Infiniti Q45 (FY33). Manual — part 201
SEC050C
AEC783A
EVAP canister vent control valve
Check air passage continuity.
Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
Condition
Air passage continuity
between
q
A
and
q
B
ON
No
OFF
Yes
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Condition
Air passage continuity
between
q
A
and
q
B
12V direct current supply between ter-
minals
q
1
and
q
2
No
No supply
Yes
If NG or operation takes more than 1 second, clean valve using air
blower or replace as necessary.
If portion
q
B
is rusted, replace control valve.
Make sure new O-ring is installed properly.
SEF747W
Absolute pressure sensor
1.
Remove absolute pressure sensor with its harness connector
connected.
2.
Remove hose from absolute pressure sensor.
3.
Turn ignition switch “ON” and check output voltage between
ECM terminal
q
64
and engine ground.
The voltage should be 3.2 to 4.8V.
4.
Use pump to apply vacuum of −26.7 kPa (−200 mmHg, −7.87
inHg) to absolute pressure sensor as shown in figure and
check the output voltage.
The voltage should be 1.0 to 1.4V lower than the value
measured in step 3.
CAUTION:
I
Always calibrate the vacuum pump gauge when using it.
I
Do not apply vacuum below −93.3 kPa (−700 mmHg,
−27.56 inHg) or pressure over 101.3 kPa (760 mmHg, 29.92
inHg).
5.
If NG, replace absolute pressure sensor.
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P0455
Evaporative Emission (EVAP) Control System
(Gross Leak) (Cont’d)
EC-333
SEF767X
SEF768X
MEC488B
MAP/BARO switch solenoid valve
1. Start engine and warm it up to normal operating tem-
perature.
2. Perform “MAP/BARO SW/V” in “ACTIVE TEST” mode
with CONSULT-II.
3. Check the following.
I
Condition: At idle under no-load.
I
CONSULT-II display
MAP/BARO SW/V
ABSOL PRES/SE (Voltage)
BARO
More than 2.6V
MAP
Less than the voltage at BARO
I
Time for voltage to change
MAP/BARO SW/V
Required time to switch
BARO to MAP
Less than 1 second
MAP to BARO
4. If NG, check solenoid valve as shown below.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1. Remove MAP/BARO switch solenoid valve.
2. Check air passage continuity.
Condition
Air passage
continuity
between
q
A
and
q
B
Air passage
continuity
between
q
A
and
q
C
12V direct current supply
between
terminals
q
1
and
q
2
Yes
No
No supply
No
Yes
3. If NG or operation takes more than 1 second, replace
solenoid valve.
SEF405UA
Fuel tank temperature sensor
Check resistance by heating with hot water or heat gun as shown
in the figure.
Temperature °C (°F)
Resistance k
Ω
20 (68)
2.3 - 2.7
50 (122)
0.79 - 0.90
If NG, replace fuel tank temperature sensor.
TROUBLE DIAGNOSIS FOR DTC P0455
Evaporative Emission (EVAP) Control System
(Gross Leak) (Cont’d)
EC-334
SEF061T
Vehicle Speed Sensor (VSS)
COMPONENT DESCRIPTION
The vehicle speed sensor is installed in the transmission. It con-
tains a pulse generator which provides a vehicle speed signal to
the speedometer. The speedometer then sends a signal to the
ECM.
ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values, and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring voltage. Doing so may result in damage to the
ECM’s transistor. Use a ground other than ECM terminals such as the body ground.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA
(DC voltage)
68
P/L
Vehicle speed sensor
Engine is running.
Lift up drive wheels and run engine at idle in
“D” position.
Approximately 5.2V
SEF542T
ON BOARD DIAGNOSIS LOGIC
Diagnostic Trouble
Code No.
Malfunction is detected when .
Check Items
(Possible Cause)
P0500
0104
I
The almost 0 km/h (0 MPH) signal from the vehicle
speed sensor is sent to ECM even when the vehicle
is driving.
I
Harness or connector
(The vehicle speed sensor circuit is open or
shorted.)
I
Vehicle speed sensor
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P0500
EC-335
SEF274Y
DIAGNOSTIC TROUBLE CODE CONFIRMATION
PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting
the next test.
TESTING CONDITION:
Step 1 and 2 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.
1) Start engine.
2) Read vehicle speed sensor signal in “DATA MONITOR”
mode with CONSULT-II. The vehicle speed on CON-
SULT-II should exceed 10 km/h (6 MPH) when rotating
wheels with suitable gear position.
If NG, go to “DIAGNOSTIC PROCEDURE”, EC-339.
If OK, go to following step.
3) Select “DATA MONITOR” mode with CONSULT-II.
4) Warm engine up to normal operating temperature.
5) Maintain the following conditions for at least 10 con-
secutive seconds with TCS switch “OFF”.
CMPS-RPM (POS): 1,300 - 2,250 rpm
COOLAN TEMP/S: More than 70°C (158°F)
B/FUEL SCHDL: 2.0 - 3.5 msec
Selector lever: Suitable position
PW/ST SIGNAL: OFF
6) If 1st trip DTC is detected, go to “DIAGNOSTIC
PROCEDURE”, EC-339.
TROUBLE DIAGNOSIS FOR DTC P0500
Vehicle Speed Sensor (VSS) (Cont’d)
EC-336
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