Nissan Silvia. Manual — part 21
Items
Symptom
Condition
Diagnostic Item
Reference Page
NOT USED
Transmission
overheats.
ON vehicle
1. Fluid level
2. Engine idling rpm
EC-50, “Basic Inspec-
tion”.
3. Throttle position sensor (Adjustment)
EC-50, “Basic Inspec-
tion”.
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
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
GI
MA
EM
LC
EC
FE
CL
MT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Symptom Chart (Cont’d)
AT-81
AAT475A
TCM Terminals and Reference Value
=NMAT0027
PREPARATION
NMAT0027S01
I
Measure voltage between each terminal and terminal 25 or 48
by following “TCM INSPECTION TABLE”.
SAT217JD
TCM HARNESS CONNECTOR TERMINAL LAYOUT
NMAT0027S02
TCM INSPECTION TABLE
NMAT0027S03
(Data are reference values.)
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
1
OR/B
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
P
Line pressure
solenoid valve
(with dropping
resistor)
When releasing accelerator pedal after warm-
ing up engine.
5 - 14V
When depressing accelerator pedal fully after
warming up engine.
0V
3
BR/R
Torque converter
clutch solenoid
valve
When A/T performs lock-up.
8 - 15V
When A/T does not perform lock- up.
0V
4
—
—
—
—
5*1
L/OR
DT1
—
—
6*1
L/W
DT2
—
—
7*1
PU/W
DT3
—
—
8
—
—
—
—
9
—
—
—
—
10
G/OR
Power source
When turning ignition switch to “ON”.
Battery volt-
age
When turning ignition switch to “OFF”.
0V
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
TCM Terminals and Reference Value
AT-82
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
11
R/W
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
OR/L
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
POWER indicator
lamp
When setting A/T mode switch in “POWER”
position.
Battery volt-
age
When setting A/T mode switch in other posi-
tion.
0V
14
R/G
ND
—
—
15
—
—
—
—
16
LG
Closed throttle
position switch
(in throttle posi-
tion switch)
When releasing accelerator pedal after warm-
ing up engine.
Battery volt-
age
When depressing accelerator pedal after
warming up engine.
0V
17
R
Wide open
throttle position
switch
(in throttle posi-
tion 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
—
—
—
—
19
G/OR
Power source
Same as No. 10
20
P/L
Overrun clutch
solenoid valve
When overrun clutch solenoid valve operates.
Battery volt-
age
When overrun clutch solenoid valve does not
operate.
0V
21
—
—
—
—
22
L/B
Overdrive control
switch
When setting overdrive control switch in “ON”
position
Battery volt-
age
When setting overdrive control switch in
“OFF” position
0V
23
—
—
—
—
GI
MA
EM
LC
EC
FE
CL
MT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
TCM Terminals and Reference Value (Cont’d)
AT-83
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
24
—
—
—
—
25
B
Ground
—
0V
26
P
PNP switch “1”
position
When setting selector lever to “1” position.
Battery volt-
age
When setting selector lever to other positions.
0V
27
LG
PNP switch “2”
position
When setting selector lever to “2” position.
Battery volt-
age
When setting selector lever to other positions.
0V
28
R/W
Power source
(Memory back-up)
or
When turning ignition switch to “OFF”.
Battery volt-
age
When turning ignition switch to “ON”.
Battery volt-
age
29
W
Revolution sensor
(Measure in AC
range)
When vehicle cruises at 30 km/h (19 MPH).
1V or more
Voltage rises
gradually in
response to
vehicle speed.
When vehicle parks.
0V
30*2
G/B
—
—
—
31*2
SB
—
—
—
32
LG/R
Throttle position
sensor
(Power source)
Ignition switch “ON”.
4.5 - 5.5V
Ignition switch “OFF”.
0V
33
—
—
—
—
34
LG/B
PNP switch “D”
position
When setting selector lever to “D” position.
Battery volt-
age
When setting selector lever to other positions.
0V
35
PU
PNP switch “R”
position
When setting selector lever to “R” position.
Battery volt-
age
When setting selector lever to other positions.
0V
36
GY
PNP switch “N” or
“P” position
When setting selector lever to “N” or “P” posi-
tion.
Battery volt-
age
When setting selector lever to other positions.
0V
37
—
—
—
—
38
—
—
—
—
39
L/OR
Engine speed
signal
Refer to EC-76, “ECM Inspection Table”.
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
TCM Terminals and Reference Value (Cont’d)
AT-84
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