Nissan Pathfinder (2010 year). Instruction — part 624
TM-120
< ECU DIAGNOSIS >
TCM
ABDIA0400GB
2010 Pathfinder
TCM
TM-121
< ECU DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
ABDIA0401GB
2010 Pathfinder
TM-122
< ECU DIAGNOSIS >
TCM
ABDIA0402GB
2010 Pathfinder
TCM
TM-123
< ECU DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Fail-Safe
INFOID:0000000005258137
The TCM has an electrical fail-safe mode. This mode makes it possible to operate even if there is an error in a
main electronic control input/output signal circuit. In fail-safe mode the transmission is fixed in 2nd, 4th or 5th
(depending on the breakdown position), so the customer should feel “slipping” or “poor acceleration”.
Even when the electronic circuits are normal, under special conditions (for example, when slamming on the
brake with the wheels spinning drastically and stopping the tire rotation), the transmission can go into fail-safe
mode. If this happens, switch “OFF” the ignition switch for 10 seconds, then switch it “ON” again to return to
ABDIA0403GB
2010 Pathfinder
TM-124
< ECU DIAGNOSIS >
TCM
the normal shift pattern. Therefore, the customer's vehicle has returned to normal, so handle according to the
“diagnostics flow” (Refer to
).
FAIL-SAFE FUNCTION
If any malfunction occurs in a sensor or solenoid, this function controls the A/T to mark driving possible.
Output Speed Sensor
• Signals are input from two systems - from output speed sensor installed on the transmission and from com-
bination meter so normal driving is possible even if there is a malfunction in one of the systems. And if output
speed sensor has unusual cases, 5GR is prohibited.
Accelerator Pedal Position Sensor
• If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM according
to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow sys-
tems, the engine speed is fixed by ECM to a pre-determined engine speed to make driving possible.
Throttle Position Sensor
• If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM according
to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow sys-
tems, the accelerator opening angle is controlled by the idle signal sent from the ECM which is based on
input indicating either idle condition or off-idle condition (pre-determined accelerator opening) in order to
make driving possible.
Transmission Range Switch
• In the unlikely event that a malfunction signal enters the TCM, the position indicator is switched “OFF”, the
starter relay is switched “OFF” (starter starting is disabled), the back-up lamp relay switched “OFF” (back-up
lamp is OFF) and the position is fixed to the “D” range to make driving possible.
Starter Relay
• The starter relay is switched “OFF”. (Starter starting is disabled.)
Interlock
• If there is an interlock judgment malfunction, the transmission is fixed in 2GR to make driving possible.
NOTE:
When the vehicle is driven fixed in 2GR, a input speed sensor malfunction is displayed, but this is
not a input speed sensor malfunction.
• When interlock is detected at the 3GR or more, it is locked at the 2GR.
1st Engine Braking
• When there is an 1st engine brake judgment malfunction, the low coast brake solenoid is switched “OFF” to
avoid the engine brake operation.
Line Pressure Solenoid
• The solenoid is switched “OFF” and the line pressure is set to the maximum hydraulic pressure to make driv-
ing possible.
Torque Converter Clutch Solenoid
• The solenoid is switched “OFF” to release the lock-up.
Low Coast Brake Solenoid
• When a (electrical or functional) malfunction occurs, in order to make driving possible, the engine brake is
not applied in 1GR and 2GR.
Input Clutch Solenoid
• If a (electrical or functional) malfunction occurs with the solenoid either “ON” or “OFF”, the transmission is
held in 4GR to make driving possible.
Direct Clutch Solenoid
• If a (electrical or functional) malfunction occurs with the solenoid either “ON” or “OFF”, the transmission is
held in 4GR to make driving possible.
Front Brake Solenoid
• If a (electrical or functional) malfunction occurs with the solenoid “ON”, in order to make driving possible, the
A/T is held in 5GR; if the solenoid is OFF, 4GR.
High and Low Reverse Clutch Solenoid
• If a (electrical or functional) malfunction occurs with the solenoid either “ON” or “OFF”, the transmission is
held in 4GR to make driving possible.
2010 Pathfinder
TCM
TM-125
< ECU DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Input Speed Sensor 1 or 2
• The control is the same as if there were no turbine revolution sensors, 5GR is prohibited.
DTC Inspection Priority Chart
INFOID:0000000005258138
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC U1000 is displayed with other DTCs, first perform the trouble diagnosis for DTC U1000. Refer to
DTC No. Index
INFOID:0000000005258139
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
Priority
Detected items (DTC)
1
U1000 CAN COMM CIRCUIT
2
Except above
DTC
Items
(CONSULT- III screen terms)
Reference page
OBD- II
Except OBD- II
CONSULT- III
GST (*1)
CONSULT- III
only “TRANSMIS-
SION”
—
P0615
STARTER RELAY
P0700
P0700
TRANSMISSION CONTROL
P0705
P0705
T/M RANGE SWITCH A
P0710
P1710
FLUID TEMP SENSOR A
P0717
P0717
INPUT SPEED SENSOR A
P0720
P0720
OUTPUT SPEED SENSOR
—
P0725
ENGINE SPEED
P0731
P0731
1GR INCORRECT RATIO
P0732
P0732
2GR INCORRECT RATIO
P0733
P0733
3GR INCORRECT RATIO
P0734
P0734
4GR INCORRECT RATIO
P0735
P0735
5GR INCORRECT RATIO
P0740
P0740
TORQUE CONVERTER
P0744 (*2)
P0744
TORQUE CONVERTER
P0745
P0745
PC SOLENOID A
—
P1705
TP SENSOR
—
P1721
VEHICLE SPEED SIGNAL
P1730
P1730
INTERLOCK
—
P1731
1GR E/BRAKING
P1752
P1752
INPUT CLUTCH SOL
P1757
P1757
FR BRAKE SOLENOID
P1762
P1762
DRCT CLUTCH SOL
P1767
P1767
HLR CLUTCH SOLENOID
P1772
P1772
LC BRAKE SOLENOID
P1774 (*2)
P1774
LC BRAKE SOLENOID
2010 Pathfinder
TM-126
< ECU DIAGNOSIS >
TCM
*1: These numbers are prescribed by SAE J2012.
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.
*3: With instruction mode.
—
P1815
M-MODE SWITCH (*3)·
U1000
U1000
CAN COMM CIRCUIT
DTC
Items
(CONSULT- III screen terms)
Reference page
OBD- II
Except OBD- II
CONSULT- III
GST (*1)
CONSULT- III
only “TRANSMIS-
SION”
2010 Pathfinder
SYSTEM SYMPTOM
TM-127
< SYMPTOM DIAGNOSIS >
C
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A
B
TM
N
O
P
SYMPTOM DIAGNOSIS
SYSTEM SYMPTOM
Symptom Chart
INFOID:0000000005258164
•
The diagnostics item numbers show the sequence for inspection. Inspect in order from item 1.
•
Overhaul and inspect inside the A/T only if A/T fluid condition is NG. Refer to
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
1
Shift
Shock
Large shock. (“N”
→
“
D” position)
ON vehicle
1. Engine idle speed
(VQ40DE)
(VK56DE)
2. Engine speed signal
3. Accelerator pedal position sensor
4. Control cable adjustment
5. ATF temperature sensor
6. Front brake solenoid valve
7. CAN communication line
8. Fluid level and state
9. Line pressure test
10. Control valve with TCM
OFF vehicle
11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
2
Shock is too large
when changing D
1
→
D
2
.
ON vehicle
1. Accelerator pedal position sensor
2. Control cable adjustment
3. Direct clutch solenoid valve
4. CAN communication line
5. Engine speed signal
6. Input speed sensor
7. Output speed sensor and vehicle speed signal
8. Fluid level and state
9. Control valve with TCM
OFF vehicle
10. Direct clutch
3
Shock is too large
when changing D
2
→
D
3
.
ON vehicle
1. Accelerator pedal position sensor
2. Control cable adjustment
3. High and low reverse clutch solenoid valve
4. CAN communication line
5. Engine speed signal
6. Input speed sensor
7. Output speed sensor and vehicle speed signal
8. Fluid level and state
9. Control valve with TCM
OFF vehicle
10. High and low reverse clutch
2010 Pathfinder
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