Infiniti QX56 (Z62). Manual — part 590
EC-338
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair short to ground or short to power in harness or connectors.
6.
CHECK COMPONENTS
Check the following.
• Crankshaft position sensor (Refer to
EC-301, "Component Inspection (Crankshaft Position Sensor)"
.)
• Camshaft position sensor (bank 1) (Refer to
EC-306, "Component Inspection (Camshaft Position Sensor)"
.)
• Battery current sensor (Refer to
EC-414, "Component Inspection (Battery Current Sensor)"
• Refrigerant pressure sensor (Refer to
EC-520, "Component Function Check"
.)
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace malfunctioning component.
7.
CHECK APP SENSOR
EC-470, "Component Inspection (Accelerator Pedal Position Sensor)"
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> GO TO 8.
8.
REPLACE ACCELERATOR PEDAL ASSEMBLY
Replace accelerator pedal assembly.
Refer to
ACC-3, "MODELS WITHOUT DISTANCE CONTROL ASSIST SYSTEM : Removal and Installation"
(Without distance control assist system)
Refer to
ACC-4, "MODELS WITH DISTANCE CONTROL ASSIST SYSTEM : Removal and Installation"
distance control assist system).
>> INSPECTION END
9.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> GO TO 10.
10.
DETECT MALFUNCTIONING PART
Check the following.
• Harness for open or short between EVAP control system pressure sensor and ECM
E80
133
EVAP control system pressure sen-
sor
C17
3
Battery current sensor
E63
2
Refrigerant pressure sensor
E77
1
131
APP sensor 2 (Without ICC)
E110
1
APP sensor 2 (with ICC)
E67
9
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
EVAP control system
pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
C17
1
E80
150
Existed
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-339
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
• Loose or poor connection for each connector and harness
>> Repair open circuit, short to ground or short to power in harness or connectors.
11.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1.
Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> GO TO 12.
12.
DETECT MALFUNCTIONING PART
Check the following.
• Harness for open or short between EVAP control system pressure sensor and ECM
• Loose or poor connection for each connector and harness
>> Repair open circuit, short to ground or short to power in harness or connectors.
13.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-335, "Component Inspection (EVAP Control System Pressure Sensor)"
.
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Replace EVAP control system pressure sensor. Refer to
14.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection (EVAP Control System Pressure Sensor)
INFOID:0000000006288363
1.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
1.
Turn ignition switch OFF.
2.
Remove EVAP control system pressure sensor with its harness connector.
Always replace O-ring with a new one.
3.
Install a vacuum pump to EVAP control system pressure sensor.
4.
Turn ignition switch ON and check output voltage between ECM harness connector terminals under the
following conditions.
CAUTION:
• Always calibrate the vacuum pump gauge when using it.
EVAP control system
pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
C17
2
E80
143
Existed
ECM
Condition
[Applied vacuum kPa (kg/cm
2
, psi)]
Voltage (V)
Connector
+
–
Terminal
Terminal
E80
143
150
Not applied
1.8 - 4.8
-26.7 (-0.272, -3.87)
2.1 to 2.5 lower than above value
EC-340
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
• Never apply below -93.3 kPa (-0.952 kg/cm
2
, -13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm
2
,
14.69 psi).
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace EVAP control system pressure sensor.
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-341
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
DTC Logic
INFOID:0000000006288322
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Always perform test at a temperature of 5
°
C (41
°
F) or more.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
WITH CONSULT-III
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.
Turn ignition switch OFF and wait at least 10 seconds.
5.
Turn ignition switch ON.
6.
Select “DATA MONITOR” mode with CONSULT-III.
7.
Check that “FUEL T/TMP SE” is more than 0
°
C (32
°
F).
8.
Start engine and wait at least 20 seconds.
9.
Check 1st trip DTC.
WITH GST
1.
Start engine and warm it up to normal operating temperature.
2.
Set voltmeter probes to ECM harness connector terminals under the following conditions.
3.
Check that the voltage is less than 4.2 V.
DTC No.
Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0453
EVAP SYS PRES SEN
(EVAP control system pres-
sure sensor high input)
An excessively high voltage
from the sensor is sent to
ECM.
• Harness or connectors
(EVAP control system pressure sensor circuit is short-
ed.)
(Crankshaft position sensor circuit is open or shorted.)
[Camshaft position sensor (bank 1) circuit is shorted.]
(Accelerator pedal position sensor 2 circuit is shorted.)
(Battery current sensor circuit is shorted.)
(Refrigerant pressure sensor circuit is shorted.)
• EVAP control system pressure sensor
• Crankshaft position sensor
• Camshaft position sensor (bank 1)
• Accelerator pedal position sensor 2
• Battery current sensor
• Refrigerant pressure sensor
• EVAP canister vent control valve
• EVAP canister
• Rubber hose from EVAP canister vent control valve to
vehicle frame
ECM
Ground
Connector
+
–
Terminal
Terminal
E80
134
(Fuel tank temperature sensor signal)
175
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст