Infiniti G37 Coupe. Manual — part 1321
P0734 A/T 4TH GEAR FUNCTION
TM-137
< COMPONENT DIAGNOSIS >
[5AT: RE5R05A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
3.
Keep the current driving status for at least 5 consecutive seconds if CONSULT-III screen changes from
“OUT OF CONDITION” to “TESTING”.
CAUTION:
If “TESTING” does not appear on CONSULT-III for a long time, select “SELF-DIAG RESULTS”. In
case a 1st trip DTC other than “P0734” is shown, refer to “SELF-DIAGNOSTIC RESULTS”. Refer to
TM-112, "CONSULT-III Function (TRANSMISSION)"
With GST
1.
Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
2.
Check DTC.
Is “STOP VEHICLE” or “COMPLETED RESULT NG” displayed? / Is “P0734” detected?
YES-1 >> “STOP VEHICLE”: GO TO 3.
YES-2 >> “COMPLETED RESULT NG”: Go to
YES-3 >> “P0734” is detected: Go to
NO
>> Check intermittent incident. Refer to
GI-38, "Intermittent Incident"
.
3.
CHECK SYMPTOM 2
With CONSULT-III
1.
Stop vehicle.
2.
Drive vehicle in “D” position allowing it to shift from 1st to 5th gear and check shift timing and shift shock.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-38, "Intermittent Incident"
.
NO
>> Confirm malfunction phenomena by “ROAD TEST” to repair malfunctioning part. Refer to
Diagnosis Procedure
INFOID:0000000001672152
1.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts.
2.
REPLACE CONTROL VALVE WITH TCM
1.
Replace control valve with TCM. Refer to
.
2.
Perform “DTC CONFIRMATION PROCEDURE”. Refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Confirm malfunction phenomena by “ROAD TEST” to repair malfunctioning part. Refer to
Manual mode switch
: ON
Gear position
: “4” position
Accelerator opening
: 0.6/8 or more
Vehicle speed
: 10 km/h (6 MPH) or more
TM-138
< COMPONENT DIAGNOSIS >
[5AT: RE5R05A]
P0735 A/T 5TH GEAR FUNCTION
P0735 A/T 5TH GEAR FUNCTION
Description
INFOID:0000000001672153
This malfunction is detected when the A/T does not shift into 5th gear 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:0000000001672154
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.
1.
CHECK ATF TEMPERATURE
With CONSULT-III
1.
Start the engine.
2.
Select “DATA MONITOR”.
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, GO TO 2.
Is ATF temperature within specified range?
YES
>> GO TO 2.
NO
>> Drive vehicle to warm ATF or stop engine to cool ATF.
2.
CHECK SYMPTOM 1
With CONSULT-III
1.
Select “5TH GR FNCTN P0735” of “DTC WORK SUPPORT”.
2.
Drive vehicle and maintain the following conditions.
DTC
Item
(CONSULT-III screen
terms)
A/T CHECK indicator
lamp judgment flicker
Diagnostic item is de-
tected when...
Possible cause
P0735
A/T 5TH GR FNCTN
22nd
TCM detects any incon-
sistency in the actual
gear ratio.
• Input clutch solenoid
valve
• Front brake solenoid
valve
• Direct clutch solenoid
valve
• High and low reverse
clutch solenoid valve
• Each clutch
• Hydraulic control cir-
cuit
ATF TEMP 1
: 20
°
C – 140
°
C
MANU MODE SW
: ON
GEAR
: “5” position
ACCELE POSI
: 0.6/8 or more
VEHICLE SPEED
: 10 km/h (6 MPH) or more
ENGINE SPEED
: TURBINE REV
−
50 rpm or more
TURBINE REV
: 300 rpm or more
P0735 A/T 5TH GEAR FUNCTION
TM-139
< COMPONENT DIAGNOSIS >
[5AT: RE5R05A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
3.
Keep the current driving status for at least 5 consecutive seconds if CONSULT-III screen changes from
“OUT OF CONDITION” to “TESTING”.
CAUTION:
If “TESTING” does not appear on CONSULT-III for a long time, select “SELF-DIAG RESULTS”. In
case a 1st trip DTC other than “P0735” is shown, refer to “SELF-DIAGNOSTIC RESULTS”. Refer to
TM-112, "CONSULT-III Function (TRANSMISSION)"
With GST
1.
Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
2.
Check DTC.
Is “STOP VEHICLE” or “COMPLETED RESULT NG” displayed? / Is “P0735” detected?
YES-1 >> “STOP VEHICLE”: GO TO 3.
YES-2 >> “COMPLETED RESULT NG”: Go to
YES-3 >> “P0735” is detected: Go to
NO
>> Check intermittent incident. Refer to
GI-38, "Intermittent Incident"
.
3.
CHECK SYMPTOM 2
With CONSULT-III
1.
Stop vehicle.
2.
Drive vehicle in “D” position allowing it to shift from 1st to 5th gear and check shift timing and shift shock.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-38, "Intermittent Incident"
.
NO
>> Confirm malfunction phenomena by “ROAD TEST” to repair malfunctioning part. Refer to
Diagnosis Procedure
INFOID:0000000001672155
1.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts.
2.
REPLACE CONTROL VALVE WITH TCM
1.
Replace control valve with TCM. Refer to
2.
Perform “DTC CONFIRMATION PROCEDURE”. Refer to
.
Is the inspection result normal?
YES
>> INSPECTION END.
NO
>> Confirm malfunction phenomena by “ROAD TEST” to repair malfunctioning part. Refer to
Manual mode switch
: ON
Gear position
: “5” position
Accelerator opening
: 0.6/8 or more
Vehicle speed
: 10 km/h (6 MPH) or more
TM-140
< COMPONENT DIAGNOSIS >
[5AT: RE5R05A]
P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Description
INFOID:0000000001672156
• The torque converter clutch solenoid valve is activated, with the gear in D
3
, D
4
, D
5
, M2, M3, M4 and M5 by
the TCM in response to signals transmitted from the vehicle speed sensor and accelerator pedal position
sensor (throttle position sensor). Torque converter clutch piston operation will then be controlled.
• 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:0000000001672157
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.
1.
CHECK DTC DETECTION
With CONSULT-III
1.
Start the engine.
2.
Select “DATA MONITOR”.
3.
Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
With GST
Follow the procedure “With CONSULT-III”.
Is “P0740 TCC SOLENOID/CIRC” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-38, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000001672158
1.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
Is the inspection result normal?
YES
>> Replace the control valve with TCM. Refer to
NO
>> Repair or replace damaged parts.
DTC
Item
(CONSULT-III screen
terms)
A/T CHECK indicator
lamp judgment flicker
Diagnostic item is de-
tected when...
Possible cause
P0740
TCC SOLENOID/CIRC
3rd
Normal voltage not ap-
plied to solenoid due to
cut line, short, or the like.
• Harness or connectors
(Solenoid circuit is
open or shorted.)
• Torque converter
clutch solenoid valve
VHCL/S SE-A/T
: 80 km/h (50 MPH) or more
ACCELE POSI
: 0.5/8 – 1.0/8
SLCT LVR POSI
: “D” position
Drive location
: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
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