Nissan Maxima. Instruction — part 1155
TM-84
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0826 UP AND DOWN SHIFT SW
Component Inspection (Paddle Shifter)
INFOID:0000000010113642
1.
CHECK PADDLE SHIFTER
Check continuity between paddle shifter connector terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace damaged parts.
Paddle shifter connector
Condition
Continuity
Connector
Terminal
M82 (A)
1
3
Pressed paddle shifter (shift-up)
Existed
Released paddle shifter
Not existed
M83 (B)
1
3
Pressed paddle shifter (shift-down)
Existed
Released paddle shifter
Not existed
AWDIA0609ZZ
P0840 TRANSMISSION FLUID PRESSURE SEN/SW A
TM-85
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
P0840 TRANSMISSION FLUID PRESSURE SEN/SW A
Description
INFOID:0000000010113643
The secondary pressure sensor detects secondary pressure of CVT and sends a signal to the TCM.
DTC Logic
INFOID:0000000010113644
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
1.
CHECK DTC DETECTION
With CONSULT
1. Turn ignition switch ON.
2. Select “Data Monitor” in “TRANSMISSION”.
3. Check that output voltage of CVT fluid temperature sensor is within the range below.
4. Start engine and wait for at least 5 consecutive seconds.
With GST
Follow the procedure “With CONSULT”.
Is “P0840” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000010113645
Regarding Wiring Diagram information, refer to
.
1.
CHECK INPUT SIGNAL
1. Start engine.
2. Check voltage between TCM connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 2.
2.
CHECK POWER AND SENSOR GROUND
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0840
Transmission Fluid Pressure
Sensor/Switch A Circuit
Signal voltage of the secondary pressure
sensor is too high or too low while driving.
• Harness or connectors
(Sensor circuit is open or shorted.)
• Secondary pressure sensor
ATF TEMP SEN
: 1.0 – 2.0 V
If it is out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the voltage
(cool down the fluid)
TCM connector
Ground
Condition
Voltage
(Approx.)
Connector
Terminal
F15
15
“N” position idle
1.0 – 1.5 V
AWDIA0131ZZ
TM-86
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0840 TRANSMISSION FLUID PRESSURE SEN/SW A
Check voltage between TCM terminals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 5.
3.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (SECONDARY PRESSURE SENSOR) (PART 1)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and CVT unit connector.
3. Check continuity between TCM vehicle side harness connector
terminal and CVT unit vehicle side harness connector terminal.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (SECONDARY PRESSURE SENSOR) (PART 2)
Check continuity between TCM vehicle side harness connector ter-
minal and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace damaged parts.
5.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (SENSOR POWER AND SENSOR GROUND) (PART
1)
1. Turn ignition switch OFF.
2. Disconnect TCM connector and CVT unit connector.
3. Check continuity between TCM vehicle side harness connector
terminals and CVT unit vehicle side harness connector termi-
nals.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace damaged parts.
6.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (SENSOR POWER AND SENSOR GROUND) (PART
TCM connector
Voltage (Approx.)
Connector
Terminal
F15
25
26
4.75 – 5.25 V
AWDIA0132ZZ
TCM vehicle side harness
connector
CVT unit vehicle side harness
connector
Continuity
Connector
Terminal
Connector
Terminal
F15 (A)
15
F46 (B)
23
Existed
AWDIA0133ZZ
TCM vehicle side harness connector
Ground
Continuity
Connector
Terminal
F15
15
Not existed
AWDIA0134ZZ
TCM vehicle side harness con-
nector
CVT unit vehicle side harness
connector
Continuity
Connector
Terminal
Connector
Terminal
F15 (A)
25
F46 (B)
19
Existed
26
20
AWDIA0135ZZ
P0840 TRANSMISSION FLUID PRESSURE SEN/SW A
TM-87
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
2)
Check continuity between TCM vehicle side harness connector ter-
minals and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace damaged parts.
7.
CHECK TCM
1. Replace with the same type of TCM. Refer to
.
2. Connect each connector.
3. Perform “DTC CONFIRMATION PROCEDURE”. Refer to
.
Is “P0840” detected?
YES
>> Replace transaxle assembly. Refer to
NO
8.
DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
NO
>> Repair or replace damaged parts.
TCM vehicle side harness connector
Ground
Continuity
Connector
Terminal
F15
25
Not existed
26
AWDIA0136ZZ
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