Infiniti Q45 (FY33). Manual — part 42
SAT579I
5. Large Shock. “N”
→
“R” Position
SYMPTOM:
There is large shock when changing from “N” to “R” position.
SAT559I
SAT494G
Does self-diagnosis show damage to A/T
fluid temperature sensor, line pressure
solenoid valve or throttle position sensor
circuit?
No
E
Yes
Check damaged circuit.
Refer to “DTC P0710,
P0745 or P1705”, AT-85,
or 137.
Check throttle position sensor. Refer to
EC section [“Throttle Position Sensor
(DTC: 0403)”, “TROUBLE DIAGNOSIS
FOR DTC P0120”].
OK
E
NG
Repair or replace throttle
position sensor.
Check line pressure at idle with selector
lever in “D” position. Refer to “LINE
PRESSURE TEST”, AT-62.
OK
E
NG
1. Remove control valve
assembly. Refer to
AT-195.
2. Check the following
items:
I
Valves to control line
pressure (Pressure regu-
lator valve, pressure
modifier valve, pilot valve
and pilot filter)
I
Line pressure solenoid
valve
Check again.
OK
E
NG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
H
H
H
H
H
AT-165
SAT638A
6. Vehicle Does Not Creep Backward In “R”
Position
SYMPTOM:
Vehicle does not creep backward when selecting “R” position.
SAT493G
SAT494G
SAT171B
Check A/T fluid level again.
OK
E
NG
Refill ATF.
q
A
NG in both “1”
and “R” positions
Check stall revolution with selector lever
in “1” and “R” positions.
OK
OK in “1” position
NG in “R” position
E
1. Remove control valve
assembly. Refer to “ON-
VEHICLE SERVICE”,
AT-195.
2. Check the following
items:
I
Valves to control line
pressure (Pressure regu-
lator valve, pressure
modifier valve, pilot valve
and pilot filter)
I
Line pressure solenoid
valve
3. Disassemble A/T.
4. Check the following
items:
I
Oil pump assembly
I
Torque converter
I
Reverse clutch assembly
I
High clutch assembly
I
Low & reverse brake
assembly
I
Low one-way clutch
1. Remove control valve assembly.
Refer to “ON-VEHICLE
SERVICE”, AT-195.
2. Check the following items:
I
Valves to control line pressure
(Pressure regulator valve, pres-
sure modifier valve, pilot valve
and pilot filter)
I
Line pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
I
Oil pump assembly
I
Torque converter
I
Reverse clutch assembly
I
High clutch assembly
Check line pressure at idle with selector
lever in “R” position. Refer to “LINE
PRESSURE TEST”, AT-62.
OK
E
NG
1. Remove control valve
assembly. Refer to “ON-
VEHICLE SERVICE”,
AT-195.
2. Check the following
items:
I
Valves to control line
pressure (Pressure regu-
lator valve, pressure
modifier valve, pilot valve
and pilot filter)
I
Line pressure solenoid
valve
3. Disassemble A/T.
4. Check the following
item:
I
Oil pump assembly
1. Remove oil pan.
2. Check A/T fluid condition.
NG
OK
q
A
Check again.
OK
E
NG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
TROUBLE DIAGNOSES FOR SYMPTOMS
H
H
H
H
H
H
H
H
AT-166
SAT638A
7. Vehicle Does Not Creep Forward In “D”, “2”
Or “1” Position
SYMPTOM:
Vehicle does not creep forward when selecting “D”, “2” or “1”
position.
SAT493G
SAT494G
SAT171B
Check A/T fluid level again.
OK
E
NG
Refill ATF.
q
A
Check stall revolution with selector lever in
“D” position. Refer to “STALL TEST”, AT-59.
OK
E
NG
1. Remove control valve
assembly. Refer to
AT-195.
2. Check the following
items:
I
Valves to control line
pressure (Pressure
regulator valve, pres-
sure modifier valve,
pilot valve and pilot
filter)
I
Line pressure sole-
noid valve
3. Disassemble A/T.
4. Check the following
items:
I
Oil pump assembly
I
Forward clutch
assembly
I
Forward one-way
clutch
I
Low one-way clutch
I
Low & reverse brake
assembly
I
Torque converter
Check line pressure at idle with selector lever
in “D” position. Refer to “LINE PRESSURE
TEST”, T-62.
OK
NG
1. Remove control valve assembly.
Refer to AT-195.
2. Check the following items:
I
Valves to control line pressure
(Pressure regulator valve, pressure
modifier valve, pilot valve and pilot
filter)
I
Line pressure solenoid valve
3. Disassemble A/T.
4. Check the following item:
I
Oil pump assembly
1. Remove oil pan.
2. Check A/T fluid condition.
OK
E
NG
q
A
Check again.
OK
E
NG
1. Perform TCM input/
output signal inspec-
tion.
2. If NG, recheck TCM
pin terminals for
damage or loose
connection with har-
ness connector.
INSPECTION END
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
H
H
H
H
H
H
H
H
AT-167
SAT686I
8. Vehicle Cannot Be Started From D
1
SYMPTOM:
Vehicle cannot be started from D
1
on Cruise test — Part 1.
SAT559I
SAT494G
SAT171B
Is 6. Vehicle Does Not Creep Backward In
“R” Position OK?
Yes
E
No
Go to 6. Vehicle Does Not
Creep Backward In “R”
Position, AT-166.
Does self-diagnosis show damage to
vehicle speed sensor
⋅
A/T (revolution
sensor), shift solenoid valve A, B or
vehicle speed sensor
⋅
MTR after cruise
test?
No
E
Yes
Check damaged circuit.
Refer to “DTC P0720,
P0750, P0755 or VHCL
SPEED SEN
⋅
MTR”, AT-89,
Check throttle position sensor. Refer to
EC section [“Throttle Position Sensor
(DTC: 0403)”, “TROUBLE DIAGNOSIS
FOR DTC P0120”].
OK
E
NG
Repair or replace throttle
position sensor.
Check line pressure at stall point with
selector lever in “D” position. Refer to
“LINE PRESSURE TEST”, AT-62.
OK
E
NG
1. Remove control valve
assembly. Refer to
AT-195.
2. Check the following
items:
I
Shift valve A
I
Shift valve B
I
Shift solenoid valve A
I
Shift solenoid valve B
I
Pilot valve
I
Pilot filter
3. Disassemble A/T.
4. Check the following
items:
I
Forward clutch assembly
I
Forward one-way clutch
I
Low one-way clutch
I
High clutch assembly
I
Torque converter
I
Oil pump assembly
1. Remove oil pan.
2. Check A/T fluid condition.
OK
E
NG
1. Remove control valve assembly. Refer
to AT-195.
2. Check the following items:
I
Shift valve A
I
Shift valve B
I
Shift solenoid valve A
I
Shift solenoid valve B
I
Pilot valve
I
Pilot filter
OK
OK
F
Check again.
OK
E
NG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
TROUBLE DIAGNOSES FOR SYMPTOMS
H
H
H
H
H
H
H
H
AT-168
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