is the inspection result normal?
YES
>> Replace the control valve & TCM. Refer to
.
NO
>> Repair or replace damaged parts.
GEAR
: 1st
ACCELE POSI
: 0.7/8 or more
VEHICLE SPEED
: 10 km/h (7 MPH) or more
Selector lever
: “M” position
Gear position
: 1st
Accelerator pedal opening
: 0.7/8 or more
Vehicle speed
: 10 km/h (7 MPH) or more
TM-120
< DTC/CIRCUIT DIAGNOSIS >
[7AT: RE7R01B]
P0732 2GR INCORRECT RATIO
P0732 2GR INCORRECT RATIO
Description
INFOID:0000000006226824
This malfunction is detected when the A/T does not shift into 2GR 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:0000000006226825
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” is previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before performing 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 “2ND GR FNCTN P0732” 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
P0732
Gear 2 Incorrect Ratio
The gear ratio is:
• 3.360 or more
• 2.980 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)
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