Nissan Silvia. Manual — part 158
NOTE:
Voltage measurement must be made with throttle position
sensor installed in vehicle.
Throttle valve conditions
Voltage (V)
Completely closed
0.15 - 0.85 (a)
Partially open
Between (a) and (b)
Completely open
3.5 - 4.7 (b)
If NG, adjust closed throttle position switch. Refer to “Basic
Inspection”, EC-50.
6)
If it is impossible to adjust closed throttle position switch in
“Basic Inspection”, replace throttle position sensor.
SEC414C
Without CONSULT-II
1)
Start engine and warm it up to normal operating temperature.
2)
Stop engine (ignition switch OFF).
3)
Turn ignition switch ON.
4)
Check voltage between ECM terminal 20 (Throttle position
sensor signal) and ground under the following conditions.
NOTE:
Voltage measurement must be made with throttle position
sensor installed in vehicle.
Throttle valve conditions
Voltage (V)
Completely closed
0.15 - 0.85 (a)
Partially open
Between (a) and (b)
Completely open
3.5 - 4.7 (b)
If NG, adjust closed throttle position switch. Refer to “Basic
Inspection”, EC-50.
5)
If it is impossible to adjust closed throttle position switch in
“Basic Inspection”, replace throttle position sensor.
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC 0403 THROTTLE POSITION SENSOR
Component Inspection (Cont’d)
EC-147
System Description
NMEC0721
These circuit lines are used to control the smooth shifting up and down of A/T during the hard acceleration/
deceleration. Pulse signals are exchanged between ECM and TCM (Transmission control module).
ECM Terminals and Reference Value
NMEC0722
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM’s transistor. Use a grond other than ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
12
PU/W
A/T signal No. 3
[Engine is running]
I
Idle speed
0 - 0.1V
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
On Board Diagnosis Logic
NMEC0723
DTC No.
Malfunction is detected when ...
Check Items (Possible Cause)
0504
I
ECM receives incorrect voltage from TCM (Transmission
control module) continuously.
I
Harness or connectors
[The circuit between ECM and TCM (Transmis-
sion control module) is open or shorted.]
SEC447C
DTC Confirmation Procedure
NMEC0724
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 5 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V at idle.
With CONSULT-II
1)
Turn ignition switch “ON”.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Start engine, and let it idle for at least 15 seconds.
4)
If DTC is detected, go to “Diagnostic Procedure”, EC-151.
DTC 0504 A/T CONTROL
System Description
EC-148
SEC398C
Overall Function Check
NMEC0818
Use this procedure to check the overall function of the A/T control
circuit. During this check, a DTC might not be confirmed.
Without CONSULT-II
1)
Start engine.
2)
Check voltage between
ECM terminal 44 and ground.
ECM terminal 45 and ground.
Voltage: 6 - 8V
3)
If NG, go to “Diagnostic Procedure”, EC-151.
GI
MA
EM
LC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC 0504 A/T CONTROL
Overall Function Check
EC-149
Wiring Diagram
NMEC0725
TEC806
DTC 0504 A/T CONTROL
Wiring Diagram
EC-150
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