Nissan Silvia. Manual — part 141
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
28
R/Y
Throttle position sensor
signal output
[Engine is running]
I
Warm-up condition
I
Accelerator pedal fully released
Approximately 0.4V
[Ignition switch “ON”]
I
Accelerator pedal fully depressed
Approximately 3.0V
30
B/Y
Camshaft position sen-
sor (Position signal)
[Engine is running]
I
Warm-up condition
I
Idle speed
Approximately 2.5V
SEC364C
[Engine is running]
I
Warm-up condition
I
Engine speed is 2,000 rpm.
Approximately 2.4V
SEC365C
31
LG
Camshaft position sen-
sor (Reference signal)
[Engine is running]
I
Warm-up condition
I
Idle speed
0.4 - 0.8V
SEC366C
[Engine is running]
I
Warm-up condition
I
Engine speed is 2,000 rpm.
Approximately 0.6V
SEC367C
32
W/PU
Vehicle speed sensor
[Engine is running]
I
Lift up the vehicle
I
Vehicle speed is 40 km/h (25 MPH).
2.0 - 3.0V
SEC368C
33
PU
(With A/T)
G/R
(With
M/T)
Electrical load signal
(Headlamp and Rear
defogger)
[Engine is running]
I
Lighting switch is “2ND” and/or rear defogger
switch is “ON”.
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
I
Lighting switch and rear defogger switch are
“OFF”.
Approximately 0V
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ECM Terminals and Reference Value (Cont’d)
EC-79
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
34
OR/L
Start signal
[Ignition switch “ON”]
Approximately 0V
[Ignition switch “START”]
9 - 12V
35
R/G
(With A/T)
G/OR
(With
M/T)
PNP switch
[Ignition switch “ON”]
I
Selector lever “P” or “N” position
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch “ON”]
I
Except the above position
Approximately 0V
36
B/R
Ignition switch
[Ignition switch “OFF”]
Approximately 0V
[Ignition switch “ON”]
BATTERY VOLTAGE
(11 - 14V)
37
LG/R
Sensor’s power supply
[Ignition switch “ON”]
Approximately 5V
38
47
B/W
B/W
Power supply for ECM
[Ignition switch “ON”]
BATTERY VOLTAGE
(11 - 14V)
39
48
B
B
ECM ground
[Engine is running]
I
Idle speed
Engine ground
41
L/B
Air conditioner switch
[Engine is running]
I
Both A/C switch and blower fan switch are “ON”
(Compressor is operating).
0 - 1.0V
[Engine is running]
I
A/C switch is “OFF”.
BATTERY VOLTAGE
(11 - 14V)
43
PU/W
Power steering oil
pressure switch
[Engine is running]
I
Steering wheel is fully turned.
Approximately 0V
[Engine is running]
I
Steering wheel is not turned.
Approximately 5V
44
L/W
A/T signal No. 2
[Engine is running]
I
Idle speed
6 - 8V
45
L/OR
A/T signal No. 1
[Engine is running]
I
Idle speed
6 - 8V
46
109
W
W
Power supply for ECM
(Back-up)
[Ignition switch “OFF”]
BATTERY VOLTAGE
(11 - 14V)
101
103
110
112
W/G
G/B
L/R
L/B
Injector No. 1
Injector No. 3
Injector No. 2
Injector No. 4
[Engine is running]
I
Warm-up condition
I
Idle speed
BATTERY VOLTAGE
(11 - 14V)
SEC369C
[Engine is running]
I
Warm-up condition
I
Engine speed is 2,000 rpm.
BATTERY VOLTAGE
(11 - 14V)
SEC371C
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ECM Terminals and Reference Value (Cont’d)
EC-80
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
105
R/L
Intake valve timing
control solenoid valve
[Engine is running]
I
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
I
Lift up the vehicle.
I
Shift lever to any position except “P” or “N” posi-
tion
I
Engine speed 2,000 rpm
0 - 1.0V
106
B/P
Fuel pump relay
[Ignition switch “ON”]
I
For 1 second after turning ignition switch “ON”
[Engine is running]
0 - 1.0V
[Ignition switch “ON”]
I
More than 1 second after turning ignition switch
“ON”
BATTERY VOLTAGE
(11 - 14V)
107
108
116
B
B
B
ECM ground
[Engine is running]
I
Idle speed
Engine ground
111
B/R
Heated oxygen sensor
1 heater (front)
[Engine is running]
I
Engine speed is below 4,400 rpm.
Approximately 0V
[Engine is running]
I
Engine speed is above 4,400 rpm.
BATTERY VOLTAGE
(11 - 14V)
113
SB
IACV-AAC valve
[Engine is running]
I
Warm-up condition
I
Idle speed
Approximately 10V
SEC372C
[Engine is running]
I
Warm-up condition
I
Idle speed
I
Both A/C switch and blower fan switch are “ON”
(Compressor is operating).
I
Rear window defogger switch is “ON”
Approximately 11V
SEC373C
115
OR/B
Wastegate valve con-
trol solenoid valve
[Engine is running]
I
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
I
Engine speed is 2,000 rpm.
BATTERY VOLTAGE
(11 - 14V)
SEC374C
★
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ECM Terminals and Reference Value (Cont’d)
EC-81
Description
NMEC0045
Intermittent incidents (I/I) may occur. In many cases, the problem resolves itself (the part or circuit function
returns to normal without intervention). It is important to realize that the symptoms described in the custom-
er’s complaint often do not recur on DTC visits. Realize also that the most frequent cause of I/I occurrences
is poor electrical connections. Because of this, the conditions under which the incident occurred may not be
clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not indicate the spe-
cific problem area.
COMMON I/I REPORT SITUATIONS
NMEC0045S01
STEP in Work Flow
Situation
II
The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than “0”.
III
The symptom described by the customer does not recur.
IV
DTC does not appear during the DTC Confirmation Procedure.
VI
The Diagnostic Procedure for XXXX does not indicate the problem area.
Diagnostic Procedure
NMEC0046
1
INSPECTION START
Erase DTCs. Refer to “HOW TO ERASE DTC”, EC-33.
©
GO TO 2.
2
CHECK GROUND TERMINALS
Check ground terminals for corroding or loose connection.
Refer to GI-26, “GROUND INSPECTION”.
OK or NG
OK
©
GO TO 3.
NG
©
Repair or replace.
3
SEARCH FOR ELECTRICAL INCIDENT
Perform GI-21, “Incident Simulation Tests”.
OK or NG
OK
©
INSPECTION END
NG
©
Repair or replace.
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
Description
EC-82
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