Nissan Versa Sedan. Manual — part 818
TM-178
< DTC/CIRCUIT DIAGNOSIS >
[4AT: RE4F03C]
P073F UNABLE TO ENGAGE 1GR
3. Keep the current driving status for 2 seconds or more if CONSULT screen changes from “OUT OFCONDI-
TION” to “TESTING”.
CAUTION:
When “TESTING” is not indicated on CONSULT for a long time, check “Self Diagnostic Results” in
“TRANSMISSION”. When a DTC other than “P073F” is detected, check the DTC. Refer to
With GST
1. Drive vehicle and maintain the following conditions for 2 seconds or more.
2. Check the first trip DTC.
Is “OUT OF CONDITION”, “STOP VEHICLE”, or “COMPLETED RESULT NG” displayed? / Is “P073F”
detected?
YES-1 (OUT OF CONDITION.)>>Perform “step 2” again.
YES-2 (STOP VEHICLE.)>>GO TO 3.
YES-3 (COMPLETED RESULT NG)>>Go to
.
YES-4 (“P073F” is detected.)>>Go to
.
NO
>> GO TO 3.
3.
CHECK DTC DETECTION (CHECK 2)
With CONSULT
1. Select “1ST GR FNCTN P0731” in “DTC & SRT confirmation” in “TRANSMISSION”.
NOTE:
“1ST GR FNCTN P0731” can be used in this diagnosis.
2. Drive vehicle according to the following conditions.
3. Keep the current driving status for 2 seconds or more if CONSULT screen changes from “OUT OFCONDI-
TION” to “TESTING”.
CAUTION:
When “TESTING” is not indicated on CONSULT for a long time, check “Self Diagnostic Results” in
“TRANSMISSION”. When a DTC other than “P073F” is detected, check the DTC. Refer to
With GST
1. Drive vehicle and maintain the following conditions for 2 seconds or more.
2. Check the first trip DTC.
Is “OUT OF CONDITION”, “STOP VEHICLE”, or “COMPLETED RESULT NG” displayed? / Is “P073F”
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 (“P073F” is detected.)>>Go to
.
Selector lever
: D position
Gear
: 1GR
Accelerator pedal position
: 3/8 or more
Vehicle speed
: 5 km/h (4 MPH) or more
Selector lever
: D position
Gear
: 1GR
Accelerator pedal position
: 3/8 or more
Vehicle speed
: 5 km/h (4 MPH) or more
Selector lever
: 1 position
Accelerator pedal position
: 0.7/8 or more
Vehicle speed
: 5 km/h (4 MPH) or more
Selector lever
: 1 position
Throttle position
: 0.7/8 or more
Vehicle speed
: 5 km/h (4 MPH) or more
P073F UNABLE TO ENGAGE 1GR
TM-179
< DTC/CIRCUIT DIAGNOSIS >
[4AT: RE4F03C]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
NO
>> GO TO 4.
4.
CHECK SYMPTOM
1. Stop the vehicle.
2. Drive vehicle in “D” position allowing it to shift from 1GR to 4GR and check shift timing and shift shock.
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009267944
1.
MALFUNCTION CAUSE SIMULATION TEST
GI-45, "Intermittent Incident"
.
Is the check result normal?
YES
>> Replace the transaxle assembly. Refer to
TM-250, "Removal and Installation"
.
NO
>> Repair or replace the malfunctioning parts.
TM-180
< DTC/CIRCUIT DIAGNOSIS >
[4AT: RE4F03C]
P0740 TORQUE CONVERTER
P0740 TORQUE CONVERTER
DTC Logic
INFOID:0000000009267945
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Be careful of the driving speed.
1.
PREPARATION BEFORE WORK
If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.
>> GO TO 2.
2.
CHECK DTC DETECTION
1. Drive the vehicle.
2. Maintain the following conditions for 5 seconds or more.
3. Stop the vehicle.
4. Check the first trip DTC.
Is “P0740” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009267946
1.
CHECK CIRCUIT BETWEEN TCM AND THE A/T UNIT
1. Turn the ignition switch OFF.
2. Disconnect the TCM connector and the A/T unit connector.
3. Check the continuity between the TCM harness connector and the A/T unit harness connector.
Is the check result normal?
YES
>> GO TO 2.
NO
>> Repair or replace the malfunctioning parts.
2.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
DTC
Trouble diagnosis name
DTC detection condition
Possible causes
P0740
Torque Converter Clutch Cir-
cuit/Open
The follow diagnosis conditions
are met, and the TCM torque
converter clutch solenoid valve
current monitor reading is 200
mA or less continuously for 0.5
seconds or more.
• Diagnosis condition
- Solenoid valve output cur-
rent: 750 mA or more
- TCM power supply voltage:
10 V < TCM power supply
voltage < 16 V
• Harness or connector
(Torque converter clutch so-
lenoid valve circuit is open or
shorted to power supply.)
• Torque converter clutch sole-
noid valve
Selector lever
: D position
Vehicle speed
: 45 km/h (28 MPH) or more
TCM harness connector
A/T unit harness connector
Continuity
Connector
Terminal
Connector
Terminal
F44
38
F46
18
Exists
P0740 TORQUE CONVERTER
TM-181
< DTC/CIRCUIT DIAGNOSIS >
[4AT: RE4F03C]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Check the torque converter clutch solenoid valve. Refer to
TM-181, "Component Inspection (Torque Converter
.
Is the check result normal?
YES
>> Check intermittent incident. Refer to
GI-45, "Intermittent Incident"
.
NO
>> Repair or replace the malfunctioning parts.
Component Inspection (Torque Converter Clutch Solenoid Valve)
INFOID:0000000009267947
1.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
Check the resistance between the A/T unit connector terminal and ground.
Is the check result normal?
YES
>> INSPECTION END
NO
>> There is a malfunction of the torque converter clutch solenoid valve. Replace the transaxle
assembly. Refer to
TM-250, "Removal and Installation"
A/T unit connector
Ground
Condition
Resistance
Terminal
18
Ground
A/T fluid temperature: 20
°C
(68
°F)
Approx. 6.1
Ω
A/T fluid temperature: 50
°C
(122
°F)
Approx. 6.9
Ω
A/T fluid temperature: 80
°C
(176
°F)
Approx. 7.7
Ω
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