Infiniti G20 (P11). Manual — part 260
8
ADJUST THROTTLE POSITION SWITCH
Check the following items. Refer to “Basic Inspection”, EC-107.
MTBL0518
Is it possible to adjust closed throttle position switch?
Yes or No
Yes (With CONSULT-II)
©
GO TO 9.
Yes (Without CONSULT-
II)
©
GO TO 10.
No
©
Replace throttle position switch.
9
CHECK THROTTLE POSITION SENSOR
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine (ignition switch OFF).
3. Remove the vacuum hose connected to the throttle opener.
4. Connect suitable vacuum hose to the vacuum pump and the opener.
5. Apply vacuum [more than −40.0 kPa (−300 mmHg, −11.81 inHg)] until the throttle drum becomes free from the rod of
the throttle opener.
SEF793W
6. Turn ignition switch ON.
7. Select “DATA MONITOR” mode with CONSULT-II.
8. Check voltage of “THRTL POS SEN” under the following conditins.
Voltage measurement must be made with throttle position sensor installed in vehicle.
MTBL0230
OK or NG
OK
©
GO TO 11.
NG
©
Replace throttle position sensor.
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DTC P0510 CLOSED THROTTLE POSITION SWITCH
Diagnostic Procedure (Cont’d)
EC-451
10
CHECK THROTTLE POSITION SENSOR
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine (ignition switch OFF).
3. Remove the vacuum hose connected to the throttle opener.
4. Connect suitable vacuum hose to the vacuum pump and the opener.
5. Apply vacuum [more than −40.0 kPa (−300 mmHg, −11.81 inHg)] until the throttle drum becomes free from the rod of
the throttle opener.
SEF793W
6. Turn ignition switch ON.
7. Check voltage between ECM terminal 92 (Throttle position sensor signal) and ground.
Voltage measurement must be made with throttle position sensor installed in vehicle.
SEF526Z
OK or NG
OK
©
GO TO 11.
NG
©
Replace throttle position sensor.
11
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-146.
©
INSPECTION END
DTC P0510 CLOSED THROTTLE POSITION SWITCH
Diagnostic Procedure (Cont’d)
EC-452
System Description
NCEC0494
These circuit lines are used to control the smooth shifting up and down of A/T during the hard acceleration/
deceleration. Voltage signals are exchanged between ECM and TCM (Transmission control module).
ECM Terminals and Reference Value
NCEC0495
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 ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
10
Y/B
A/T signal No. 3
[Engine is running]
I
Idle speed
0 - 1.0V
19
BR/W
A/T signal No. 5
[Engine is running]
I
Idle speed
Approximately 8V
54
Y/R
A/T signal No. 1
[Engine is running]
I
Idle speed
Approximately 0 - 1.0V
55
Y/G
A/T signal No. 2
[Engine is running]
I
Idle speed
Approximately 0 - 1.0V
56
G/Y
A/T signal No. 4
[Engine is running]
I
Idle speed
Approximately 0 - 1.0V
On Board Diagnosis Logic
NCEC0496
DTC No.
Malfunction is detected when ...
Check Items (Possible Cause)
P0600*
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.]
*: This DTC can be detected only by “DATA MONITOR (AUTO TRIG)” with CONSULT-II.
SEF058Y
DTC Confirmation Procedure
NCEC0497
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
With CONSULT-II
1)
Turn ignition switch “ON”.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Wait at least 10 seconds.
4)
If DTC is detected, go to “Diagnostic Procedure”, EC-455.
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LC
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DTC P0600 A/T CONTROL
System Description
EC-453
Wiring Diagram
NCEC0499
TEC717
DTC P0600 A/T CONTROL
Wiring Diagram
EC-454
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