Infiniti I30 (A33). Manual — part 24
Items
Symptom
Condition
Diagnostic Item
Reference Page
NOT USED
Maximum speed
not attained.
Acceleration poor.
ON vehicle
1. Fluid level
2. Park/neutral position (PNP) switch
adjustment
3. Shift solenoid valve A
4. Shift solenoid valve B
5. Control valve assembly
OFF vehicle
6. Reverse clutch
7. High clutch
8. Brake band
9. Low & reverse brake
10. Oil pump
11. Torque converter
Transaxle noise in
D, 2, 1 and R
positions.
ON vehicle
1. Fluid level
ON vehicle
2. Torque converter
Engine brake
does not operate
in “1” position.
AT-256
ON vehicle
1. Park/neutral position (PNP) switch
adjustment
2. Control cable adjustment
3. Throttle position sensor (Adjustment)
4. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTR
5. Shift solenoid valve A
6. Control valve assembly
7. Overrun clutch solenoid valve
OFF vehicle
8. Overrun clutch
9. Low & reverse brake
Transaxle over-
heats.
ON vehicle
1. Fluid level
2. Engine idling rpm
3. Throttle position sensor (Adjustment)
4. Line pressure test
5. Line pressure solenoid valve
6. Control valve assembly
OFF vehicle
7. Oil pump
8. Reverse clutch
9. High clutch
10. Brake band
11. Forward clutch
12. Overrun clutch
13. Low & reverse brake
14. Torque converter
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Symptom Chart (Cont’d)
AT-93
Items
Symptom
Condition
Diagnostic Item
Reference Page
NOT USED
ATF shoots out
during operation.
White smoke
emitted from
exhaust pipe dur-
ing operation.
ON vehicle
1. Fluid level
OFF vehicle
2. Reverse clutch
3. High clutch
4. Brake band
5. Forward clutch
6. Overrun clutch
7. Low & reverse brake
Offensive smell at
fluid charging
pipe.
ON vehicle
1. Fluid level
OFF vehicle
2. Torque converter
3. Oil pump
4. Reverse clutch
5. High clutch
6. Brake band
7. Forward clutch
8. Overrun clutch
9. Low & reverse brake
Engine is stopped
at R, D, 2 and 1
positions.
ON vehicle
1. Fluid level
2. Torque converter clutch solenoid valve
3. Shift solenoid valve B
4. Shift solenoid valve A
5. Control valve assembly
AAT475A
TCM Terminals and Reference Value
NHAT0031
PREPARATION
NHAT0031S01
I
Measure voltage between each terminal and terminal 25 or 48
by following “TCM INSPECTION TABLE”.
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Symptom Chart (Cont’d)
AT-94
TCM HARNESS CONNECTOR TERMINAL LAYOUT
NHAT0031S02
SAT338JA
TCM INSPECTION TABLE
NHAT0031S03
(Data are reference values.)
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
1
G/R
Line pressure
solenoid valve
When releasing accelerator pedal after warm-
ing up engine.
1.5 - 3.0V
When depressing accelerator pedal fully after
warming up engine.
0V
2
W/B
Line pressure sole-
noid valve
(with dropping
resistor)
When releasing accelerator pedal after warm-
ing up engine.
4 - 14V
When depressing accelerator pedal fully after
warming up engine.
0V
3
G/B
Torque converter
clutch solenoid
valve
When A/T performs lock-up.
8 - 15V
When A/T does not perform lock-up.
0V
10
R/Y
Power source
or
When turning ignition switch to ON.
Battery volt-
age
When turning ignition switch to OFF.
0V
11
R/Y
Shift solenoid valve
A
When shift solenoid valve A operates.
(When driving in D
1
or D
4
.)
Battery volt-
age
When shift solenoid valve A does not operate.
(When driving in D
2
or D
3
.)
0V
12
LG/B
Shift solenoid valve
B
When shift solenoid valve B operates.
(When driving in D
1
or D
2
.)
Battery volt-
age
When shift solenoid valve B does not operate.
(When driving in D
3
or D
4
.)
0V
13
G/Y
O/D OFF indicator
lamp
When setting overdrive control switch in OFF
position.
0V
When setting overdrive control switch in ON
position.
Battery volt-
age
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
TCM Terminals and Reference Value (Cont’d)
AT-95
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
16
GY/L
Closed throttle
position switch
(in throttle position
switch)
When releasing accelerator pedal after warm-
ing up engine.
Battery volt-
age
When depressing accelerator pedal after
warming up engine.
0V
17
P
Wide open throttle
position switch
(in throttle position
switch)
When depressing accelerator pedal more than
half-way after warming up engine.
Battery volt-
age
When releasing accelerator pedal after warm-
ing up engine.
0V
18
Y
ASCD cruise switch
When ASCD cruise is being performed.
(“CRUISE” lamp comes on.)
Battery volt-
age
When ASCD cruise is not being performed.
(“CRUISE” lamp does not comes on.)
0V
19
R/Y
Power source
Same as No. 10
20
BR/Y
Overrun clutch
solenoid valve
When overrun clutch solenoid valve operates.
Battery volt-
age
When overrun clutch solenoid valve does not
operate.
0V
22
G/Y
Overdrive control
switch
When setting overdrive control switch in ON
position
Battery volt-
age
When setting overdrive control switch in OFF
position
0V
24
L
ASCD OD cut sig-
nal
When “ACCEL” set switch on ASCD cruise is
in D
4
position.
5 - 10V
When “ACCEL” set switch on ASCD cruise is
in D
3
position.
Less than
2V
25
B
Ground
—
—
—
26
PU/W
PNP switch 1 posi-
tion
When setting selector lever to 1 position.
Battery volt-
age
When setting selector lever to other positions.
0V
27
P/B
PNP switch 2 posi-
tion
When setting selector lever to 2 position.
Battery volt-
age
When setting selector lever to other positions.
0V
28
Y/R
Power source
(Memory back-up)
or
When turning ignition switch to OFF.
Battery volt-
age
When turning ignition switch to ON.
Battery volt-
age
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
TCM Terminals and Reference Value (Cont’d)
AT-96
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