Nissan Pathfinder (2008 year). Manual — part 597
TM-118
< ECU DIAGNOSIS >
TCM
ALDIA0075GB
TCM
TM-119
< ECU DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
ALDIA0076GB
TM-120
< ECU DIAGNOSIS >
TCM
ALDIA0077GB
TCM
TM-121
< ECU DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Fail-Safe
INFOID:0000000001282744
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
ALDIA0128GB
TM-122
< 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.
Vehicle Speed Sensor
• Signals are input from two systems - from vehicle speed sensor A/T (revolution sensor) installed on the
transmission and from combination meter so normal driving is possible even if there is a malfunction in one
of the systems. And if vehicle speed sensor A/T (revolution sensor) has unusual cases, 5th gear is prohib-
ited.
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.
PNP 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.)
A/T Interlock
• If there is an A/T interlock judgment malfunction, the transmission is fixed in 2nd gear to make driving possi-
ble.
NOTE:
When the vehicle is driven fixed in 2nd gear, a turbine revolution sensor malfunction is displayed,
but this is not a turbine revolution sensor malfunction.
• When the coupling pattern below is detected, the fail-safe action corresponding to the pattern is performed.
A/T INTERLOCK COUPLING PATTERN TABLE
●
: NG X: OK
A/T 1st Engine Braking
• When there is an A/T first gear 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.
Gear position
ATF pressure switch output
Fail-safe
function
Clutch pressure output pattern after fail-safe func-
tion
SW3
(I/C)
SW6
(HLR/
C)
SW5
(D/C)
SW1
(FR/B)
SW2
(LC/B)
I/C
HLR/C
D/C
FR/B
LC/B
L/U
A/T interlock
coupling pat-
tern
3rd
–
X
X
–
●
Held in
2nd gear
OFF
OFF
ON
OFF
OFF
OFF
4th
–
X
X
–
●
Held in
2nd gear
OFF
OFF
ON
OFF
OFF
OFF
5th
X
X
–
X
●
Held in
2nd gear
OFF
OFF
ON
OFF
OFF
OFF
TCM
TM-123
< ECU DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Low Coast Brake Solenoid
• When a (electrical or functional) malfunction occurs, in order to make driving possible, the engine brake is
not applied in 1st and 2nd gear.
Input Clutch Solenoid
• If a (electrical or functional) malfunction occurs with the solenoid either “ON” or “OFF”, the transmission is
held in 4th gear 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 4th gear 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 5th gear; if the solenoid is OFF, 4th gear.
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 4th gear to make driving possible.
Turbine Revolution Sensor 1 or 2
• The control is the same as if there were no turbine revolution sensors, 5th gear is prohibited.
DTC Inspection Priority Chart
INFOID:0000000001282743
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:0000000001282718
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 communication line
2
Except above
DTC
Items
(CONSULT- III screen terms)
Reference page
OBD- II
Except OBD- II
CONSULT- III
GST (*1)
CONSULT- III
only “A/T”
—
P0615
STARTER RELAY/CIRC
P0700
P0700
TCM
P0705
P0705
PNP SW/CIRC
P0710
P1710
ATF TEMP SEN/CIRC
P0717
P0717
TURBINE REV S/CIRC
P0720
P0720
VEH SPD SEN/CIR AT
—
P0725
ENGINE SPEED SIG
P0731
P0731
A/T 1ST GR FNCTN
P0732
P0732
A/T 2ND GR FNCTN
P0733
P0733
A/T 3RD GR FNCTN
P0734
P0734
A/T 4TH GR FNCTN
P0735
P0735
A/T 5TH GR FNCTN
P0740
P0740
TCC SOLENOID/CIRC
TM-124
< 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 manual mode.
Alphabetical Index
INFOID:0000000001282717
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
P0744 (*2)
P0744
A/T TCC S/V FNCTN
P0745
P0745
L/PRESS SOL/CIRC
—
P1705
TP SEN/CIRC A/T
—
P1721
VEH SPD SE/CIR·MTR
P1730
P1730
A/T INTERLOCK
—
P1731
A/T 1ST E/BRAKING
P1752
P1752
I/C SOLENOID/CIRC
P1757
P1757
FR/B SOLENOID/CIRC
P1762
P1762
D/C SOLENOID/CIRC
P1767
P1767
HLR/C SOL/CIRC
P1772
P1772
LC/B SOLENOID/CIRC
P1774 (*2)
P1774
LC/B SOLENOID FNCT
—
P1815
MANU MODE SW/CIR (*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 “A/T”
Items
(CONSULT- III screen terms)
DTC
Reference page
OBD- II
Except OBD- II
CONSULT- III GST (*1)
CONSULT- III only “A/T”
A/T 1ST E/BRAKING
—
P1731
A/T 1ST GR FNCTN
P0731
P0731
A/T 2ND GR FNCTN
P0732
P0732
A/T 3RD GR FNCTN
P0733
P0733
A/T 4TH GR FNCTN
P0734
P0734
A/T 5TH GR FNCTN
P0735
P0735
A/T INTERLOCK
P1730
P1730
A/T TCC S/V FNCTN
P0744 (*2)
P0744
ATF TEMP SEN/CIRC
P0710
P1710
CAN COMM CIRCUIT
U1000
U1000
D/C SOLENOID/CIRC
P1762
P1762
ENGINE SPEED SIG
—
P0725
FR/B SOLENOID/CIRC
P1757
P1757
HLR/C SOL/CIRC
P1767
P1767
I/C SOLENOID/CIRC
P1752
P1752
L/PRESS SOL/CIRC
P0745
P0745
LC/B SOLENOID/CIRC
P1772
P1772
TCM
TM-125
< ECU DIAGNOSIS >
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
*1: These numbers are prescribed by SAE J2012.
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.
*3: With manual mode.
LC/B SOLENOID FNCT
P1774 (*2)
P1774
MANU MODE SW/CIR (*3)
—
P1815
PNP SW/CIRC
P0705
P0705
STARTER RELAY/CIRC
—
P0615
TCC SOLENOID/CIRC
P0740
P0740
TCM
P0700
P0700
TP SEN/CIRC A/T
—
P1705
TURBINE REV S/CIRC
P0717
P0717
VEH SPD SE/CIR·MTR
—
P1721
VEH SPD SEN/CIR AT
P0720
P0720
Items
(CONSULT- III screen terms)
DTC
Reference page
OBD- II
Except OBD- II
CONSULT- III GST (*1)
CONSULT- III only “A/T”
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