Infiniti M35/M45 Y50. Manual — part 41
TROUBLE DIAGNOSIS
AT-87
D
E
F
G
H
I
J
K
L
M
A
B
AT
64
Others
Extremely large
creep.
ON vehicle
1. Engine idle speed
(for
VQ35DE
engine),
(for
VK45DE
engine)
2. CAN communication line
3. ATF pressure switch 5
OFF vehicle
4. Torque converter
65
With selector lever in
“P” position, vehicle
does not enter parking
condition or, with
selector lever in
another position, park-
ing condition is not
cancelled.
Refer to
“P” Position, Vehicle
Moves When Pushed"
.
ON vehicle
1. PNP switch
2. A/T position
OFF vehicle
3. Parking components
(2WD
models) or
(AWD
models)
66
Vehicle runs with A/T
in “P” position.
ON vehicle
1. PNP switch
2. A/T fluid level and state
3. A/T position
4. Control valve with TCM
OFF vehicle
5. Parking components
(2WD
models) or
(AWD
models)
6. Gear system
67
Vehicle runs with A/T
in “N” position.
Refer to
ON vehicle
1. PNP switch
2. A/T fluid level and state
3. A/T position
4. Control valve with TCM
OFF vehicle
5. Input clutch
6. Gear system
7. Direct clutch
8. Reverse brake
9. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-17, "Cross-Sectional View (VQ35DE Models for 2WD)"
AT-18, "Cross-Sectional View (VK45DE Models for 2WD)"
or
AT-19, "Cross-Sectional View (AWD Models)"
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
"Cross-Sectional View (VQ35DE Models for 2WD)"
"Cross-Sectional View (VK45DE Models for 2WD)"
"Cross-Sectional View (AWD Models)"
No.
Item
Symptom
Condition
Diagnostic Item
Reference
page
AT-88
TROUBLE DIAGNOSIS
68
Others
Engine does not start
in “N” or “P” position.
Refer to
"Engine Cannot Be
Started in “P” or “N”
Position"
ON vehicle
1. Push-button ignition switch and starter
2. A/T position
3. PNP switch
69
Engine starts in posi-
tions other than “N” or
“P”.
ON vehicle
1. Push-button ignition switch and starter
2. A/T position
3. PNP switch
70
Engine stall.
ON vehicle
1. A/T fluid level and state
2. Engine speed signal
3. Turbine revolution sensor
4. Torque converter clutch solenoid valve
5. CAN communication line
6. Control valve with TCM
OFF vehicle
7. Torque converter
71
Engine stalls when
selector lever shifted
“N”
→
“D”or “R”.
ON vehicle
1. A/T fluid level and state
2. Engine speed signal
3. Turbine revolution sensor
4. Torque converter clutch solenoid valve
5. CAN communication line
6. Control valve with TCM
OFF vehicle
7. Torque converter
72
Engine speed does
not return to idle.
Refer to
"Engine Speed Does
Not Return to Idle"
ON vehicle
1. A/T fluid level and state
2. ATF pressure switch 5 and direct clutch solenoid valve
3. ATF pressure switch 1 and front brake solenoid valve
4. Accelerator pedal position sensor
5. Vehicle speed sensor·A/T and vehicle speed sensor·MTR
6. CAN communication line
7. Control valve with TCM
OFF vehicle
8. Front brake (brake band)
9. Direct clutch
No.
Item
Symptom
Condition
Diagnostic Item
Reference
page
TROUBLE DIAGNOSIS
AT-89
D
E
F
G
H
I
J
K
L
M
A
B
AT
TCM Input/Output Signal Reference Values
NCS001KG
A/T ASSEMBLY HARNESS CONNECTOR TERMINAL LAYOUT
TCM INSPECTION TABLE
Data are reference value and are measured between each terminal and ground.
SCIA1658E
Terminal
Wire
color
Item
Condition
Data (Approx.)
1
R/W
Power supply
(Memory back-up)
Always
Battery voltage
2
R/W
Power supply
(Memory back-up)
Always
Battery voltage
3
L
CAN-H
–
–
4
V
K-line (CONSULT-
II signal)
The terminal is connected to the data link connector for CONSULT-II.
–
5
B
Ground
Always
0 V
6
Y/R
Power supply
–
Battery voltage
–
0 V
7
R/L
Back-up lamp
relay
Selector lever in “R” position.
0 V
Selector lever in other positions.
Battery voltage
8
P
CAN-L
–
–
9
GR/R
Starter relay
Selector lever in “N”, “P” positions.
Battery voltage
Selector lever in “R”, “D” positions.
0 V
10
B
Ground
Always
0 V
AT-90
TROUBLE DIAGNOSIS
CONSULT-II Function (A/T)
NCS001KH
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
FUNCTION
CONSULT-II REFERENCE VALUE
NOTICE:
1.
The CONSULT-II electrically displays shift timing and lock-up timing (that is, operation timing of each sole-
noid).
Check for time difference between actual shift timing and the CONSULT-II display. If the difference is
noticeable, mechanical parts (except solenoids, sensors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.
2.
Shift schedule (which implies gear position) displayed on CONSULT-II and that indicated in Service Man-
ual may differ slightly. This occurs because of the following reasons:
–
Actual shift schedule has more or less tolerance or allowance,
–
Shift schedule indicated in Service Manual refers to the point where shifts start, and
–
Gear position displayed on CONSULT-II indicates the point where shifts are completed.
3.
Display of solenoid valves on CONSULT-II changes at the start of shifting, while gear position is displayed
upon completion of shifting (which is computed by TCM).
Diagnostic test mode
Function
Reference page
Self-diagnostic results
Self-diagnostic results can be read and erased quickly.
Data monitor
Input/Output data in the ECU can be read.
CAN diagnostic support
monitor
The results of transmit/receive diagnosis of CAN communication can be read.
Function test
Performed by CONSULT-II instead of a technician to determine whether each system
is “OK” or “NG”.
—
DTC work support
Select the operating condition to confirm Diagnostic Trouble Codes.
ECU part number
ECU part number can be read.
—
Item name
Condition
Display value
(Approx.)
VHCL/S SE-A/T
During driving
Approximately
matches the speed
meter reading.
VHCL/S SE-MTR
ACCELE POSI
Released accelerator pedal.
0.0/8
Fully depressed accelerator pedal.
8.0/8
CLSD THL POS
Released accelerator pedal.
ON
Fully depressed accelerator pedal.
OFF
W/O THL POS
Fully depressed accelerator pedal.
ON
Released accelerator pedal.
OFF
BRAKE SW
Depressed brake pedal.
ON
Released brake pedal.
OFF
ENGINE SPEED
Engine running
Closely matches the
tachometer reading.
TURBINE REV
During driving (lock-up ON)
Approximately
matches the engine
speed.
ATF TEMP SE 1
0
°
C (32
°
F) - 20
°
C (68
°
F) - 80
°
C (176
°
F)
3.3 - 2.7 - 0.9 V
ATF TEMP SE 2
3.3 - 2.5 - 0.7 V
TCC SOLENOID
Lock-up is active
0.4 - 0.6 A
LINE PRES SOL
During driving
0.2 - 0.6 A
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