Infiniti G20 (P11). Manual — part 272
SEF200Y
SEF201Y
PROCEDURE FOR MALFUNCTION B
NCEC0575S02
CAUTION:
Always drive vehicle at a safe speed.
TESTING CONDITION:
Always perform the test at a temperature above –10°C (14°F).
With CONSULT-II
NCEC0575S0201
1)
Start engine and warm it up to normal operating temperature.
2)
Select “EGR VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II.
3)
Hold engine speed at 1,500 rpm.
4)
Touch “Qu” and set the EGR volume control valve opening to
50 step and check EGR TEMP SEN.
EGR TEMP SEN should decrease to less than 1.0V.
If the check result is NG, go to “Diagnostic Procedure”,
EC-501.
If the check result is OK, go to the following step.
5)
Turn ignition switch “OFF” and wait at least 10 seconds then
turn “ON”.
6)
Check the output voltage of “THRTL POS SEN” (at closed
throttle position) and note it.
7)
Start engine and maintain the following conditions for at least
5 consecutive seconds.
ENG SPEED
1,800 - 2,800 rpm
VHCL SPEED SE
10 km/h (6 MPH) or more
B/FUEL SCHDL
5.0 - 8.5 msec
THRTL POS SEN
(X + 0.05) – (X – 0.87) V
X = Voltage value measured at step 6
Selector lever
Suitable position
8)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-501.
SEF066X
With GST
NCEC0575S0202
1)
Start engine and warm it up to normal operating temperature.
2)
Turn ignition switch “OFF” and wait at least 10 seconds, then
turn “ON”.
3)
Select “MODE 1” with GST and maintain the following condi-
tions for at least 5 consecutive seconds.
Engine speed
1,800 - 2,800 rpm
Vehicle speed
10 km/h (6 MPH) or more
Voltage between ECM terminal
92 and ground
0.86 - 2.0V
Selector lever
Suitable position
4)
Select “MODE 7” with GST.
5)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-501.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1401 EGR TEMPERATURE SENSOR
DTC Confirmation Procedure (Cont’d)
EC-499
Wiring Diagram
NCEC0576
TEC719
DTC P1401 EGR TEMPERATURE SENSOR
Wiring Diagram
EC-500
Diagnostic Procedure
NCEC0577
1
CHECK EGR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect EGR temperature sensor harness connector.
SEF849X
3. Turn ignition switch “ON”.
4. Check voltage between EGR temperature sensor terminal 1 and ground with CONSULT-II or tester.
SEF945X
OK or NG
OK
©
GO TO 2.
NG
©
Repair or replace harness or connectors.
2
CHECK EGR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between EGR temperature sensor terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
3
DETECT MALFUNCTIONING PART
Check the following.
I
Harness for open or short between ECM and EGR temperature sensor
I
Harness for open or short between TCM (Transmission Control Module) and EGR temperature sensor
©
Repair open circuit or short to power in harness or connector.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1401 EGR TEMPERATURE SENSOR
Diagnostic Procedure
EC-501
4
CHECK EGR TEMPERATURE SENSOR
1. Remove EGR temperature sensor.
2. Check resistance between EGR temperature sensor terminals 1 and 2 under the following conditions.
SEF919Z
OK or NG
OK
©
GO TO 5.
NG
©
Replace EGR temperature sensor.
DTC P1401 EGR TEMPERATURE SENSOR
Diagnostic Procedure (Cont’d)
EC-502
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