Infiniti G20 (P11). Manual — part 192
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DTC Confirmation Procedure
NCEC0083
Perform “PROCEDURE FOR MALFUNCTION A” first. If the 1st
trip DTC cannot be confirmed, perform “PROCEDURE FOR
MALFUNCTION B”. If there is no problem on “PROCEDURE
FOR MALFUNCTION B”, perform “PROCEDURE FOR MAL-
FUNCTION C”.
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.
PROCEDURE FOR MALFUNCTION A
NCEC0083S01
CAUTION:
Always drive vehicle at a safe speed.
TESTING CONDITION:
I
Before performing the following procedure, confirm that
battery voltage is more than 10V at idle.
I
This test may be conducted with the drive wheels lifted in
the shop or by driving the vehicle. If a road test is
expected to be easier, it is unnecessary to lift the vehicle.
SEF065Y
With CONSULT-II
1)
Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2)
Start engine and maintain the following conditions for at least
5 consecutive seconds.
VHCL SPEED SE
More than 4 km/h (2 MPH)
Selector lever
Suitable position except “P” or “N”
position
3)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-184.
With GST
Follow the procedure “With CONSULT-II” above.
SEF058Y
PROCEDURE FOR MALFUNCTION B
NCEC0083S02
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 10 seconds.
If idle speed is over 1,000 rpm, maintain the following condi-
tions for at least 10 seconds to keep engine speed below 1,000
rpm.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0120 THROTTLE POSITION SENSOR
DTC Confirmation Procedure
EC-179
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A/T model
Selector lever
Suitable position except “P” or
“N” position
Brake pedal
Depressed
Vehicle speed
0 km/h (0 MPH)
M/T model
Selector lever
Suitable position except “N”
(Higher gear position such as
3rd or 4th is better to keep low
engine rpm.)
Accelerator pedal
Released
Vehicle speed
As slow as possible
4)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-184.
With GST
Follow the procedure “With CONSULT-II” above.
SEF177Y
PROCEDURE FOR MALFUNCTION C
NCEC0083S03
CAUTION:
Always drive vehicle at a safe speed.
With CONSULT-II
1)
Start engine and warm it up to normal operating temperature.
2)
Turn ignition switch “OFF” and wait at least 10 seconds.
3)
Turn ignition switch “ON”.
4)
Select “MANU TRIG” in “DATA MONITOR” mode with CON-
SULT-II.
5)
Select “THRTL POS SEN” and “ABSOL TH·P/S” in “DATA
MONITOR” mode with CONSULT-II.
6)
Press RECORD on CONSULT-II SCREEN at the same time
accelerator pedal is depressed.
7)
Print out the recorded graph and check the following:
I
The voltage rise is linear in response to accelerator pedal
depression.
I
The voltage when accelerator pedal is fully depressed is
approximately 4V.
If NG, go to “Diagnostic Procedure”, EC-184.
If OK, go to following step.
DTC P0120 THROTTLE POSITION SENSOR
DTC Confirmation Procedure (Cont’d)
EC-180
![](/vehicles/zatt/wheiso/zix/fot.png)
SEF174Z
SEF178Y
8)
Select “AUTO TRIG” in “DATA MONITOR” mode with CON-
SULT-II.
9)
Maintain the following conditions for at least 10 consecutive
seconds.
ENG SPEED
More than 2,000 rpm
MAS A/F SE-B1
More than 3V
COOLAN TEMP/S
More than 70°C (158°F)
Selector lever
Suitable position
Driving location
Driving vehicle uphill (Increased engine load)
will help maintain the driving conditions
required for this test.
10) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
SEF993W
With GST
1)
Maintain the following conditions for at least 10 consecutive
seconds.
Gear position
Suitable position
Engine speed
More than 2,000 rpm
Engine coolant temperature
More than 70°C (158°F)
Voltage between ECM terminal
61 (Mass air flow sensor sig-
nal) and ground
More than 3V
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0120 THROTTLE POSITION SENSOR
DTC Confirmation Procedure (Cont’d)
EC-181
2)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-184.
DTC P0120 THROTTLE POSITION SENSOR
DTC Confirmation Procedure (Cont’d)
EC-182
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